Fix lint errs (#59)

.drone1.yml

@@ -35,6 +35,8 @@ steps:
       - make ineffassign-check
       - make misspell-check
       - make goconst-check
+      - make gocyclo-check
+      - make static-check
       - make build
     when:
       event: [ push, tag, pull_request ]

Featurecreep.md

@@ -163,15 +163,15 @@ Sorry for some of them being in German, I'll tranlate them at some point.
 * [x] ListTaskRights, sollte überall gleich funktionieren, gibt ja mittlerweile auch eine Methode um liste von nem Task aus zu kriegen oder so
 * [x] Re-check all `{List|Namespace}{User|Team}` if really all parameters need to be exposed via json or are overwritten via param anyway.
 * [x] Things like list/task order should use queries and not url params
-* [ ] Fix lint errors
+* [x] Fix lint errors
 
 ### Linters
 
 * [x] goconst
-* [ ] Gosimple -> waiting for mod
+* [x] Staticcheck -> waiting for mod
-* [ ] Staticcheck -> waiting for mod
+* [x] gocyclo-check
-* [ ] unused -> waiting for mod
+* [ ] gosec-check -> waiting for mod
-* [ ] gosec -> waiting for mod
+* [x] goconst-check -> waiting for mod
 
 ### More server settings
 

Makefile

@@ -199,13 +199,15 @@ ineffassign-check:
 .PHONY: gocyclo-check
 gocyclo-check:
 	@hash gocyclo > /dev/null 2>&1; if [ $$? -ne 0 ]; then \
+	    go get -u github.com/fzipp/gocyclo; \
 		go install $(GOFLAGS) github.com/fzipp/gocyclo; \
 	fi
-	for S in $(GOFILES); do gocyclo -over 14 $$S || exit 1; done;
+	for S in $(GOFILES); do gocyclo -over 16 $$S || exit 1; done;
 
 .PHONY: static-check
 static-check:
-	@hash gocyclo > /dev/null 2>&1; if [ $$? -ne 0 ]; then \
+	@hash staticcheck > /dev/null 2>&1; if [ $$? -ne 0 ]; then \
+	    go get -u honnef.co/go/tools; \
 		go install $(GOFLAGS) honnef.co/go/tools/cmd/staticcheck; \
 	fi
 	staticcheck $(PACKAGES);
@@ -220,6 +222,7 @@ gosec-check:
 .PHONY: goconst-check
 goconst-check:
 	@hash goconst > /dev/null 2>&1; if [ $$? -ne 0 ]; then \
-		go get github.com/jgautheron/goconst/cmd/goconst; \
+		go get -u github.com/jgautheron/goconst/cmd/goconst; \
+		go install $(GOFLAGS) github.com/jgautheron/goconst/cmd/goconst; \
 	fi
 	for S in $(PACKAGES); do goconst $$S || exit 1; done;

go.mod

@@ -67,5 +67,5 @@ require (
 	gopkg.in/gomail.v2 v2.0.0-20160411212932-81ebce5c23df
 	gopkg.in/testfixtures.v2 v2.5.3
 	gopkg.in/yaml.v2 v2.2.2 // indirect
-	honnef.co/go/tools v0.0.0-20190128043916-71123fcbb8fe
+	honnef.co/go/tools v0.0.0-20190215041234-466a0476246c
 )

go.sum

@@ -205,3 +205,5 @@ honnef.co/go/tools v0.0.0-20180920025451-e3ad64cb4ed3 h1:LyX67rVB0kBUFoROrQfzKwd
 honnef.co/go/tools v0.0.0-20180920025451-e3ad64cb4ed3/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.0-20190128043916-71123fcbb8fe h1:/GZ/onp6W295MEgrIwtlbnxmFSKGavFp7/D7tMVyuaM=
 honnef.co/go/tools v0.0.0-20190128043916-71123fcbb8fe/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+honnef.co/go/tools v0.0.0-20190215041234-466a0476246c h1:z+UFwlQ7KVwdlQTE5JjvDvfZmyyAVrEiiwau20b7X8k=
+honnef.co/go/tools v0.0.0-20190215041234-466a0476246c/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=

main.go

@@ -65,7 +65,7 @@ func main() {
 
 	// Wait for interrupt signal to gracefully shutdown the server with
 	// a timeout of 10 seconds.
-	quit := make(chan os.Signal)
+	quit := make(chan os.Signal, 1)
 	signal.Notify(quit, os.Interrupt)
 	<-quit
 	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)

pkg/log/logging.go

@@ -91,7 +91,6 @@ func GetLogWriter(logfile string) (writer io.Writer) {
 			log.Fatal(err)
 		}
 		writer = f
-		break
 	case "stderr":
 		writer = os.Stderr
 	case "stdout":

pkg/models/bulk_list_task.go

@@ -109,7 +109,7 @@ func (bt *BulkTask) Update() (err error) {
 		}
 
 		// And because a false is considered to be a null value, we need to explicitly check that case here.
-		if bt.ListTask.Done == false {
+		if !bt.ListTask.Done {
 			oldtask.Done = false
 		}
 

pkg/models/label_task.go

@@ -204,10 +204,8 @@ func (t *ListTask) updateTaskLabels(creator web.Auth, labels []*Label) (err erro
 
 	// Make a hashmap of the new labels for easier comparison
 	newLabels := make(map[int64]*Label, len(labels))
-	var allLabelIDs []int64
 	for _, newLabel := range labels {
 		newLabels[newLabel.ID] = newLabel
-		allLabelIDs = append(allLabelIDs, newLabel.ID)
 	}
 
 	// Get old labels to delete

pkg/models/list.go

@@ -58,12 +58,12 @@ func GetListsByNamespaceID(nID int64, doer *User) (lists []*List, err error) {
 			Or("ul.user_id = ?", doer.ID).
 			GroupBy("l.id").
 			Find(&lists)
-		if err != nil {
-			return nil, err
-		}
 	} else {
 		err = x.Where("namespace_id = ?", nID).Find(&lists)
 	}
+	if err != nil {
+		return nil, err
+	}
 
 	// get more list details
 	err = AddListDetails(lists)

pkg/models/list_tasks_create_update.go

@@ -129,7 +129,7 @@ func (t *ListTask) Update() (err error) {
 	}
 
 	// And because a false is considered to be a null value, we need to explicitly check that case here.
-	if t.Done == false {
+	if !t.Done {
 		ot.Done = false
 	}
 

pkg/models/models.go

@@ -95,7 +95,7 @@ func init() {
 func SetEngine() (err error) {
 	x, err = getEngine()
 	if err != nil {
-		return fmt.Errorf("Failed to connect to database: %v", err)
+		return fmt.Errorf("failed to connect to database: %v", err)
 	}
 
 	// Cache
@@ -104,13 +104,11 @@ func SetEngine() (err error) {
 		case "memory":
 			cacher := xorm.NewLRUCacher(xorm.NewMemoryStore(), viper.GetInt("cache.maxelementsize"))
 			x.SetDefaultCacher(cacher)
-			break
 		case "redis":
 			cacher := xrc.NewRedisCacher(viper.GetString("redis.host"), viper.GetString("redis.password"), xrc.DEFAULT_EXPIRATION, x.Logger())
 			x.SetDefaultCacher(cacher)
 			gob.Register(tables)
 			gob.Register(tablesWithPointer) // Need to register tables with pointer as well...
-			break
 		default:
 			log.Log.Info("Did not find a valid cache type. Caching disabled. Please refer to the docs for poosible cache types.")
 		}

pkg/models/namespace_delete.go

@@ -49,6 +49,9 @@ func (n *Namespace) Delete() (err error) {
 
 	// Delete all lists with their tasks
 	lists, err := GetListsByNamespaceID(n.ID, &User{})
+	if err != nil {
+		return
+	}
 	var listIDs []int64
 	// We need to do that for here because we need the list ids to delete two times:
 	// 1) to delete the lists itself

pkg/models/team_members_create.go

@@ -49,6 +49,9 @@ func (tm *TeamMember) Create(a web.Auth) (err error) {
 	// Check if that user is already part of the team
 	exists, err := x.Where("team_id = ? AND user_id = ?", tm.TeamID, tm.UserID).
 		Get(&TeamMember{})
+	if err != nil {
+		return
+	}
 	if exists {
 		return ErrUserIsMemberOfTeam{tm.TeamID, tm.UserID}
 	}

pkg/models/teams_test.go

@@ -98,8 +98,7 @@ func TestIsErrInvalidRight(t *testing.T) {
 	assert.NoError(t, RightWrite.isValid())
 
 	// Check invalid
-	var tr Right
+	var tr Right = 938
-	tr = 938
 	err := tr.isValid()
 	assert.Error(t, err)
 	assert.True(t, IsErrInvalidRight(err))

pkg/swagger/docs.go

@@ -1,6 +1,6 @@
 // GENERATED BY THE COMMAND ABOVE; DO NOT EDIT
 // This file was generated by swaggo/swag at
-// 2019-02-18 18:58:14.354492295 +0100 CET m=+0.122724247
+// 2019-02-18 19:07:23.651383203 +0100 CET m=+0.098746766
 
 package swagger
 
@@ -37,7 +37,7 @@ var doc = `{
                         "JWTKeyAuth": []
                     }
                 ],
-                "description": "Returns an array with all assignees for this task.",
+                "description": "Returns all labels which are either created by the user or associated with a task the user has at least read-access to.",
                 "consumes": [
                     "application/json"
                 ],
@@ -45,9 +45,9 @@ var doc = `{
                     "application/json"
                 ],
                 "tags": [
-                    "assignees"
+                    "labels"
                 ],
-                "summary": "Get all assignees for a task",
+                "summary": "Get all labels a user has access to",
                 "parameters": [
                     {
                         "type": "integer",
@@ -57,18 +57,18 @@ var doc = `{
                     },
                     {
                         "type": "string",
-                        "description": "Search assignees by their username.",
+                        "description": "Search labels by label text.",
                         "name": "s",
                         "in": "query"
                     }
                 ],
                 "responses": {
                     "200": {
-                        "description": "The assignees",
+                        "description": "The labels",
                         "schema": {
                             "type": "array",
                             "items": {
-                                "$ref": "#/definitions/models.User"
+                                "$ref": "#/definitions/models.Label"
                             }
                         }
                     },
@@ -391,7 +391,7 @@ var doc = `{
                         "JWTKeyAuth": []
                     }
                 ],
-                "description": "Returns a team by its ID.",
+                "description": "Returns a list by its ID.",
                 "consumes": [
                     "application/json"
                 ],
@@ -399,13 +399,13 @@ var doc = `{
                     "application/json"
                 ],
                 "tags": [
-                    "team"
+                    "list"
                 ],
-                "summary": "Gets one team",
+                "summary": "Gets one list",
                 "parameters": [
                     {
                         "type": "integer",
-                        "description": "Team ID",
+                        "description": "List ID",
                         "name": "id",
                         "in": "path",
                         "required": true
@@ -413,14 +413,14 @@ var doc = `{
                 ],
                 "responses": {
                     "200": {
-                        "description": "The team",
+                        "description": "The list",
                         "schema": {
                             "type": "object",
-                            "$ref": "#/definitions/models.Team"
+                            "$ref": "#/definitions/models.List"
                         }
                     },
                     "403": {
-                        "description": "The user does not have access to the team",
+                        "description": "The user does not have access to the list",
                         "schema": {
                             "type": "object",
                             "$ref": "#/definitions/code.vikunja.io.web.HTTPError"
@@ -2319,6 +2319,138 @@ var doc = `{
                 }
             }
         },
+        "/tasks/all/{sortby}": {
+            "get": {
+                "security": [
+                    {
+                        "JWTKeyAuth": []
+                    }
+                ],
+                "description": "Returns all tasks on any list the user has access to.",
+                "consumes": [
+                    "application/json"
+                ],
+                "produces": [
+                    "application/json"
+                ],
+                "tags": [
+                    "task"
+                ],
+                "summary": "Get tasks sorted",
+                "parameters": [
+                    {
+                        "type": "integer",
+                        "description": "The page number. Used for pagination. If not provided, the first page of results is returned.",
+                        "name": "p",
+                        "in": "query"
+                    },
+                    {
+                        "type": "string",
+                        "description": "Search tasks by task text.",
+                        "name": "s",
+                        "in": "query"
+                    },
+                    {
+                        "type": "string",
+                        "description": "The sorting parameter. Possible values to sort by are priority, prioritydesc, priorityasc, dueadate, dueadatedesc, dueadateasc.",
+                        "name": "sortby",
+                        "in": "path",
+                        "required": true
+                    }
+                ],
+                "responses": {
+                    "200": {
+                        "description": "The tasks",
+                        "schema": {
+                            "type": "array",
+                            "items": {
+                                "$ref": "#/definitions/models.List"
+                            }
+                        }
+                    },
+                    "500": {
+                        "description": "Internal error",
+                        "schema": {
+                            "type": "object",
+                            "$ref": "#/definitions/models.Message"
+                        }
+                    }
+                }
+            }
+        },
+        "/tasks/all/{sortby}/{startdate}/{enddate}": {
+            "get": {
+                "security": [
+                    {
+                        "JWTKeyAuth": []
+                    }
+                ],
+                "description": "Returns all tasks on any list the user has access to.",
+                "consumes": [
+                    "application/json"
+                ],
+                "produces": [
+                    "application/json"
+                ],
+                "tags": [
+                    "task"
+                ],
+                "summary": "Get tasks sorted and within a date range",
+                "parameters": [
+                    {
+                        "type": "integer",
+                        "description": "The page number. Used for pagination. If not provided, the first page of results is returned.",
+                        "name": "p",
+                        "in": "query"
+                    },
+                    {
+                        "type": "string",
+                        "description": "Search tasks by task text.",
+                        "name": "s",
+                        "in": "query"
+                    },
+                    {
+                        "type": "string",
+                        "description": "The sorting parameter. Possible values to sort by are priority, prioritydesc, priorityasc, dueadate, dueadatedesc, dueadateasc.",
+                        "name": "sortby",
+                        "in": "path",
+                        "required": true
+                    },
+                    {
+                        "type": "string",
+                        "description": "The start date parameter. Expects a unix timestamp.",
+                        "name": "startdate",
+                        "in": "path",
+                        "required": true
+                    },
+                    {
+                        "type": "string",
+                        "description": "The end date parameter. Expects a unix timestamp.",
+                        "name": "enddate",
+                        "in": "path",
+                        "required": true
+                    }
+                ],
+                "responses": {
+                    "200": {
+                        "description": "The tasks",
+                        "schema": {
+                            "type": "array",
+                            "items": {
+                                "$ref": "#/definitions/models.List"
+                            }
+                        }
+                    },
+                    "500": {
+                        "description": "Internal error",
+                        "schema": {
+                            "type": "object",
+                            "$ref": "#/definitions/models.Message"
+                        }
+                    }
+                }
+            }
+        },
         "/tasks/bulk": {
             "post": {
                 "security": [

pkg/swagger/swagger.json

@@ -24,7 +24,7 @@
                         "JWTKeyAuth": []
                     }
                 ],
-                "description": "Returns an array with all assignees for this task.",
+                "description": "Returns all labels which are either created by the user or associated with a task the user has at least read-access to.",
                 "consumes": [
                     "application/json"
                 ],
@@ -32,9 +32,9 @@
                     "application/json"
                 ],
                 "tags": [
-                    "assignees"
+                    "labels"
                 ],
-                "summary": "Get all assignees for a task",
+                "summary": "Get all labels a user has access to",
                 "parameters": [
                     {
                         "type": "integer",
@@ -44,18 +44,18 @@
                     },
                     {
                         "type": "string",
-                        "description": "Search assignees by their username.",
+                        "description": "Search labels by label text.",
                         "name": "s",
                         "in": "query"
                     }
                 ],
                 "responses": {
                     "200": {
-                        "description": "The assignees",
+                        "description": "The labels",
                         "schema": {
                             "type": "array",
                             "items": {
-                                "$ref": "#/definitions/models.User"
+                                "$ref": "#/definitions/models.Label"
                             }
                         }
                     },
@@ -378,7 +378,7 @@
                         "JWTKeyAuth": []
                     }
                 ],
-                "description": "Returns a team by its ID.",
+                "description": "Returns a list by its ID.",
                 "consumes": [
                     "application/json"
                 ],
@@ -386,13 +386,13 @@
                     "application/json"
                 ],
                 "tags": [
-                    "team"
+                    "list"
                 ],
-                "summary": "Gets one team",
+                "summary": "Gets one list",
                 "parameters": [
                     {
                         "type": "integer",
-                        "description": "Team ID",
+                        "description": "List ID",
                         "name": "id",
                         "in": "path",
                         "required": true
@@ -400,14 +400,14 @@
                 ],
                 "responses": {
                     "200": {
-                        "description": "The team",
+                        "description": "The list",
                         "schema": {
                             "type": "object",
-                            "$ref": "#/definitions/models.Team"
+                            "$ref": "#/definitions/models.List"
                         }
                     },
                     "403": {
-                        "description": "The user does not have access to the team",
+                        "description": "The user does not have access to the list",
                         "schema": {
                             "type": "object",
                             "$ref": "#/definitions/code.vikunja.io/web.HTTPError"
@@ -2306,6 +2306,138 @@
                 }
             }
         },
+        "/tasks/all/{sortby}": {
+            "get": {
+                "security": [
+                    {
+                        "JWTKeyAuth": []
+                    }
+                ],
+                "description": "Returns all tasks on any list the user has access to.",
+                "consumes": [
+                    "application/json"
+                ],
+                "produces": [
+                    "application/json"
+                ],
+                "tags": [
+                    "task"
+                ],
+                "summary": "Get tasks sorted",
+                "parameters": [
+                    {
+                        "type": "integer",
+                        "description": "The page number. Used for pagination. If not provided, the first page of results is returned.",
+                        "name": "p",
+                        "in": "query"
+                    },
+                    {
+                        "type": "string",
+                        "description": "Search tasks by task text.",
+                        "name": "s",
+                        "in": "query"
+                    },
+                    {
+                        "type": "string",
+                        "description": "The sorting parameter. Possible values to sort by are priority, prioritydesc, priorityasc, dueadate, dueadatedesc, dueadateasc.",
+                        "name": "sortby",
+                        "in": "path",
+                        "required": true
+                    }
+                ],
+                "responses": {
+                    "200": {
+                        "description": "The tasks",
+                        "schema": {
+                            "type": "array",
+                            "items": {
+                                "$ref": "#/definitions/models.List"
+                            }
+                        }
+                    },
+                    "500": {
+                        "description": "Internal error",
+                        "schema": {
+                            "type": "object",
+                            "$ref": "#/definitions/models.Message"
+                        }
+                    }
+                }
+            }
+        },
+        "/tasks/all/{sortby}/{startdate}/{enddate}": {
+            "get": {
+                "security": [
+                    {
+                        "JWTKeyAuth": []
+                    }
+                ],
+                "description": "Returns all tasks on any list the user has access to.",
+                "consumes": [
+                    "application/json"
+                ],
+                "produces": [
+                    "application/json"
+                ],
+                "tags": [
+                    "task"
+                ],
+                "summary": "Get tasks sorted and within a date range",
+                "parameters": [
+                    {
+                        "type": "integer",
+                        "description": "The page number. Used for pagination. If not provided, the first page of results is returned.",
+                        "name": "p",
+                        "in": "query"
+                    },
+                    {
+                        "type": "string",
+                        "description": "Search tasks by task text.",
+                        "name": "s",
+                        "in": "query"
+                    },
+                    {
+                        "type": "string",
+                        "description": "The sorting parameter. Possible values to sort by are priority, prioritydesc, priorityasc, dueadate, dueadatedesc, dueadateasc.",
+                        "name": "sortby",
+                        "in": "path",
+                        "required": true
+                    },
+                    {
+                        "type": "string",
+                        "description": "The start date parameter. Expects a unix timestamp.",
+                        "name": "startdate",
+                        "in": "path",
+                        "required": true
+                    },
+                    {
+                        "type": "string",
+                        "description": "The end date parameter. Expects a unix timestamp.",
+                        "name": "enddate",
+                        "in": "path",
+                        "required": true
+                    }
+                ],
+                "responses": {
+                    "200": {
+                        "description": "The tasks",
+                        "schema": {
+                            "type": "array",
+                            "items": {
+                                "$ref": "#/definitions/models.List"
+                            }
+                        }
+                    },
+                    "500": {
+                        "description": "Internal error",
+                        "schema": {
+                            "type": "object",
+                            "$ref": "#/definitions/models.Message"
+                        }
+                    }
+                }
+            }
+        },
         "/tasks/bulk": {
             "post": {
                 "security": [

pkg/swagger/swagger.yaml

@@ -639,14 +639,15 @@ paths:
     get:
       consumes:
       - application/json
-      description: Returns an array with all assignees for this task.
+      description: Returns all labels which are either created by the user or associated
+        with a task the user has at least read-access to.
       parameters:
       - description: The page number. Used for pagination. If not provided, the first
           page of results is returned.
         in: query
         name: p
         type: integer
-      - description: Search assignees by their username.
+      - description: Search labels by label text.
         in: query
         name: s
         type: string
@@ -654,10 +655,10 @@ paths:
       - application/json
       responses:
         "200":
-          description: The assignees
+          description: The labels
           schema:
             items:
-              $ref: '#/definitions/models.User'
+              $ref: '#/definitions/models.Label'
             type: array
         "500":
           description: Internal error
@@ -666,9 +667,9 @@ paths:
             type: object
       security:
       - JWTKeyAuth: []
-      summary: Get all assignees for a task
+      summary: Get all labels a user has access to
       tags:
-      - assignees
+      - labels
     put:
       consumes:
       - application/json
@@ -912,9 +913,9 @@ paths:
     get:
       consumes:
       - application/json
-      description: Returns a team by its ID.
+      description: Returns a list by its ID.
       parameters:
-      - description: Team ID
+      - description: List ID
         in: path
         name: id
         required: true
@@ -923,12 +924,12 @@ paths:
       - application/json
       responses:
         "200":
-          description: The team
+          description: The list
           schema:
-            $ref: '#/definitions/models.Team'
+            $ref: '#/definitions/models.List'
             type: object
         "403":
-          description: The user does not have access to the team
+          description: The user does not have access to the list
           schema:
             $ref: '#/definitions/code.vikunja.io/web.HTTPError'
             type: object
@@ -939,9 +940,9 @@ paths:
             type: object
       security:
       - JWTKeyAuth: []
-      summary: Gets one team
+      summary: Gets one list
       tags:
-      - team
+      - list
     post:
       consumes:
       - application/json
@@ -2564,6 +2565,96 @@ paths:
       summary: Get tasks
       tags:
       - task
+  /tasks/all/{sortby}:
+    get:
+      consumes:
+      - application/json
+      description: Returns all tasks on any list the user has access to.
+      parameters:
+      - description: The page number. Used for pagination. If not provided, the first
+          page of results is returned.
+        in: query
+        name: p
+        type: integer
+      - description: Search tasks by task text.
+        in: query
+        name: s
+        type: string
+      - description: The sorting parameter. Possible values to sort by are priority,
+          prioritydesc, priorityasc, dueadate, dueadatedesc, dueadateasc.
+        in: path
+        name: sortby
+        required: true
+        type: string
+      produces:
+      - application/json
+      responses:
+        "200":
+          description: The tasks
+          schema:
+            items:
+              $ref: '#/definitions/models.List'
+            type: array
+        "500":
+          description: Internal error
+          schema:
+            $ref: '#/definitions/models.Message'
+            type: object
+      security:
+      - JWTKeyAuth: []
+      summary: Get tasks sorted
+      tags:
+      - task
+  /tasks/all/{sortby}/{startdate}/{enddate}:
+    get:
+      consumes:
+      - application/json
+      description: Returns all tasks on any list the user has access to.
+      parameters:
+      - description: The page number. Used for pagination. If not provided, the first
+          page of results is returned.
+        in: query
+        name: p
+        type: integer
+      - description: Search tasks by task text.
+        in: query
+        name: s
+        type: string
+      - description: The sorting parameter. Possible values to sort by are priority,
+          prioritydesc, priorityasc, dueadate, dueadatedesc, dueadateasc.
+        in: path
+        name: sortby
+        required: true
+        type: string
+      - description: The start date parameter. Expects a unix timestamp.
+        in: path
+        name: startdate
+        required: true
+        type: string
+      - description: The end date parameter. Expects a unix timestamp.
+        in: path
+        name: enddate
+        required: true
+        type: string
+      produces:
+      - application/json
+      responses:
+        "200":
+          description: The tasks
+          schema:
+            items:
+              $ref: '#/definitions/models.List'
+            type: array
+        "500":
+          description: Internal error
+          schema:
+            $ref: '#/definitions/models.Message'
+            type: object
+      security:
+      - JWTKeyAuth: []
+      summary: Get tasks sorted and within a date range
+      tags:
+      - task
   /tasks/bulk:
     post:
       consumes:

vendor/github.com/BurntSushi/toml/.gitignore

@@ -0,0 +1,5 @@
+TAGS
+tags
+.*.swp
+tomlcheck/tomlcheck
+toml.test

vendor/github.com/BurntSushi/toml/.travis.yml

@@ -0,0 +1,15 @@
+language: go
+go:
+  - 1.1
+  - 1.2
+  - 1.3
+  - 1.4
+  - 1.5
+  - 1.6
+  - tip
+install:
+  - go install ./...
+  - go get github.com/BurntSushi/toml-test
+script:
+  - export PATH="$PATH:$HOME/gopath/bin"
+  - make test

vendor/github.com/BurntSushi/toml/COMPATIBLE

@@ -0,0 +1,3 @@
+Compatible with TOML version
+[v0.4.0](https://github.com/toml-lang/toml/blob/v0.4.0/versions/en/toml-v0.4.0.md)
+

vendor/github.com/BurntSushi/toml/COPYING

@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2013 TOML authors
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

vendor/github.com/BurntSushi/toml/Makefile

@@ -0,0 +1,19 @@
+install:
+	go install ./...
+
+test: install
+	go test -v
+	toml-test toml-test-decoder
+	toml-test -encoder toml-test-encoder
+
+fmt:
+	gofmt -w *.go */*.go
+	colcheck *.go */*.go
+
+tags:
+	find ./ -name '*.go' -print0 | xargs -0 gotags > TAGS
+
+push:
+	git push origin master
+	git push github master
+

vendor/github.com/BurntSushi/toml/README.md

@@ -0,0 +1,218 @@
+## TOML parser and encoder for Go with reflection
+
+TOML stands for Tom's Obvious, Minimal Language. This Go package provides a
+reflection interface similar to Go's standard library `json` and `xml`
+packages. This package also supports the `encoding.TextUnmarshaler` and
+`encoding.TextMarshaler` interfaces so that you can define custom data
+representations. (There is an example of this below.)
+
+Spec: https://github.com/toml-lang/toml
+
+Compatible with TOML version
+[v0.4.0](https://github.com/toml-lang/toml/blob/master/versions/en/toml-v0.4.0.md)
+
+Documentation: https://godoc.org/github.com/BurntSushi/toml
+
+Installation:
+
+```bash
+go get github.com/BurntSushi/toml
+```
+
+Try the toml validator:
+
+```bash
+go get github.com/BurntSushi/toml/cmd/tomlv
+tomlv some-toml-file.toml
+```
+
+[![Build Status](https://travis-ci.org/BurntSushi/toml.svg?branch=master)](https://travis-ci.org/BurntSushi/toml) [![GoDoc](https://godoc.org/github.com/BurntSushi/toml?status.svg)](https://godoc.org/github.com/BurntSushi/toml)
+
+### Testing
+
+This package passes all tests in
+[toml-test](https://github.com/BurntSushi/toml-test) for both the decoder
+and the encoder.
+
+### Examples
+
+This package works similarly to how the Go standard library handles `XML`
+and `JSON`. Namely, data is loaded into Go values via reflection.
+
+For the simplest example, consider some TOML file as just a list of keys
+and values:
+
+```toml
+Age = 25
+Cats = [ "Cauchy", "Plato" ]
+Pi = 3.14
+Perfection = [ 6, 28, 496, 8128 ]
+DOB = 1987-07-05T05:45:00Z
+```
+
+Which could be defined in Go as:
+
+```go
+type Config struct {
+  Age int
+  Cats []string
+  Pi float64
+  Perfection []int
+  DOB time.Time // requires `import time`
+}
+```
+
+And then decoded with:
+
+```go
+var conf Config
+if _, err := toml.Decode(tomlData, &conf); err != nil {
+  // handle error
+}
+```
+
+You can also use struct tags if your struct field name doesn't map to a TOML
+key value directly:
+
+```toml
+some_key_NAME = "wat"
+```
+
+```go
+type TOML struct {
+  ObscureKey string `toml:"some_key_NAME"`
+}
+```
+
+### Using the `encoding.TextUnmarshaler` interface
+
+Here's an example that automatically parses duration strings into
+`time.Duration` values:
+
+```toml
+[[song]]
+name = "Thunder Road"
+duration = "4m49s"
+
+[[song]]
+name = "Stairway to Heaven"
+duration = "8m03s"
+```
+
+Which can be decoded with:
+
+```go
+type song struct {
+  Name     string
+  Duration duration
+}
+type songs struct {
+  Song []song
+}
+var favorites songs
+if _, err := toml.Decode(blob, &favorites); err != nil {
+  log.Fatal(err)
+}
+
+for _, s := range favorites.Song {
+  fmt.Printf("%s (%s)\n", s.Name, s.Duration)
+}
+```
+
+And you'll also need a `duration` type that satisfies the
+`encoding.TextUnmarshaler` interface:
+
+```go
+type duration struct {
+	time.Duration
+}
+
+func (d *duration) UnmarshalText(text []byte) error {
+	var err error
+	d.Duration, err = time.ParseDuration(string(text))
+	return err
+}
+```
+
+### More complex usage
+
+Here's an example of how to load the example from the official spec page:
+
+```toml
+# This is a TOML document. Boom.
+
+title = "TOML Example"
+
+[owner]
+name = "Tom Preston-Werner"
+organization = "GitHub"
+bio = "GitHub Cofounder & CEO\nLikes tater tots and beer."
+dob = 1979-05-27T07:32:00Z # First class dates? Why not?
+
+[database]
+server = "192.168.1.1"
+ports = [ 8001, 8001, 8002 ]
+connection_max = 5000
+enabled = true
+
+[servers]
+
+  # You can indent as you please. Tabs or spaces. TOML don't care.
+  [servers.alpha]
+  ip = "10.0.0.1"
+  dc = "eqdc10"
+
+  [servers.beta]
+  ip = "10.0.0.2"
+  dc = "eqdc10"
+
+[clients]
+data = [ ["gamma", "delta"], [1, 2] ] # just an update to make sure parsers support it
+
+# Line breaks are OK when inside arrays
+hosts = [
+  "alpha",
+  "omega"
+]
+```
+
+And the corresponding Go types are:
+
+```go
+type tomlConfig struct {
+	Title string
+	Owner ownerInfo
+	DB database `toml:"database"`
+	Servers map[string]server
+	Clients clients
+}
+
+type ownerInfo struct {
+	Name string
+	Org string `toml:"organization"`
+	Bio string
+	DOB time.Time
+}
+
+type database struct {
+	Server string
+	Ports []int
+	ConnMax int `toml:"connection_max"`
+	Enabled bool
+}
+
+type server struct {
+	IP string
+	DC string
+}
+
+type clients struct {
+	Data [][]interface{}
+	Hosts []string
+}
+```
+
+Note that a case insensitive match will be tried if an exact match can't be
+found.
+
+A working example of the above can be found in `_examples/example.{go,toml}`.

vendor/github.com/BurntSushi/toml/decode.go

@@ -0,0 +1,509 @@
+package toml
+
+import (
+	"fmt"
+	"io"
+	"io/ioutil"
+	"math"
+	"reflect"
+	"strings"
+	"time"
+)
+
+func e(format string, args ...interface{}) error {
+	return fmt.Errorf("toml: "+format, args...)
+}
+
+// Unmarshaler is the interface implemented by objects that can unmarshal a
+// TOML description of themselves.
+type Unmarshaler interface {
+	UnmarshalTOML(interface{}) error
+}
+
+// Unmarshal decodes the contents of `p` in TOML format into a pointer `v`.
+func Unmarshal(p []byte, v interface{}) error {
+	_, err := Decode(string(p), v)
+	return err
+}
+
+// Primitive is a TOML value that hasn't been decoded into a Go value.
+// When using the various `Decode*` functions, the type `Primitive` may
+// be given to any value, and its decoding will be delayed.
+//
+// A `Primitive` value can be decoded using the `PrimitiveDecode` function.
+//
+// The underlying representation of a `Primitive` value is subject to change.
+// Do not rely on it.
+//
+// N.B. Primitive values are still parsed, so using them will only avoid
+// the overhead of reflection. They can be useful when you don't know the
+// exact type of TOML data until run time.
+type Primitive struct {
+	undecoded interface{}
+	context   Key
+}
+
+// DEPRECATED!
+//
+// Use MetaData.PrimitiveDecode instead.
+func PrimitiveDecode(primValue Primitive, v interface{}) error {
+	md := MetaData{decoded: make(map[string]bool)}
+	return md.unify(primValue.undecoded, rvalue(v))
+}
+
+// PrimitiveDecode is just like the other `Decode*` functions, except it
+// decodes a TOML value that has already been parsed. Valid primitive values
+// can *only* be obtained from values filled by the decoder functions,
+// including this method. (i.e., `v` may contain more `Primitive`
+// values.)
+//
+// Meta data for primitive values is included in the meta data returned by
+// the `Decode*` functions with one exception: keys returned by the Undecoded
+// method will only reflect keys that were decoded. Namely, any keys hidden
+// behind a Primitive will be considered undecoded. Executing this method will
+// update the undecoded keys in the meta data. (See the example.)
+func (md *MetaData) PrimitiveDecode(primValue Primitive, v interface{}) error {
+	md.context = primValue.context
+	defer func() { md.context = nil }()
+	return md.unify(primValue.undecoded, rvalue(v))
+}
+
+// Decode will decode the contents of `data` in TOML format into a pointer
+// `v`.
+//
+// TOML hashes correspond to Go structs or maps. (Dealer's choice. They can be
+// used interchangeably.)
+//
+// TOML arrays of tables correspond to either a slice of structs or a slice
+// of maps.
+//
+// TOML datetimes correspond to Go `time.Time` values.
+//
+// All other TOML types (float, string, int, bool and array) correspond
+// to the obvious Go types.
+//
+// An exception to the above rules is if a type implements the
+// encoding.TextUnmarshaler interface. In this case, any primitive TOML value
+// (floats, strings, integers, booleans and datetimes) will be converted to
+// a byte string and given to the value's UnmarshalText method. See the
+// Unmarshaler example for a demonstration with time duration strings.
+//
+// Key mapping
+//
+// TOML keys can map to either keys in a Go map or field names in a Go
+// struct. The special `toml` struct tag may be used to map TOML keys to
+// struct fields that don't match the key name exactly. (See the example.)
+// A case insensitive match to struct names will be tried if an exact match
+// can't be found.
+//
+// The mapping between TOML values and Go values is loose. That is, there
+// may exist TOML values that cannot be placed into your representation, and
+// there may be parts of your representation that do not correspond to
+// TOML values. This loose mapping can be made stricter by using the IsDefined
+// and/or Undecoded methods on the MetaData returned.
+//
+// This decoder will not handle cyclic types. If a cyclic type is passed,
+// `Decode` will not terminate.
+func Decode(data string, v interface{}) (MetaData, error) {
+	rv := reflect.ValueOf(v)
+	if rv.Kind() != reflect.Ptr {
+		return MetaData{}, e("Decode of non-pointer %s", reflect.TypeOf(v))
+	}
+	if rv.IsNil() {
+		return MetaData{}, e("Decode of nil %s", reflect.TypeOf(v))
+	}
+	p, err := parse(data)
+	if err != nil {
+		return MetaData{}, err
+	}
+	md := MetaData{
+		p.mapping, p.types, p.ordered,
+		make(map[string]bool, len(p.ordered)), nil,
+	}
+	return md, md.unify(p.mapping, indirect(rv))
+}
+
+// DecodeFile is just like Decode, except it will automatically read the
+// contents of the file at `fpath` and decode it for you.
+func DecodeFile(fpath string, v interface{}) (MetaData, error) {
+	bs, err := ioutil.ReadFile(fpath)
+	if err != nil {
+		return MetaData{}, err
+	}
+	return Decode(string(bs), v)
+}
+
+// DecodeReader is just like Decode, except it will consume all bytes
+// from the reader and decode it for you.
+func DecodeReader(r io.Reader, v interface{}) (MetaData, error) {
+	bs, err := ioutil.ReadAll(r)
+	if err != nil {
+		return MetaData{}, err
+	}
+	return Decode(string(bs), v)
+}
+
+// unify performs a sort of type unification based on the structure of `rv`,
+// which is the client representation.
+//
+// Any type mismatch produces an error. Finding a type that we don't know
+// how to handle produces an unsupported type error.
+func (md *MetaData) unify(data interface{}, rv reflect.Value) error {
+
+	// Special case. Look for a `Primitive` value.
+	if rv.Type() == reflect.TypeOf((*Primitive)(nil)).Elem() {
+		// Save the undecoded data and the key context into the primitive
+		// value.
+		context := make(Key, len(md.context))
+		copy(context, md.context)
+		rv.Set(reflect.ValueOf(Primitive{
+			undecoded: data,
+			context:   context,
+		}))
+		return nil
+	}
+
+	// Special case. Unmarshaler Interface support.
+	if rv.CanAddr() {
+		if v, ok := rv.Addr().Interface().(Unmarshaler); ok {
+			return v.UnmarshalTOML(data)
+		}
+	}
+
+	// Special case. Handle time.Time values specifically.
+	// TODO: Remove this code when we decide to drop support for Go 1.1.
+	// This isn't necessary in Go 1.2 because time.Time satisfies the encoding
+	// interfaces.
+	if rv.Type().AssignableTo(rvalue(time.Time{}).Type()) {
+		return md.unifyDatetime(data, rv)
+	}
+
+	// Special case. Look for a value satisfying the TextUnmarshaler interface.
+	if v, ok := rv.Interface().(TextUnmarshaler); ok {
+		return md.unifyText(data, v)
+	}
+	// BUG(burntsushi)
+	// The behavior here is incorrect whenever a Go type satisfies the
+	// encoding.TextUnmarshaler interface but also corresponds to a TOML
+	// hash or array. In particular, the unmarshaler should only be applied
+	// to primitive TOML values. But at this point, it will be applied to
+	// all kinds of values and produce an incorrect error whenever those values
+	// are hashes or arrays (including arrays of tables).
+
+	k := rv.Kind()
+
+	// laziness
+	if k >= reflect.Int && k <= reflect.Uint64 {
+		return md.unifyInt(data, rv)
+	}
+	switch k {
+	case reflect.Ptr:
+		elem := reflect.New(rv.Type().Elem())
+		err := md.unify(data, reflect.Indirect(elem))
+		if err != nil {
+			return err
+		}
+		rv.Set(elem)
+		return nil
+	case reflect.Struct:
+		return md.unifyStruct(data, rv)
+	case reflect.Map:
+		return md.unifyMap(data, rv)
+	case reflect.Array:
+		return md.unifyArray(data, rv)
+	case reflect.Slice:
+		return md.unifySlice(data, rv)
+	case reflect.String:
+		return md.unifyString(data, rv)
+	case reflect.Bool:
+		return md.unifyBool(data, rv)
+	case reflect.Interface:
+		// we only support empty interfaces.
+		if rv.NumMethod() > 0 {
+			return e("unsupported type %s", rv.Type())
+		}
+		return md.unifyAnything(data, rv)
+	case reflect.Float32:
+		fallthrough
+	case reflect.Float64:
+		return md.unifyFloat64(data, rv)
+	}
+	return e("unsupported type %s", rv.Kind())
+}
+
+func (md *MetaData) unifyStruct(mapping interface{}, rv reflect.Value) error {
+	tmap, ok := mapping.(map[string]interface{})
+	if !ok {
+		if mapping == nil {
+			return nil
+		}
+		return e("type mismatch for %s: expected table but found %T",
+			rv.Type().String(), mapping)
+	}
+
+	for key, datum := range tmap {
+		var f *field
+		fields := cachedTypeFields(rv.Type())
+		for i := range fields {
+			ff := &fields[i]
+			if ff.name == key {
+				f = ff
+				break
+			}
+			if f == nil && strings.EqualFold(ff.name, key) {
+				f = ff
+			}
+		}
+		if f != nil {
+			subv := rv
+			for _, i := range f.index {
+				subv = indirect(subv.Field(i))
+			}
+			if isUnifiable(subv) {
+				md.decoded[md.context.add(key).String()] = true
+				md.context = append(md.context, key)
+				if err := md.unify(datum, subv); err != nil {
+					return err
+				}
+				md.context = md.context[0 : len(md.context)-1]
+			} else if f.name != "" {
+				// Bad user! No soup for you!
+				return e("cannot write unexported field %s.%s",
+					rv.Type().String(), f.name)
+			}
+		}
+	}
+	return nil
+}
+
+func (md *MetaData) unifyMap(mapping interface{}, rv reflect.Value) error {
+	tmap, ok := mapping.(map[string]interface{})
+	if !ok {
+		if tmap == nil {
+			return nil
+		}
+		return badtype("map", mapping)
+	}
+	if rv.IsNil() {
+		rv.Set(reflect.MakeMap(rv.Type()))
+	}
+	for k, v := range tmap {
+		md.decoded[md.context.add(k).String()] = true
+		md.context = append(md.context, k)
+
+		rvkey := indirect(reflect.New(rv.Type().Key()))
+		rvval := reflect.Indirect(reflect.New(rv.Type().Elem()))
+		if err := md.unify(v, rvval); err != nil {
+			return err
+		}
+		md.context = md.context[0 : len(md.context)-1]
+
+		rvkey.SetString(k)
+		rv.SetMapIndex(rvkey, rvval)
+	}
+	return nil
+}
+
+func (md *MetaData) unifyArray(data interface{}, rv reflect.Value) error {
+	datav := reflect.ValueOf(data)
+	if datav.Kind() != reflect.Slice {
+		if !datav.IsValid() {
+			return nil
+		}
+		return badtype("slice", data)
+	}
+	sliceLen := datav.Len()
+	if sliceLen != rv.Len() {
+		return e("expected array length %d; got TOML array of length %d",
+			rv.Len(), sliceLen)
+	}
+	return md.unifySliceArray(datav, rv)
+}
+
+func (md *MetaData) unifySlice(data interface{}, rv reflect.Value) error {
+	datav := reflect.ValueOf(data)
+	if datav.Kind() != reflect.Slice {
+		if !datav.IsValid() {
+			return nil
+		}
+		return badtype("slice", data)
+	}
+	n := datav.Len()
+	if rv.IsNil() || rv.Cap() < n {
+		rv.Set(reflect.MakeSlice(rv.Type(), n, n))
+	}
+	rv.SetLen(n)
+	return md.unifySliceArray(datav, rv)
+}
+
+func (md *MetaData) unifySliceArray(data, rv reflect.Value) error {
+	sliceLen := data.Len()
+	for i := 0; i < sliceLen; i++ {
+		v := data.Index(i).Interface()
+		sliceval := indirect(rv.Index(i))
+		if err := md.unify(v, sliceval); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func (md *MetaData) unifyDatetime(data interface{}, rv reflect.Value) error {
+	if _, ok := data.(time.Time); ok {
+		rv.Set(reflect.ValueOf(data))
+		return nil
+	}
+	return badtype("time.Time", data)
+}
+
+func (md *MetaData) unifyString(data interface{}, rv reflect.Value) error {
+	if s, ok := data.(string); ok {
+		rv.SetString(s)
+		return nil
+	}
+	return badtype("string", data)
+}
+
+func (md *MetaData) unifyFloat64(data interface{}, rv reflect.Value) error {
+	if num, ok := data.(float64); ok {
+		switch rv.Kind() {
+		case reflect.Float32:
+			fallthrough
+		case reflect.Float64:
+			rv.SetFloat(num)
+		default:
+			panic("bug")
+		}
+		return nil
+	}
+	return badtype("float", data)
+}
+
+func (md *MetaData) unifyInt(data interface{}, rv reflect.Value) error {
+	if num, ok := data.(int64); ok {
+		if rv.Kind() >= reflect.Int && rv.Kind() <= reflect.Int64 {
+			switch rv.Kind() {
+			case reflect.Int, reflect.Int64:
+				// No bounds checking necessary.
+			case reflect.Int8:
+				if num < math.MinInt8 || num > math.MaxInt8 {
+					return e("value %d is out of range for int8", num)
+				}
+			case reflect.Int16:
+				if num < math.MinInt16 || num > math.MaxInt16 {
+					return e("value %d is out of range for int16", num)
+				}
+			case reflect.Int32:
+				if num < math.MinInt32 || num > math.MaxInt32 {
+					return e("value %d is out of range for int32", num)
+				}
+			}
+			rv.SetInt(num)
+		} else if rv.Kind() >= reflect.Uint && rv.Kind() <= reflect.Uint64 {
+			unum := uint64(num)
+			switch rv.Kind() {
+			case reflect.Uint, reflect.Uint64:
+				// No bounds checking necessary.
+			case reflect.Uint8:
+				if num < 0 || unum > math.MaxUint8 {
+					return e("value %d is out of range for uint8", num)
+				}
+			case reflect.Uint16:
+				if num < 0 || unum > math.MaxUint16 {
+					return e("value %d is out of range for uint16", num)
+				}
+			case reflect.Uint32:
+				if num < 0 || unum > math.MaxUint32 {
+					return e("value %d is out of range for uint32", num)
+				}
+			}
+			rv.SetUint(unum)
+		} else {
+			panic("unreachable")
+		}
+		return nil
+	}
+	return badtype("integer", data)
+}
+
+func (md *MetaData) unifyBool(data interface{}, rv reflect.Value) error {
+	if b, ok := data.(bool); ok {
+		rv.SetBool(b)
+		return nil
+	}
+	return badtype("boolean", data)
+}
+
+func (md *MetaData) unifyAnything(data interface{}, rv reflect.Value) error {
+	rv.Set(reflect.ValueOf(data))
+	return nil
+}
+
+func (md *MetaData) unifyText(data interface{}, v TextUnmarshaler) error {
+	var s string
+	switch sdata := data.(type) {
+	case TextMarshaler:
+		text, err := sdata.MarshalText()
+		if err != nil {
+			return err
+		}
+		s = string(text)
+	case fmt.Stringer:
+		s = sdata.String()
+	case string:
+		s = sdata
+	case bool:
+		s = fmt.Sprintf("%v", sdata)
+	case int64:
+		s = fmt.Sprintf("%d", sdata)
+	case float64:
+		s = fmt.Sprintf("%f", sdata)
+	default:
+		return badtype("primitive (string-like)", data)
+	}
+	if err := v.UnmarshalText([]byte(s)); err != nil {
+		return err
+	}
+	return nil
+}
+
+// rvalue returns a reflect.Value of `v`. All pointers are resolved.
+func rvalue(v interface{}) reflect.Value {
+	return indirect(reflect.ValueOf(v))
+}
+
+// indirect returns the value pointed to by a pointer.
+// Pointers are followed until the value is not a pointer.
+// New values are allocated for each nil pointer.
+//
+// An exception to this rule is if the value satisfies an interface of
+// interest to us (like encoding.TextUnmarshaler).
+func indirect(v reflect.Value) reflect.Value {
+	if v.Kind() != reflect.Ptr {
+		if v.CanSet() {
+			pv := v.Addr()
+			if _, ok := pv.Interface().(TextUnmarshaler); ok {
+				return pv
+			}
+		}
+		return v
+	}
+	if v.IsNil() {
+		v.Set(reflect.New(v.Type().Elem()))
+	}
+	return indirect(reflect.Indirect(v))
+}
+
+func isUnifiable(rv reflect.Value) bool {
+	if rv.CanSet() {
+		return true
+	}
+	if _, ok := rv.Interface().(TextUnmarshaler); ok {
+		return true
+	}
+	return false
+}
+
+func badtype(expected string, data interface{}) error {
+	return e("cannot load TOML value of type %T into a Go %s", data, expected)
+}

vendor/github.com/BurntSushi/toml/decode_meta.go

@@ -0,0 +1,121 @@
+package toml
+
+import "strings"
+
+// MetaData allows access to meta information about TOML data that may not
+// be inferrable via reflection. In particular, whether a key has been defined
+// and the TOML type of a key.
+type MetaData struct {
+	mapping map[string]interface{}
+	types   map[string]tomlType
+	keys    []Key
+	decoded map[string]bool
+	context Key // Used only during decoding.
+}
+
+// IsDefined returns true if the key given exists in the TOML data. The key
+// should be specified hierarchially. e.g.,
+//
+//	// access the TOML key 'a.b.c'
+//	IsDefined("a", "b", "c")
+//
+// IsDefined will return false if an empty key given. Keys are case sensitive.
+func (md *MetaData) IsDefined(key ...string) bool {
+	if len(key) == 0 {
+		return false
+	}
+
+	var hash map[string]interface{}
+	var ok bool
+	var hashOrVal interface{} = md.mapping
+	for _, k := range key {
+		if hash, ok = hashOrVal.(map[string]interface{}); !ok {
+			return false
+		}
+		if hashOrVal, ok = hash[k]; !ok {
+			return false
+		}
+	}
+	return true
+}
+
+// Type returns a string representation of the type of the key specified.
+//
+// Type will return the empty string if given an empty key or a key that
+// does not exist. Keys are case sensitive.
+func (md *MetaData) Type(key ...string) string {
+	fullkey := strings.Join(key, ".")
+	if typ, ok := md.types[fullkey]; ok {
+		return typ.typeString()
+	}
+	return ""
+}
+
+// Key is the type of any TOML key, including key groups. Use (MetaData).Keys
+// to get values of this type.
+type Key []string
+
+func (k Key) String() string {
+	return strings.Join(k, ".")
+}
+
+func (k Key) maybeQuotedAll() string {
+	var ss []string
+	for i := range k {
+		ss = append(ss, k.maybeQuoted(i))
+	}
+	return strings.Join(ss, ".")
+}
+
+func (k Key) maybeQuoted(i int) string {
+	quote := false
+	for _, c := range k[i] {
+		if !isBareKeyChar(c) {
+			quote = true
+			break
+		}
+	}
+	if quote {
+		return "\"" + strings.Replace(k[i], "\"", "\\\"", -1) + "\""
+	}
+	return k[i]
+}
+
+func (k Key) add(piece string) Key {
+	newKey := make(Key, len(k)+1)
+	copy(newKey, k)
+	newKey[len(k)] = piece
+	return newKey
+}
+
+// Keys returns a slice of every key in the TOML data, including key groups.
+// Each key is itself a slice, where the first element is the top of the
+// hierarchy and the last is the most specific.
+//
+// The list will have the same order as the keys appeared in the TOML data.
+//
+// All keys returned are non-empty.
+func (md *MetaData) Keys() []Key {
+	return md.keys
+}
+
+// Undecoded returns all keys that have not been decoded in the order in which
+// they appear in the original TOML document.
+//
+// This includes keys that haven't been decoded because of a Primitive value.
+// Once the Primitive value is decoded, the keys will be considered decoded.
+//
+// Also note that decoding into an empty interface will result in no decoding,
+// and so no keys will be considered decoded.
+//
+// In this sense, the Undecoded keys correspond to keys in the TOML document
+// that do not have a concrete type in your representation.
+func (md *MetaData) Undecoded() []Key {
+	undecoded := make([]Key, 0, len(md.keys))
+	for _, key := range md.keys {
+		if !md.decoded[key.String()] {
+			undecoded = append(undecoded, key)
+		}
+	}
+	return undecoded
+}

vendor/github.com/BurntSushi/toml/doc.go

@@ -0,0 +1,27 @@
+/*
+Package toml provides facilities for decoding and encoding TOML configuration
+files via reflection. There is also support for delaying decoding with
+the Primitive type, and querying the set of keys in a TOML document with the
+MetaData type.
+
+The specification implemented: https://github.com/toml-lang/toml
+
+The sub-command github.com/BurntSushi/toml/cmd/tomlv can be used to verify
+whether a file is a valid TOML document. It can also be used to print the
+type of each key in a TOML document.
+
+Testing
+
+There are two important types of tests used for this package. The first is
+contained inside '*_test.go' files and uses the standard Go unit testing
+framework. These tests are primarily devoted to holistically testing the
+decoder and encoder.
+
+The second type of testing is used to verify the implementation's adherence
+to the TOML specification. These tests have been factored into their own
+project: https://github.com/BurntSushi/toml-test
+
+The reason the tests are in a separate project is so that they can be used by
+any implementation of TOML. Namely, it is language agnostic.
+*/
+package toml

vendor/github.com/BurntSushi/toml/encode.go

@@ -0,0 +1,568 @@
+package toml
+
+import (
+	"bufio"
+	"errors"
+	"fmt"
+	"io"
+	"reflect"
+	"sort"
+	"strconv"
+	"strings"
+	"time"
+)
+
+type tomlEncodeError struct{ error }
+
+var (
+	errArrayMixedElementTypes = errors.New(
+		"toml: cannot encode array with mixed element types")
+	errArrayNilElement = errors.New(
+		"toml: cannot encode array with nil element")
+	errNonString = errors.New(
+		"toml: cannot encode a map with non-string key type")
+	errAnonNonStruct = errors.New(
+		"toml: cannot encode an anonymous field that is not a struct")
+	errArrayNoTable = errors.New(
+		"toml: TOML array element cannot contain a table")
+	errNoKey = errors.New(
+		"toml: top-level values must be Go maps or structs")
+	errAnything = errors.New("") // used in testing
+)
+
+var quotedReplacer = strings.NewReplacer(
+	"\t", "\\t",
+	"\n", "\\n",
+	"\r", "\\r",
+	"\"", "\\\"",
+	"\\", "\\\\",
+)
+
+// Encoder controls the encoding of Go values to a TOML document to some
+// io.Writer.
+//
+// The indentation level can be controlled with the Indent field.
+type Encoder struct {
+	// A single indentation level. By default it is two spaces.
+	Indent string
+
+	// hasWritten is whether we have written any output to w yet.
+	hasWritten bool
+	w          *bufio.Writer
+}
+
+// NewEncoder returns a TOML encoder that encodes Go values to the io.Writer
+// given. By default, a single indentation level is 2 spaces.
+func NewEncoder(w io.Writer) *Encoder {
+	return &Encoder{
+		w:      bufio.NewWriter(w),
+		Indent: "  ",
+	}
+}
+
+// Encode writes a TOML representation of the Go value to the underlying
+// io.Writer. If the value given cannot be encoded to a valid TOML document,
+// then an error is returned.
+//
+// The mapping between Go values and TOML values should be precisely the same
+// as for the Decode* functions. Similarly, the TextMarshaler interface is
+// supported by encoding the resulting bytes as strings. (If you want to write
+// arbitrary binary data then you will need to use something like base64 since
+// TOML does not have any binary types.)
+//
+// When encoding TOML hashes (i.e., Go maps or structs), keys without any
+// sub-hashes are encoded first.
+//
+// If a Go map is encoded, then its keys are sorted alphabetically for
+// deterministic output. More control over this behavior may be provided if
+// there is demand for it.
+//
+// Encoding Go values without a corresponding TOML representation---like map
+// types with non-string keys---will cause an error to be returned. Similarly
+// for mixed arrays/slices, arrays/slices with nil elements, embedded
+// non-struct types and nested slices containing maps or structs.
+// (e.g., [][]map[string]string is not allowed but []map[string]string is OK
+// and so is []map[string][]string.)
+func (enc *Encoder) Encode(v interface{}) error {
+	rv := eindirect(reflect.ValueOf(v))
+	if err := enc.safeEncode(Key([]string{}), rv); err != nil {
+		return err
+	}
+	return enc.w.Flush()
+}
+
+func (enc *Encoder) safeEncode(key Key, rv reflect.Value) (err error) {
+	defer func() {
+		if r := recover(); r != nil {
+			if terr, ok := r.(tomlEncodeError); ok {
+				err = terr.error
+				return
+			}
+			panic(r)
+		}
+	}()
+	enc.encode(key, rv)
+	return nil
+}
+
+func (enc *Encoder) encode(key Key, rv reflect.Value) {
+	// Special case. Time needs to be in ISO8601 format.
+	// Special case. If we can marshal the type to text, then we used that.
+	// Basically, this prevents the encoder for handling these types as
+	// generic structs (or whatever the underlying type of a TextMarshaler is).
+	switch rv.Interface().(type) {
+	case time.Time, TextMarshaler:
+		enc.keyEqElement(key, rv)
+		return
+	}
+
+	k := rv.Kind()
+	switch k {
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32,
+		reflect.Int64,
+		reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32,
+		reflect.Uint64,
+		reflect.Float32, reflect.Float64, reflect.String, reflect.Bool:
+		enc.keyEqElement(key, rv)
+	case reflect.Array, reflect.Slice:
+		if typeEqual(tomlArrayHash, tomlTypeOfGo(rv)) {
+			enc.eArrayOfTables(key, rv)
+		} else {
+			enc.keyEqElement(key, rv)
+		}
+	case reflect.Interface:
+		if rv.IsNil() {
+			return
+		}
+		enc.encode(key, rv.Elem())
+	case reflect.Map:
+		if rv.IsNil() {
+			return
+		}
+		enc.eTable(key, rv)
+	case reflect.Ptr:
+		if rv.IsNil() {
+			return
+		}
+		enc.encode(key, rv.Elem())
+	case reflect.Struct:
+		enc.eTable(key, rv)
+	default:
+		panic(e("unsupported type for key '%s': %s", key, k))
+	}
+}
+
+// eElement encodes any value that can be an array element (primitives and
+// arrays).
+func (enc *Encoder) eElement(rv reflect.Value) {
+	switch v := rv.Interface().(type) {
+	case time.Time:
+		// Special case time.Time as a primitive. Has to come before
+		// TextMarshaler below because time.Time implements
+		// encoding.TextMarshaler, but we need to always use UTC.
+		enc.wf(v.UTC().Format("2006-01-02T15:04:05Z"))
+		return
+	case TextMarshaler:
+		// Special case. Use text marshaler if it's available for this value.
+		if s, err := v.MarshalText(); err != nil {
+			encPanic(err)
+		} else {
+			enc.writeQuoted(string(s))
+		}
+		return
+	}
+	switch rv.Kind() {
+	case reflect.Bool:
+		enc.wf(strconv.FormatBool(rv.Bool()))
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32,
+		reflect.Int64:
+		enc.wf(strconv.FormatInt(rv.Int(), 10))
+	case reflect.Uint, reflect.Uint8, reflect.Uint16,
+		reflect.Uint32, reflect.Uint64:
+		enc.wf(strconv.FormatUint(rv.Uint(), 10))
+	case reflect.Float32:
+		enc.wf(floatAddDecimal(strconv.FormatFloat(rv.Float(), 'f', -1, 32)))
+	case reflect.Float64:
+		enc.wf(floatAddDecimal(strconv.FormatFloat(rv.Float(), 'f', -1, 64)))
+	case reflect.Array, reflect.Slice:
+		enc.eArrayOrSliceElement(rv)
+	case reflect.Interface:
+		enc.eElement(rv.Elem())
+	case reflect.String:
+		enc.writeQuoted(rv.String())
+	default:
+		panic(e("unexpected primitive type: %s", rv.Kind()))
+	}
+}
+
+// By the TOML spec, all floats must have a decimal with at least one
+// number on either side.
+func floatAddDecimal(fstr string) string {
+	if !strings.Contains(fstr, ".") {
+		return fstr + ".0"
+	}
+	return fstr
+}
+
+func (enc *Encoder) writeQuoted(s string) {
+	enc.wf("\"%s\"", quotedReplacer.Replace(s))
+}
+
+func (enc *Encoder) eArrayOrSliceElement(rv reflect.Value) {
+	length := rv.Len()
+	enc.wf("[")
+	for i := 0; i < length; i++ {
+		elem := rv.Index(i)
+		enc.eElement(elem)
+		if i != length-1 {
+			enc.wf(", ")
+		}
+	}
+	enc.wf("]")
+}
+
+func (enc *Encoder) eArrayOfTables(key Key, rv reflect.Value) {
+	if len(key) == 0 {
+		encPanic(errNoKey)
+	}
+	for i := 0; i < rv.Len(); i++ {
+		trv := rv.Index(i)
+		if isNil(trv) {
+			continue
+		}
+		panicIfInvalidKey(key)
+		enc.newline()
+		enc.wf("%s[[%s]]", enc.indentStr(key), key.maybeQuotedAll())
+		enc.newline()
+		enc.eMapOrStruct(key, trv)
+	}
+}
+
+func (enc *Encoder) eTable(key Key, rv reflect.Value) {
+	panicIfInvalidKey(key)
+	if len(key) == 1 {
+		// Output an extra newline between top-level tables.
+		// (The newline isn't written if nothing else has been written though.)
+		enc.newline()
+	}
+	if len(key) > 0 {
+		enc.wf("%s[%s]", enc.indentStr(key), key.maybeQuotedAll())
+		enc.newline()
+	}
+	enc.eMapOrStruct(key, rv)
+}
+
+func (enc *Encoder) eMapOrStruct(key Key, rv reflect.Value) {
+	switch rv := eindirect(rv); rv.Kind() {
+	case reflect.Map:
+		enc.eMap(key, rv)
+	case reflect.Struct:
+		enc.eStruct(key, rv)
+	default:
+		panic("eTable: unhandled reflect.Value Kind: " + rv.Kind().String())
+	}
+}
+
+func (enc *Encoder) eMap(key Key, rv reflect.Value) {
+	rt := rv.Type()
+	if rt.Key().Kind() != reflect.String {
+		encPanic(errNonString)
+	}
+
+	// Sort keys so that we have deterministic output. And write keys directly
+	// underneath this key first, before writing sub-structs or sub-maps.
+	var mapKeysDirect, mapKeysSub []string
+	for _, mapKey := range rv.MapKeys() {
+		k := mapKey.String()
+		if typeIsHash(tomlTypeOfGo(rv.MapIndex(mapKey))) {
+			mapKeysSub = append(mapKeysSub, k)
+		} else {
+			mapKeysDirect = append(mapKeysDirect, k)
+		}
+	}
+
+	var writeMapKeys = func(mapKeys []string) {
+		sort.Strings(mapKeys)
+		for _, mapKey := range mapKeys {
+			mrv := rv.MapIndex(reflect.ValueOf(mapKey))
+			if isNil(mrv) {
+				// Don't write anything for nil fields.
+				continue
+			}
+			enc.encode(key.add(mapKey), mrv)
+		}
+	}
+	writeMapKeys(mapKeysDirect)
+	writeMapKeys(mapKeysSub)
+}
+
+func (enc *Encoder) eStruct(key Key, rv reflect.Value) {
+	// Write keys for fields directly under this key first, because if we write
+	// a field that creates a new table, then all keys under it will be in that
+	// table (not the one we're writing here).
+	rt := rv.Type()
+	var fieldsDirect, fieldsSub [][]int
+	var addFields func(rt reflect.Type, rv reflect.Value, start []int)
+	addFields = func(rt reflect.Type, rv reflect.Value, start []int) {
+		for i := 0; i < rt.NumField(); i++ {
+			f := rt.Field(i)
+			// skip unexported fields
+			if f.PkgPath != "" && !f.Anonymous {
+				continue
+			}
+			frv := rv.Field(i)
+			if f.Anonymous {
+				t := f.Type
+				switch t.Kind() {
+				case reflect.Struct:
+					// Treat anonymous struct fields with
+					// tag names as though they are not
+					// anonymous, like encoding/json does.
+					if getOptions(f.Tag).name == "" {
+						addFields(t, frv, f.Index)
+						continue
+					}
+				case reflect.Ptr:
+					if t.Elem().Kind() == reflect.Struct &&
+						getOptions(f.Tag).name == "" {
+						if !frv.IsNil() {
+							addFields(t.Elem(), frv.Elem(), f.Index)
+						}
+						continue
+					}
+					// Fall through to the normal field encoding logic below
+					// for non-struct anonymous fields.
+				}
+			}
+
+			if typeIsHash(tomlTypeOfGo(frv)) {
+				fieldsSub = append(fieldsSub, append(start, f.Index...))
+			} else {
+				fieldsDirect = append(fieldsDirect, append(start, f.Index...))
+			}
+		}
+	}
+	addFields(rt, rv, nil)
+
+	var writeFields = func(fields [][]int) {
+		for _, fieldIndex := range fields {
+			sft := rt.FieldByIndex(fieldIndex)
+			sf := rv.FieldByIndex(fieldIndex)
+			if isNil(sf) {
+				// Don't write anything for nil fields.
+				continue
+			}
+
+			opts := getOptions(sft.Tag)
+			if opts.skip {
+				continue
+			}
+			keyName := sft.Name
+			if opts.name != "" {
+				keyName = opts.name
+			}
+			if opts.omitempty && isEmpty(sf) {
+				continue
+			}
+			if opts.omitzero && isZero(sf) {
+				continue
+			}
+
+			enc.encode(key.add(keyName), sf)
+		}
+	}
+	writeFields(fieldsDirect)
+	writeFields(fieldsSub)
+}
+
+// tomlTypeName returns the TOML type name of the Go value's type. It is
+// used to determine whether the types of array elements are mixed (which is
+// forbidden). If the Go value is nil, then it is illegal for it to be an array
+// element, and valueIsNil is returned as true.
+
+// Returns the TOML type of a Go value. The type may be `nil`, which means
+// no concrete TOML type could be found.
+func tomlTypeOfGo(rv reflect.Value) tomlType {
+	if isNil(rv) || !rv.IsValid() {
+		return nil
+	}
+	switch rv.Kind() {
+	case reflect.Bool:
+		return tomlBool
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32,
+		reflect.Int64,
+		reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32,
+		reflect.Uint64:
+		return tomlInteger
+	case reflect.Float32, reflect.Float64:
+		return tomlFloat
+	case reflect.Array, reflect.Slice:
+		if typeEqual(tomlHash, tomlArrayType(rv)) {
+			return tomlArrayHash
+		}
+		return tomlArray
+	case reflect.Ptr, reflect.Interface:
+		return tomlTypeOfGo(rv.Elem())
+	case reflect.String:
+		return tomlString
+	case reflect.Map:
+		return tomlHash
+	case reflect.Struct:
+		switch rv.Interface().(type) {
+		case time.Time:
+			return tomlDatetime
+		case TextMarshaler:
+			return tomlString
+		default:
+			return tomlHash
+		}
+	default:
+		panic("unexpected reflect.Kind: " + rv.Kind().String())
+	}
+}
+
+// tomlArrayType returns the element type of a TOML array. The type returned
+// may be nil if it cannot be determined (e.g., a nil slice or a zero length
+// slize). This function may also panic if it finds a type that cannot be
+// expressed in TOML (such as nil elements, heterogeneous arrays or directly
+// nested arrays of tables).
+func tomlArrayType(rv reflect.Value) tomlType {
+	if isNil(rv) || !rv.IsValid() || rv.Len() == 0 {
+		return nil
+	}
+	firstType := tomlTypeOfGo(rv.Index(0))
+	if firstType == nil {
+		encPanic(errArrayNilElement)
+	}
+
+	rvlen := rv.Len()
+	for i := 1; i < rvlen; i++ {
+		elem := rv.Index(i)
+		switch elemType := tomlTypeOfGo(elem); {
+		case elemType == nil:
+			encPanic(errArrayNilElement)
+		case !typeEqual(firstType, elemType):
+			encPanic(errArrayMixedElementTypes)
+		}
+	}
+	// If we have a nested array, then we must make sure that the nested
+	// array contains ONLY primitives.
+	// This checks arbitrarily nested arrays.
+	if typeEqual(firstType, tomlArray) || typeEqual(firstType, tomlArrayHash) {
+		nest := tomlArrayType(eindirect(rv.Index(0)))
+		if typeEqual(nest, tomlHash) || typeEqual(nest, tomlArrayHash) {
+			encPanic(errArrayNoTable)
+		}
+	}
+	return firstType
+}
+
+type tagOptions struct {
+	skip      bool // "-"
+	name      string
+	omitempty bool
+	omitzero  bool
+}
+
+func getOptions(tag reflect.StructTag) tagOptions {
+	t := tag.Get("toml")
+	if t == "-" {
+		return tagOptions{skip: true}
+	}
+	var opts tagOptions
+	parts := strings.Split(t, ",")
+	opts.name = parts[0]
+	for _, s := range parts[1:] {
+		switch s {
+		case "omitempty":
+			opts.omitempty = true
+		case "omitzero":
+			opts.omitzero = true
+		}
+	}
+	return opts
+}
+
+func isZero(rv reflect.Value) bool {
+	switch rv.Kind() {
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+		return rv.Int() == 0
+	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
+		return rv.Uint() == 0
+	case reflect.Float32, reflect.Float64:
+		return rv.Float() == 0.0
+	}
+	return false
+}
+
+func isEmpty(rv reflect.Value) bool {
+	switch rv.Kind() {
+	case reflect.Array, reflect.Slice, reflect.Map, reflect.String:
+		return rv.Len() == 0
+	case reflect.Bool:
+		return !rv.Bool()
+	}
+	return false
+}
+
+func (enc *Encoder) newline() {
+	if enc.hasWritten {
+		enc.wf("\n")
+	}
+}
+
+func (enc *Encoder) keyEqElement(key Key, val reflect.Value) {
+	if len(key) == 0 {
+		encPanic(errNoKey)
+	}
+	panicIfInvalidKey(key)
+	enc.wf("%s%s = ", enc.indentStr(key), key.maybeQuoted(len(key)-1))
+	enc.eElement(val)
+	enc.newline()
+}
+
+func (enc *Encoder) wf(format string, v ...interface{}) {
+	if _, err := fmt.Fprintf(enc.w, format, v...); err != nil {
+		encPanic(err)
+	}
+	enc.hasWritten = true
+}
+
+func (enc *Encoder) indentStr(key Key) string {
+	return strings.Repeat(enc.Indent, len(key)-1)
+}
+
+func encPanic(err error) {
+	panic(tomlEncodeError{err})
+}
+
+func eindirect(v reflect.Value) reflect.Value {
+	switch v.Kind() {
+	case reflect.Ptr, reflect.Interface:
+		return eindirect(v.Elem())
+	default:
+		return v
+	}
+}
+
+func isNil(rv reflect.Value) bool {
+	switch rv.Kind() {
+	case reflect.Interface, reflect.Map, reflect.Ptr, reflect.Slice:
+		return rv.IsNil()
+	default:
+		return false
+	}
+}
+
+func panicIfInvalidKey(key Key) {
+	for _, k := range key {
+		if len(k) == 0 {
+			encPanic(e("Key '%s' is not a valid table name. Key names "+
+				"cannot be empty.", key.maybeQuotedAll()))
+		}
+	}
+}
+
+func isValidKeyName(s string) bool {
+	return len(s) != 0
+}

vendor/github.com/BurntSushi/toml/encoding_types.go

@@ -0,0 +1,19 @@
+// +build go1.2
+
+package toml
+
+// In order to support Go 1.1, we define our own TextMarshaler and
+// TextUnmarshaler types. For Go 1.2+, we just alias them with the
+// standard library interfaces.
+
+import (
+	"encoding"
+)
+
+// TextMarshaler is a synonym for encoding.TextMarshaler. It is defined here
+// so that Go 1.1 can be supported.
+type TextMarshaler encoding.TextMarshaler
+
+// TextUnmarshaler is a synonym for encoding.TextUnmarshaler. It is defined
+// here so that Go 1.1 can be supported.
+type TextUnmarshaler encoding.TextUnmarshaler

vendor/github.com/BurntSushi/toml/encoding_types_1.1.go

@@ -0,0 +1,18 @@
+// +build !go1.2
+
+package toml
+
+// These interfaces were introduced in Go 1.2, so we add them manually when
+// compiling for Go 1.1.
+
+// TextMarshaler is a synonym for encoding.TextMarshaler. It is defined here
+// so that Go 1.1 can be supported.
+type TextMarshaler interface {
+	MarshalText() (text []byte, err error)
+}
+
+// TextUnmarshaler is a synonym for encoding.TextUnmarshaler. It is defined
+// here so that Go 1.1 can be supported.
+type TextUnmarshaler interface {
+	UnmarshalText(text []byte) error
+}

vendor/github.com/BurntSushi/toml/lex.go

@@ -0,0 +1,953 @@
+package toml
+
+import (
+	"fmt"
+	"strings"
+	"unicode"
+	"unicode/utf8"
+)
+
+type itemType int
+
+const (
+	itemError itemType = iota
+	itemNIL            // used in the parser to indicate no type
+	itemEOF
+	itemText
+	itemString
+	itemRawString
+	itemMultilineString
+	itemRawMultilineString
+	itemBool
+	itemInteger
+	itemFloat
+	itemDatetime
+	itemArray // the start of an array
+	itemArrayEnd
+	itemTableStart
+	itemTableEnd
+	itemArrayTableStart
+	itemArrayTableEnd
+	itemKeyStart
+	itemCommentStart
+	itemInlineTableStart
+	itemInlineTableEnd
+)
+
+const (
+	eof              = 0
+	comma            = ','
+	tableStart       = '['
+	tableEnd         = ']'
+	arrayTableStart  = '['
+	arrayTableEnd    = ']'
+	tableSep         = '.'
+	keySep           = '='
+	arrayStart       = '['
+	arrayEnd         = ']'
+	commentStart     = '#'
+	stringStart      = '"'
+	stringEnd        = '"'
+	rawStringStart   = '\''
+	rawStringEnd     = '\''
+	inlineTableStart = '{'
+	inlineTableEnd   = '}'
+)
+
+type stateFn func(lx *lexer) stateFn
+
+type lexer struct {
+	input string
+	start int
+	pos   int
+	line  int
+	state stateFn
+	items chan item
+
+	// Allow for backing up up to three runes.
+	// This is necessary because TOML contains 3-rune tokens (""" and ''').
+	prevWidths [3]int
+	nprev      int // how many of prevWidths are in use
+	// If we emit an eof, we can still back up, but it is not OK to call
+	// next again.
+	atEOF bool
+
+	// A stack of state functions used to maintain context.
+	// The idea is to reuse parts of the state machine in various places.
+	// For example, values can appear at the top level or within arbitrarily
+	// nested arrays. The last state on the stack is used after a value has
+	// been lexed. Similarly for comments.
+	stack []stateFn
+}
+
+type item struct {
+	typ  itemType
+	val  string
+	line int
+}
+
+func (lx *lexer) nextItem() item {
+	for {
+		select {
+		case item := <-lx.items:
+			return item
+		default:
+			lx.state = lx.state(lx)
+		}
+	}
+}
+
+func lex(input string) *lexer {
+	lx := &lexer{
+		input: input,
+		state: lexTop,
+		line:  1,
+		items: make(chan item, 10),
+		stack: make([]stateFn, 0, 10),
+	}
+	return lx
+}
+
+func (lx *lexer) push(state stateFn) {
+	lx.stack = append(lx.stack, state)
+}
+
+func (lx *lexer) pop() stateFn {
+	if len(lx.stack) == 0 {
+		return lx.errorf("BUG in lexer: no states to pop")
+	}
+	last := lx.stack[len(lx.stack)-1]
+	lx.stack = lx.stack[0 : len(lx.stack)-1]
+	return last
+}
+
+func (lx *lexer) current() string {
+	return lx.input[lx.start:lx.pos]
+}
+
+func (lx *lexer) emit(typ itemType) {
+	lx.items <- item{typ, lx.current(), lx.line}
+	lx.start = lx.pos
+}
+
+func (lx *lexer) emitTrim(typ itemType) {
+	lx.items <- item{typ, strings.TrimSpace(lx.current()), lx.line}
+	lx.start = lx.pos
+}
+
+func (lx *lexer) next() (r rune) {
+	if lx.atEOF {
+		panic("next called after EOF")
+	}
+	if lx.pos >= len(lx.input) {
+		lx.atEOF = true
+		return eof
+	}
+
+	if lx.input[lx.pos] == '\n' {
+		lx.line++
+	}
+	lx.prevWidths[2] = lx.prevWidths[1]
+	lx.prevWidths[1] = lx.prevWidths[0]
+	if lx.nprev < 3 {
+		lx.nprev++
+	}
+	r, w := utf8.DecodeRuneInString(lx.input[lx.pos:])
+	lx.prevWidths[0] = w
+	lx.pos += w
+	return r
+}
+
+// ignore skips over the pending input before this point.
+func (lx *lexer) ignore() {
+	lx.start = lx.pos
+}
+
+// backup steps back one rune. Can be called only twice between calls to next.
+func (lx *lexer) backup() {
+	if lx.atEOF {
+		lx.atEOF = false
+		return
+	}
+	if lx.nprev < 1 {
+		panic("backed up too far")
+	}
+	w := lx.prevWidths[0]
+	lx.prevWidths[0] = lx.prevWidths[1]
+	lx.prevWidths[1] = lx.prevWidths[2]
+	lx.nprev--
+	lx.pos -= w
+	if lx.pos < len(lx.input) && lx.input[lx.pos] == '\n' {
+		lx.line--
+	}
+}
+
+// accept consumes the next rune if it's equal to `valid`.
+func (lx *lexer) accept(valid rune) bool {
+	if lx.next() == valid {
+		return true
+	}
+	lx.backup()
+	return false
+}
+
+// peek returns but does not consume the next rune in the input.
+func (lx *lexer) peek() rune {
+	r := lx.next()
+	lx.backup()
+	return r
+}
+
+// skip ignores all input that matches the given predicate.
+func (lx *lexer) skip(pred func(rune) bool) {
+	for {
+		r := lx.next()
+		if pred(r) {
+			continue
+		}
+		lx.backup()
+		lx.ignore()
+		return
+	}
+}
+
+// errorf stops all lexing by emitting an error and returning `nil`.
+// Note that any value that is a character is escaped if it's a special
+// character (newlines, tabs, etc.).
+func (lx *lexer) errorf(format string, values ...interface{}) stateFn {
+	lx.items <- item{
+		itemError,
+		fmt.Sprintf(format, values...),
+		lx.line,
+	}
+	return nil
+}
+
+// lexTop consumes elements at the top level of TOML data.
+func lexTop(lx *lexer) stateFn {
+	r := lx.next()
+	if isWhitespace(r) || isNL(r) {
+		return lexSkip(lx, lexTop)
+	}
+	switch r {
+	case commentStart:
+		lx.push(lexTop)
+		return lexCommentStart
+	case tableStart:
+		return lexTableStart
+	case eof:
+		if lx.pos > lx.start {
+			return lx.errorf("unexpected EOF")
+		}
+		lx.emit(itemEOF)
+		return nil
+	}
+
+	// At this point, the only valid item can be a key, so we back up
+	// and let the key lexer do the rest.
+	lx.backup()
+	lx.push(lexTopEnd)
+	return lexKeyStart
+}
+
+// lexTopEnd is entered whenever a top-level item has been consumed. (A value
+// or a table.) It must see only whitespace, and will turn back to lexTop
+// upon a newline. If it sees EOF, it will quit the lexer successfully.
+func lexTopEnd(lx *lexer) stateFn {
+	r := lx.next()
+	switch {
+	case r == commentStart:
+		// a comment will read to a newline for us.
+		lx.push(lexTop)
+		return lexCommentStart
+	case isWhitespace(r):
+		return lexTopEnd
+	case isNL(r):
+		lx.ignore()
+		return lexTop
+	case r == eof:
+		lx.emit(itemEOF)
+		return nil
+	}
+	return lx.errorf("expected a top-level item to end with a newline, "+
+		"comment, or EOF, but got %q instead", r)
+}
+
+// lexTable lexes the beginning of a table. Namely, it makes sure that
+// it starts with a character other than '.' and ']'.
+// It assumes that '[' has already been consumed.
+// It also handles the case that this is an item in an array of tables.
+// e.g., '[[name]]'.
+func lexTableStart(lx *lexer) stateFn {
+	if lx.peek() == arrayTableStart {
+		lx.next()
+		lx.emit(itemArrayTableStart)
+		lx.push(lexArrayTableEnd)
+	} else {
+		lx.emit(itemTableStart)
+		lx.push(lexTableEnd)
+	}
+	return lexTableNameStart
+}
+
+func lexTableEnd(lx *lexer) stateFn {
+	lx.emit(itemTableEnd)
+	return lexTopEnd
+}
+
+func lexArrayTableEnd(lx *lexer) stateFn {
+	if r := lx.next(); r != arrayTableEnd {
+		return lx.errorf("expected end of table array name delimiter %q, "+
+			"but got %q instead", arrayTableEnd, r)
+	}
+	lx.emit(itemArrayTableEnd)
+	return lexTopEnd
+}
+
+func lexTableNameStart(lx *lexer) stateFn {
+	lx.skip(isWhitespace)
+	switch r := lx.peek(); {
+	case r == tableEnd || r == eof:
+		return lx.errorf("unexpected end of table name " +
+			"(table names cannot be empty)")
+	case r == tableSep:
+		return lx.errorf("unexpected table separator " +
+			"(table names cannot be empty)")
+	case r == stringStart || r == rawStringStart:
+		lx.ignore()
+		lx.push(lexTableNameEnd)
+		return lexValue // reuse string lexing
+	default:
+		return lexBareTableName
+	}
+}
+
+// lexBareTableName lexes the name of a table. It assumes that at least one
+// valid character for the table has already been read.
+func lexBareTableName(lx *lexer) stateFn {
+	r := lx.next()
+	if isBareKeyChar(r) {
+		return lexBareTableName
+	}
+	lx.backup()
+	lx.emit(itemText)
+	return lexTableNameEnd
+}
+
+// lexTableNameEnd reads the end of a piece of a table name, optionally
+// consuming whitespace.
+func lexTableNameEnd(lx *lexer) stateFn {
+	lx.skip(isWhitespace)
+	switch r := lx.next(); {
+	case isWhitespace(r):
+		return lexTableNameEnd
+	case r == tableSep:
+		lx.ignore()
+		return lexTableNameStart
+	case r == tableEnd:
+		return lx.pop()
+	default:
+		return lx.errorf("expected '.' or ']' to end table name, "+
+			"but got %q instead", r)
+	}
+}
+
+// lexKeyStart consumes a key name up until the first non-whitespace character.
+// lexKeyStart will ignore whitespace.
+func lexKeyStart(lx *lexer) stateFn {
+	r := lx.peek()
+	switch {
+	case r == keySep:
+		return lx.errorf("unexpected key separator %q", keySep)
+	case isWhitespace(r) || isNL(r):
+		lx.next()
+		return lexSkip(lx, lexKeyStart)
+	case r == stringStart || r == rawStringStart:
+		lx.ignore()
+		lx.emit(itemKeyStart)
+		lx.push(lexKeyEnd)
+		return lexValue // reuse string lexing
+	default:
+		lx.ignore()
+		lx.emit(itemKeyStart)
+		return lexBareKey
+	}
+}
+
+// lexBareKey consumes the text of a bare key. Assumes that the first character
+// (which is not whitespace) has not yet been consumed.
+func lexBareKey(lx *lexer) stateFn {
+	switch r := lx.next(); {
+	case isBareKeyChar(r):
+		return lexBareKey
+	case isWhitespace(r):
+		lx.backup()
+		lx.emit(itemText)
+		return lexKeyEnd
+	case r == keySep:
+		lx.backup()
+		lx.emit(itemText)
+		return lexKeyEnd
+	default:
+		return lx.errorf("bare keys cannot contain %q", r)
+	}
+}
+
+// lexKeyEnd consumes the end of a key and trims whitespace (up to the key
+// separator).
+func lexKeyEnd(lx *lexer) stateFn {
+	switch r := lx.next(); {
+	case r == keySep:
+		return lexSkip(lx, lexValue)
+	case isWhitespace(r):
+		return lexSkip(lx, lexKeyEnd)
+	default:
+		return lx.errorf("expected key separator %q, but got %q instead",
+			keySep, r)
+	}
+}
+
+// lexValue starts the consumption of a value anywhere a value is expected.
+// lexValue will ignore whitespace.
+// After a value is lexed, the last state on the next is popped and returned.
+func lexValue(lx *lexer) stateFn {
+	// We allow whitespace to precede a value, but NOT newlines.
+	// In array syntax, the array states are responsible for ignoring newlines.
+	r := lx.next()
+	switch {
+	case isWhitespace(r):
+		return lexSkip(lx, lexValue)
+	case isDigit(r):
+		lx.backup() // avoid an extra state and use the same as above
+		return lexNumberOrDateStart
+	}
+	switch r {
+	case arrayStart:
+		lx.ignore()
+		lx.emit(itemArray)
+		return lexArrayValue
+	case inlineTableStart:
+		lx.ignore()
+		lx.emit(itemInlineTableStart)
+		return lexInlineTableValue
+	case stringStart:
+		if lx.accept(stringStart) {
+			if lx.accept(stringStart) {
+				lx.ignore() // Ignore """
+				return lexMultilineString
+			}
+			lx.backup()
+		}
+		lx.ignore() // ignore the '"'
+		return lexString
+	case rawStringStart:
+		if lx.accept(rawStringStart) {
+			if lx.accept(rawStringStart) {
+				lx.ignore() // Ignore """
+				return lexMultilineRawString
+			}
+			lx.backup()
+		}
+		lx.ignore() // ignore the "'"
+		return lexRawString
+	case '+', '-':
+		return lexNumberStart
+	case '.': // special error case, be kind to users
+		return lx.errorf("floats must start with a digit, not '.'")
+	}
+	if unicode.IsLetter(r) {
+		// Be permissive here; lexBool will give a nice error if the
+		// user wrote something like
+		//   x = foo
+		// (i.e. not 'true' or 'false' but is something else word-like.)
+		lx.backup()
+		return lexBool
+	}
+	return lx.errorf("expected value but found %q instead", r)
+}
+
+// lexArrayValue consumes one value in an array. It assumes that '[' or ','
+// have already been consumed. All whitespace and newlines are ignored.
+func lexArrayValue(lx *lexer) stateFn {
+	r := lx.next()
+	switch {
+	case isWhitespace(r) || isNL(r):
+		return lexSkip(lx, lexArrayValue)
+	case r == commentStart:
+		lx.push(lexArrayValue)
+		return lexCommentStart
+	case r == comma:
+		return lx.errorf("unexpected comma")
+	case r == arrayEnd:
+		// NOTE(caleb): The spec isn't clear about whether you can have
+		// a trailing comma or not, so we'll allow it.
+		return lexArrayEnd
+	}
+
+	lx.backup()
+	lx.push(lexArrayValueEnd)
+	return lexValue
+}
+
+// lexArrayValueEnd consumes everything between the end of an array value and
+// the next value (or the end of the array): it ignores whitespace and newlines
+// and expects either a ',' or a ']'.
+func lexArrayValueEnd(lx *lexer) stateFn {
+	r := lx.next()
+	switch {
+	case isWhitespace(r) || isNL(r):
+		return lexSkip(lx, lexArrayValueEnd)
+	case r == commentStart:
+		lx.push(lexArrayValueEnd)
+		return lexCommentStart
+	case r == comma:
+		lx.ignore()
+		return lexArrayValue // move on to the next value
+	case r == arrayEnd:
+		return lexArrayEnd
+	}
+	return lx.errorf(
+		"expected a comma or array terminator %q, but got %q instead",
+		arrayEnd, r,
+	)
+}
+
+// lexArrayEnd finishes the lexing of an array.
+// It assumes that a ']' has just been consumed.
+func lexArrayEnd(lx *lexer) stateFn {
+	lx.ignore()
+	lx.emit(itemArrayEnd)
+	return lx.pop()
+}
+
+// lexInlineTableValue consumes one key/value pair in an inline table.
+// It assumes that '{' or ',' have already been consumed. Whitespace is ignored.
+func lexInlineTableValue(lx *lexer) stateFn {
+	r := lx.next()
+	switch {
+	case isWhitespace(r):
+		return lexSkip(lx, lexInlineTableValue)
+	case isNL(r):
+		return lx.errorf("newlines not allowed within inline tables")
+	case r == commentStart:
+		lx.push(lexInlineTableValue)
+		return lexCommentStart
+	case r == comma:
+		return lx.errorf("unexpected comma")
+	case r == inlineTableEnd:
+		return lexInlineTableEnd
+	}
+	lx.backup()
+	lx.push(lexInlineTableValueEnd)
+	return lexKeyStart
+}
+
+// lexInlineTableValueEnd consumes everything between the end of an inline table
+// key/value pair and the next pair (or the end of the table):
+// it ignores whitespace and expects either a ',' or a '}'.
+func lexInlineTableValueEnd(lx *lexer) stateFn {
+	r := lx.next()
+	switch {
+	case isWhitespace(r):
+		return lexSkip(lx, lexInlineTableValueEnd)
+	case isNL(r):
+		return lx.errorf("newlines not allowed within inline tables")
+	case r == commentStart:
+		lx.push(lexInlineTableValueEnd)
+		return lexCommentStart
+	case r == comma:
+		lx.ignore()
+		return lexInlineTableValue
+	case r == inlineTableEnd:
+		return lexInlineTableEnd
+	}
+	return lx.errorf("expected a comma or an inline table terminator %q, "+
+		"but got %q instead", inlineTableEnd, r)
+}
+
+// lexInlineTableEnd finishes the lexing of an inline table.
+// It assumes that a '}' has just been consumed.
+func lexInlineTableEnd(lx *lexer) stateFn {
+	lx.ignore()
+	lx.emit(itemInlineTableEnd)
+	return lx.pop()
+}
+
+// lexString consumes the inner contents of a string. It assumes that the
+// beginning '"' has already been consumed and ignored.
+func lexString(lx *lexer) stateFn {
+	r := lx.next()
+	switch {
+	case r == eof:
+		return lx.errorf("unexpected EOF")
+	case isNL(r):
+		return lx.errorf("strings cannot contain newlines")
+	case r == '\\':
+		lx.push(lexString)
+		return lexStringEscape
+	case r == stringEnd:
+		lx.backup()
+		lx.emit(itemString)
+		lx.next()
+		lx.ignore()
+		return lx.pop()
+	}
+	return lexString
+}
+
+// lexMultilineString consumes the inner contents of a string. It assumes that
+// the beginning '"""' has already been consumed and ignored.
+func lexMultilineString(lx *lexer) stateFn {
+	switch lx.next() {
+	case eof:
+		return lx.errorf("unexpected EOF")
+	case '\\':
+		return lexMultilineStringEscape
+	case stringEnd:
+		if lx.accept(stringEnd) {
+			if lx.accept(stringEnd) {
+				lx.backup()
+				lx.backup()
+				lx.backup()
+				lx.emit(itemMultilineString)
+				lx.next()
+				lx.next()
+				lx.next()
+				lx.ignore()
+				return lx.pop()
+			}
+			lx.backup()
+		}
+	}
+	return lexMultilineString
+}
+
+// lexRawString consumes a raw string. Nothing can be escaped in such a string.
+// It assumes that the beginning "'" has already been consumed and ignored.
+func lexRawString(lx *lexer) stateFn {
+	r := lx.next()
+	switch {
+	case r == eof:
+		return lx.errorf("unexpected EOF")
+	case isNL(r):
+		return lx.errorf("strings cannot contain newlines")
+	case r == rawStringEnd:
+		lx.backup()
+		lx.emit(itemRawString)
+		lx.next()
+		lx.ignore()
+		return lx.pop()
+	}
+	return lexRawString
+}
+
+// lexMultilineRawString consumes a raw string. Nothing can be escaped in such
+// a string. It assumes that the beginning "'''" has already been consumed and
+// ignored.
+func lexMultilineRawString(lx *lexer) stateFn {
+	switch lx.next() {
+	case eof:
+		return lx.errorf("unexpected EOF")
+	case rawStringEnd:
+		if lx.accept(rawStringEnd) {
+			if lx.accept(rawStringEnd) {
+				lx.backup()
+				lx.backup()
+				lx.backup()
+				lx.emit(itemRawMultilineString)
+				lx.next()
+				lx.next()
+				lx.next()
+				lx.ignore()
+				return lx.pop()
+			}
+			lx.backup()
+		}
+	}
+	return lexMultilineRawString
+}
+
+// lexMultilineStringEscape consumes an escaped character. It assumes that the
+// preceding '\\' has already been consumed.
+func lexMultilineStringEscape(lx *lexer) stateFn {
+	// Handle the special case first:
+	if isNL(lx.next()) {
+		return lexMultilineString
+	}
+	lx.backup()
+	lx.push(lexMultilineString)
+	return lexStringEscape(lx)
+}
+
+func lexStringEscape(lx *lexer) stateFn {
+	r := lx.next()
+	switch r {
+	case 'b':
+		fallthrough
+	case 't':
+		fallthrough
+	case 'n':
+		fallthrough
+	case 'f':
+		fallthrough
+	case 'r':
+		fallthrough
+	case '"':
+		fallthrough
+	case '\\':
+		return lx.pop()
+	case 'u':
+		return lexShortUnicodeEscape
+	case 'U':
+		return lexLongUnicodeEscape
+	}
+	return lx.errorf("invalid escape character %q; only the following "+
+		"escape characters are allowed: "+
+		`\b, \t, \n, \f, \r, \", \\, \uXXXX, and \UXXXXXXXX`, r)
+}
+
+func lexShortUnicodeEscape(lx *lexer) stateFn {
+	var r rune
+	for i := 0; i < 4; i++ {
+		r = lx.next()
+		if !isHexadecimal(r) {
+			return lx.errorf(`expected four hexadecimal digits after '\u', `+
+				"but got %q instead", lx.current())
+		}
+	}
+	return lx.pop()
+}
+
+func lexLongUnicodeEscape(lx *lexer) stateFn {
+	var r rune
+	for i := 0; i < 8; i++ {
+		r = lx.next()
+		if !isHexadecimal(r) {
+			return lx.errorf(`expected eight hexadecimal digits after '\U', `+
+				"but got %q instead", lx.current())
+		}
+	}
+	return lx.pop()
+}
+
+// lexNumberOrDateStart consumes either an integer, a float, or datetime.
+func lexNumberOrDateStart(lx *lexer) stateFn {
+	r := lx.next()
+	if isDigit(r) {
+		return lexNumberOrDate
+	}
+	switch r {
+	case '_':
+		return lexNumber
+	case 'e', 'E':
+		return lexFloat
+	case '.':
+		return lx.errorf("floats must start with a digit, not '.'")
+	}
+	return lx.errorf("expected a digit but got %q", r)
+}
+
+// lexNumberOrDate consumes either an integer, float or datetime.
+func lexNumberOrDate(lx *lexer) stateFn {
+	r := lx.next()
+	if isDigit(r) {
+		return lexNumberOrDate
+	}
+	switch r {
+	case '-':
+		return lexDatetime
+	case '_':
+		return lexNumber
+	case '.', 'e', 'E':
+		return lexFloat
+	}
+
+	lx.backup()
+	lx.emit(itemInteger)
+	return lx.pop()
+}
+
+// lexDatetime consumes a Datetime, to a first approximation.
+// The parser validates that it matches one of the accepted formats.
+func lexDatetime(lx *lexer) stateFn {
+	r := lx.next()
+	if isDigit(r) {
+		return lexDatetime
+	}
+	switch r {
+	case '-', 'T', ':', '.', 'Z', '+':
+		return lexDatetime
+	}
+
+	lx.backup()
+	lx.emit(itemDatetime)
+	return lx.pop()
+}
+
+// lexNumberStart consumes either an integer or a float. It assumes that a sign
+// has already been read, but that *no* digits have been consumed.
+// lexNumberStart will move to the appropriate integer or float states.
+func lexNumberStart(lx *lexer) stateFn {
+	// We MUST see a digit. Even floats have to start with a digit.
+	r := lx.next()
+	if !isDigit(r) {
+		if r == '.' {
+			return lx.errorf("floats must start with a digit, not '.'")
+		}
+		return lx.errorf("expected a digit but got %q", r)
+	}
+	return lexNumber
+}
+
+// lexNumber consumes an integer or a float after seeing the first digit.
+func lexNumber(lx *lexer) stateFn {
+	r := lx.next()
+	if isDigit(r) {
+		return lexNumber
+	}
+	switch r {
+	case '_':
+		return lexNumber
+	case '.', 'e', 'E':
+		return lexFloat
+	}
+
+	lx.backup()
+	lx.emit(itemInteger)
+	return lx.pop()
+}
+
+// lexFloat consumes the elements of a float. It allows any sequence of
+// float-like characters, so floats emitted by the lexer are only a first
+// approximation and must be validated by the parser.
+func lexFloat(lx *lexer) stateFn {
+	r := lx.next()
+	if isDigit(r) {
+		return lexFloat
+	}
+	switch r {
+	case '_', '.', '-', '+', 'e', 'E':
+		return lexFloat
+	}
+
+	lx.backup()
+	lx.emit(itemFloat)
+	return lx.pop()
+}
+
+// lexBool consumes a bool string: 'true' or 'false.
+func lexBool(lx *lexer) stateFn {
+	var rs []rune
+	for {
+		r := lx.next()
+		if !unicode.IsLetter(r) {
+			lx.backup()
+			break
+		}
+		rs = append(rs, r)
+	}
+	s := string(rs)
+	switch s {
+	case "true", "false":
+		lx.emit(itemBool)
+		return lx.pop()
+	}
+	return lx.errorf("expected value but found %q instead", s)
+}
+
+// lexCommentStart begins the lexing of a comment. It will emit
+// itemCommentStart and consume no characters, passing control to lexComment.
+func lexCommentStart(lx *lexer) stateFn {
+	lx.ignore()
+	lx.emit(itemCommentStart)
+	return lexComment
+}
+
+// lexComment lexes an entire comment. It assumes that '#' has been consumed.
+// It will consume *up to* the first newline character, and pass control
+// back to the last state on the stack.
+func lexComment(lx *lexer) stateFn {
+	r := lx.peek()
+	if isNL(r) || r == eof {
+		lx.emit(itemText)
+		return lx.pop()
+	}
+	lx.next()
+	return lexComment
+}
+
+// lexSkip ignores all slurped input and moves on to the next state.
+func lexSkip(lx *lexer, nextState stateFn) stateFn {
+	return func(lx *lexer) stateFn {
+		lx.ignore()
+		return nextState
+	}
+}
+
+// isWhitespace returns true if `r` is a whitespace character according
+// to the spec.
+func isWhitespace(r rune) bool {
+	return r == '\t' || r == ' '
+}
+
+func isNL(r rune) bool {
+	return r == '\n' || r == '\r'
+}
+
+func isDigit(r rune) bool {
+	return r >= '0' && r <= '9'
+}
+
+func isHexadecimal(r rune) bool {
+	return (r >= '0' && r <= '9') ||
+		(r >= 'a' && r <= 'f') ||
+		(r >= 'A' && r <= 'F')
+}
+
+func isBareKeyChar(r rune) bool {
+	return (r >= 'A' && r <= 'Z') ||
+		(r >= 'a' && r <= 'z') ||
+		(r >= '0' && r <= '9') ||
+		r == '_' ||
+		r == '-'
+}
+
+func (itype itemType) String() string {
+	switch itype {
+	case itemError:
+		return "Error"
+	case itemNIL:
+		return "NIL"
+	case itemEOF:
+		return "EOF"
+	case itemText:
+		return "Text"
+	case itemString, itemRawString, itemMultilineString, itemRawMultilineString:
+		return "String"
+	case itemBool:
+		return "Bool"
+	case itemInteger:
+		return "Integer"
+	case itemFloat:
+		return "Float"
+	case itemDatetime:
+		return "DateTime"
+	case itemTableStart:
+		return "TableStart"
+	case itemTableEnd:
+		return "TableEnd"
+	case itemKeyStart:
+		return "KeyStart"
+	case itemArray:
+		return "Array"
+	case itemArrayEnd:
+		return "ArrayEnd"
+	case itemCommentStart:
+		return "CommentStart"
+	}
+	panic(fmt.Sprintf("BUG: Unknown type '%d'.", int(itype)))
+}
+
+func (item item) String() string {
+	return fmt.Sprintf("(%s, %s)", item.typ.String(), item.val)
+}

vendor/github.com/BurntSushi/toml/parse.go

@@ -0,0 +1,592 @@
+package toml
+
+import (
+	"fmt"
+	"strconv"
+	"strings"
+	"time"
+	"unicode"
+	"unicode/utf8"
+)
+
+type parser struct {
+	mapping map[string]interface{}
+	types   map[string]tomlType
+	lx      *lexer
+
+	// A list of keys in the order that they appear in the TOML data.
+	ordered []Key
+
+	// the full key for the current hash in scope
+	context Key
+
+	// the base key name for everything except hashes
+	currentKey string
+
+	// rough approximation of line number
+	approxLine int
+
+	// A map of 'key.group.names' to whether they were created implicitly.
+	implicits map[string]bool
+}
+
+type parseError string
+
+func (pe parseError) Error() string {
+	return string(pe)
+}
+
+func parse(data string) (p *parser, err error) {
+	defer func() {
+		if r := recover(); r != nil {
+			var ok bool
+			if err, ok = r.(parseError); ok {
+				return
+			}
+			panic(r)
+		}
+	}()
+
+	p = &parser{
+		mapping:   make(map[string]interface{}),
+		types:     make(map[string]tomlType),
+		lx:        lex(data),
+		ordered:   make([]Key, 0),
+		implicits: make(map[string]bool),
+	}
+	for {
+		item := p.next()
+		if item.typ == itemEOF {
+			break
+		}
+		p.topLevel(item)
+	}
+
+	return p, nil
+}
+
+func (p *parser) panicf(format string, v ...interface{}) {
+	msg := fmt.Sprintf("Near line %d (last key parsed '%s'): %s",
+		p.approxLine, p.current(), fmt.Sprintf(format, v...))
+	panic(parseError(msg))
+}
+
+func (p *parser) next() item {
+	it := p.lx.nextItem()
+	if it.typ == itemError {
+		p.panicf("%s", it.val)
+	}
+	return it
+}
+
+func (p *parser) bug(format string, v ...interface{}) {
+	panic(fmt.Sprintf("BUG: "+format+"\n\n", v...))
+}
+
+func (p *parser) expect(typ itemType) item {
+	it := p.next()
+	p.assertEqual(typ, it.typ)
+	return it
+}
+
+func (p *parser) assertEqual(expected, got itemType) {
+	if expected != got {
+		p.bug("Expected '%s' but got '%s'.", expected, got)
+	}
+}
+
+func (p *parser) topLevel(item item) {
+	switch item.typ {
+	case itemCommentStart:
+		p.approxLine = item.line
+		p.expect(itemText)
+	case itemTableStart:
+		kg := p.next()
+		p.approxLine = kg.line
+
+		var key Key
+		for ; kg.typ != itemTableEnd && kg.typ != itemEOF; kg = p.next() {
+			key = append(key, p.keyString(kg))
+		}
+		p.assertEqual(itemTableEnd, kg.typ)
+
+		p.establishContext(key, false)
+		p.setType("", tomlHash)
+		p.ordered = append(p.ordered, key)
+	case itemArrayTableStart:
+		kg := p.next()
+		p.approxLine = kg.line
+
+		var key Key
+		for ; kg.typ != itemArrayTableEnd && kg.typ != itemEOF; kg = p.next() {
+			key = append(key, p.keyString(kg))
+		}
+		p.assertEqual(itemArrayTableEnd, kg.typ)
+
+		p.establishContext(key, true)
+		p.setType("", tomlArrayHash)
+		p.ordered = append(p.ordered, key)
+	case itemKeyStart:
+		kname := p.next()
+		p.approxLine = kname.line
+		p.currentKey = p.keyString(kname)
+
+		val, typ := p.value(p.next())
+		p.setValue(p.currentKey, val)
+		p.setType(p.currentKey, typ)
+		p.ordered = append(p.ordered, p.context.add(p.currentKey))
+		p.currentKey = ""
+	default:
+		p.bug("Unexpected type at top level: %s", item.typ)
+	}
+}
+
+// Gets a string for a key (or part of a key in a table name).
+func (p *parser) keyString(it item) string {
+	switch it.typ {
+	case itemText:
+		return it.val
+	case itemString, itemMultilineString,
+		itemRawString, itemRawMultilineString:
+		s, _ := p.value(it)
+		return s.(string)
+	default:
+		p.bug("Unexpected key type: %s", it.typ)
+		panic("unreachable")
+	}
+}
+
+// value translates an expected value from the lexer into a Go value wrapped
+// as an empty interface.
+func (p *parser) value(it item) (interface{}, tomlType) {
+	switch it.typ {
+	case itemString:
+		return p.replaceEscapes(it.val), p.typeOfPrimitive(it)
+	case itemMultilineString:
+		trimmed := stripFirstNewline(stripEscapedWhitespace(it.val))
+		return p.replaceEscapes(trimmed), p.typeOfPrimitive(it)
+	case itemRawString:
+		return it.val, p.typeOfPrimitive(it)
+	case itemRawMultilineString:
+		return stripFirstNewline(it.val), p.typeOfPrimitive(it)
+	case itemBool:
+		switch it.val {
+		case "true":
+			return true, p.typeOfPrimitive(it)
+		case "false":
+			return false, p.typeOfPrimitive(it)
+		}
+		p.bug("Expected boolean value, but got '%s'.", it.val)
+	case itemInteger:
+		if !numUnderscoresOK(it.val) {
+			p.panicf("Invalid integer %q: underscores must be surrounded by digits",
+				it.val)
+		}
+		val := strings.Replace(it.val, "_", "", -1)
+		num, err := strconv.ParseInt(val, 10, 64)
+		if err != nil {
+			// Distinguish integer values. Normally, it'd be a bug if the lexer
+			// provides an invalid integer, but it's possible that the number is
+			// out of range of valid values (which the lexer cannot determine).
+			// So mark the former as a bug but the latter as a legitimate user
+			// error.
+			if e, ok := err.(*strconv.NumError); ok &&
+				e.Err == strconv.ErrRange {
+
+				p.panicf("Integer '%s' is out of the range of 64-bit "+
+					"signed integers.", it.val)
+			} else {
+				p.bug("Expected integer value, but got '%s'.", it.val)
+			}
+		}
+		return num, p.typeOfPrimitive(it)
+	case itemFloat:
+		parts := strings.FieldsFunc(it.val, func(r rune) bool {
+			switch r {
+			case '.', 'e', 'E':
+				return true
+			}
+			return false
+		})
+		for _, part := range parts {
+			if !numUnderscoresOK(part) {
+				p.panicf("Invalid float %q: underscores must be "+
+					"surrounded by digits", it.val)
+			}
+		}
+		if !numPeriodsOK(it.val) {
+			// As a special case, numbers like '123.' or '1.e2',
+			// which are valid as far as Go/strconv are concerned,
+			// must be rejected because TOML says that a fractional
+			// part consists of '.' followed by 1+ digits.
+			p.panicf("Invalid float %q: '.' must be followed "+
+				"by one or more digits", it.val)
+		}
+		val := strings.Replace(it.val, "_", "", -1)
+		num, err := strconv.ParseFloat(val, 64)
+		if err != nil {
+			if e, ok := err.(*strconv.NumError); ok &&
+				e.Err == strconv.ErrRange {
+
+				p.panicf("Float '%s' is out of the range of 64-bit "+
+					"IEEE-754 floating-point numbers.", it.val)
+			} else {
+				p.panicf("Invalid float value: %q", it.val)
+			}
+		}
+		return num, p.typeOfPrimitive(it)
+	case itemDatetime:
+		var t time.Time
+		var ok bool
+		var err error
+		for _, format := range []string{
+			"2006-01-02T15:04:05Z07:00",
+			"2006-01-02T15:04:05",
+			"2006-01-02",
+		} {
+			t, err = time.ParseInLocation(format, it.val, time.Local)
+			if err == nil {
+				ok = true
+				break
+			}
+		}
+		if !ok {
+			p.panicf("Invalid TOML Datetime: %q.", it.val)
+		}
+		return t, p.typeOfPrimitive(it)
+	case itemArray:
+		array := make([]interface{}, 0)
+		types := make([]tomlType, 0)
+
+		for it = p.next(); it.typ != itemArrayEnd; it = p.next() {
+			if it.typ == itemCommentStart {
+				p.expect(itemText)
+				continue
+			}
+
+			val, typ := p.value(it)
+			array = append(array, val)
+			types = append(types, typ)
+		}
+		return array, p.typeOfArray(types)
+	case itemInlineTableStart:
+		var (
+			hash         = make(map[string]interface{})
+			outerContext = p.context
+			outerKey     = p.currentKey
+		)
+
+		p.context = append(p.context, p.currentKey)
+		p.currentKey = ""
+		for it := p.next(); it.typ != itemInlineTableEnd; it = p.next() {
+			if it.typ != itemKeyStart {
+				p.bug("Expected key start but instead found %q, around line %d",
+					it.val, p.approxLine)
+			}
+			if it.typ == itemCommentStart {
+				p.expect(itemText)
+				continue
+			}
+
+			// retrieve key
+			k := p.next()
+			p.approxLine = k.line
+			kname := p.keyString(k)
+
+			// retrieve value
+			p.currentKey = kname
+			val, typ := p.value(p.next())
+			// make sure we keep metadata up to date
+			p.setType(kname, typ)
+			p.ordered = append(p.ordered, p.context.add(p.currentKey))
+			hash[kname] = val
+		}
+		p.context = outerContext
+		p.currentKey = outerKey
+		return hash, tomlHash
+	}
+	p.bug("Unexpected value type: %s", it.typ)
+	panic("unreachable")
+}
+
+// numUnderscoresOK checks whether each underscore in s is surrounded by
+// characters that are not underscores.
+func numUnderscoresOK(s string) bool {
+	accept := false
+	for _, r := range s {
+		if r == '_' {
+			if !accept {
+				return false
+			}
+			accept = false
+			continue
+		}
+		accept = true
+	}
+	return accept
+}
+
+// numPeriodsOK checks whether every period in s is followed by a digit.
+func numPeriodsOK(s string) bool {
+	period := false
+	for _, r := range s {
+		if period && !isDigit(r) {
+			return false
+		}
+		period = r == '.'
+	}
+	return !period
+}
+
+// establishContext sets the current context of the parser,
+// where the context is either a hash or an array of hashes. Which one is
+// set depends on the value of the `array` parameter.
+//
+// Establishing the context also makes sure that the key isn't a duplicate, and
+// will create implicit hashes automatically.
+func (p *parser) establishContext(key Key, array bool) {
+	var ok bool
+
+	// Always start at the top level and drill down for our context.
+	hashContext := p.mapping
+	keyContext := make(Key, 0)
+
+	// We only need implicit hashes for key[0:-1]
+	for _, k := range key[0 : len(key)-1] {
+		_, ok = hashContext[k]
+		keyContext = append(keyContext, k)
+
+		// No key? Make an implicit hash and move on.
+		if !ok {
+			p.addImplicit(keyContext)
+			hashContext[k] = make(map[string]interface{})
+		}
+
+		// If the hash context is actually an array of tables, then set
+		// the hash context to the last element in that array.
+		//
+		// Otherwise, it better be a table, since this MUST be a key group (by
+		// virtue of it not being the last element in a key).
+		switch t := hashContext[k].(type) {
+		case []map[string]interface{}:
+			hashContext = t[len(t)-1]
+		case map[string]interface{}:
+			hashContext = t
+		default:
+			p.panicf("Key '%s' was already created as a hash.", keyContext)
+		}
+	}
+
+	p.context = keyContext
+	if array {
+		// If this is the first element for this array, then allocate a new
+		// list of tables for it.
+		k := key[len(key)-1]
+		if _, ok := hashContext[k]; !ok {
+			hashContext[k] = make([]map[string]interface{}, 0, 5)
+		}
+
+		// Add a new table. But make sure the key hasn't already been used
+		// for something else.
+		if hash, ok := hashContext[k].([]map[string]interface{}); ok {
+			hashContext[k] = append(hash, make(map[string]interface{}))
+		} else {
+			p.panicf("Key '%s' was already created and cannot be used as "+
+				"an array.", keyContext)
+		}
+	} else {
+		p.setValue(key[len(key)-1], make(map[string]interface{}))
+	}
+	p.context = append(p.context, key[len(key)-1])
+}
+
+// setValue sets the given key to the given value in the current context.
+// It will make sure that the key hasn't already been defined, account for
+// implicit key groups.
+func (p *parser) setValue(key string, value interface{}) {
+	var tmpHash interface{}
+	var ok bool
+
+	hash := p.mapping
+	keyContext := make(Key, 0)
+	for _, k := range p.context {
+		keyContext = append(keyContext, k)
+		if tmpHash, ok = hash[k]; !ok {
+			p.bug("Context for key '%s' has not been established.", keyContext)
+		}
+		switch t := tmpHash.(type) {
+		case []map[string]interface{}:
+			// The context is a table of hashes. Pick the most recent table
+			// defined as the current hash.
+			hash = t[len(t)-1]
+		case map[string]interface{}:
+			hash = t
+		default:
+			p.bug("Expected hash to have type 'map[string]interface{}', but "+
+				"it has '%T' instead.", tmpHash)
+		}
+	}
+	keyContext = append(keyContext, key)
+
+	if _, ok := hash[key]; ok {
+		// Typically, if the given key has already been set, then we have
+		// to raise an error since duplicate keys are disallowed. However,
+		// it's possible that a key was previously defined implicitly. In this
+		// case, it is allowed to be redefined concretely. (See the
+		// `tests/valid/implicit-and-explicit-after.toml` test in `toml-test`.)
+		//
+		// But we have to make sure to stop marking it as an implicit. (So that
+		// another redefinition provokes an error.)
+		//
+		// Note that since it has already been defined (as a hash), we don't
+		// want to overwrite it. So our business is done.
+		if p.isImplicit(keyContext) {
+			p.removeImplicit(keyContext)
+			return
+		}
+
+		// Otherwise, we have a concrete key trying to override a previous
+		// key, which is *always* wrong.
+		p.panicf("Key '%s' has already been defined.", keyContext)
+	}
+	hash[key] = value
+}
+
+// setType sets the type of a particular value at a given key.
+// It should be called immediately AFTER setValue.
+//
+// Note that if `key` is empty, then the type given will be applied to the
+// current context (which is either a table or an array of tables).
+func (p *parser) setType(key string, typ tomlType) {
+	keyContext := make(Key, 0, len(p.context)+1)
+	for _, k := range p.context {
+		keyContext = append(keyContext, k)
+	}
+	if len(key) > 0 { // allow type setting for hashes
+		keyContext = append(keyContext, key)
+	}
+	p.types[keyContext.String()] = typ
+}
+
+// addImplicit sets the given Key as having been created implicitly.
+func (p *parser) addImplicit(key Key) {
+	p.implicits[key.String()] = true
+}
+
+// removeImplicit stops tagging the given key as having been implicitly
+// created.
+func (p *parser) removeImplicit(key Key) {
+	p.implicits[key.String()] = false
+}
+
+// isImplicit returns true if the key group pointed to by the key was created
+// implicitly.
+func (p *parser) isImplicit(key Key) bool {
+	return p.implicits[key.String()]
+}
+
+// current returns the full key name of the current context.
+func (p *parser) current() string {
+	if len(p.currentKey) == 0 {
+		return p.context.String()
+	}
+	if len(p.context) == 0 {
+		return p.currentKey
+	}
+	return fmt.Sprintf("%s.%s", p.context, p.currentKey)
+}
+
+func stripFirstNewline(s string) string {
+	if len(s) == 0 || s[0] != '\n' {
+		return s
+	}
+	return s[1:]
+}
+
+func stripEscapedWhitespace(s string) string {
+	esc := strings.Split(s, "\\\n")
+	if len(esc) > 1 {
+		for i := 1; i < len(esc); i++ {
+			esc[i] = strings.TrimLeftFunc(esc[i], unicode.IsSpace)
+		}
+	}
+	return strings.Join(esc, "")
+}
+
+func (p *parser) replaceEscapes(str string) string {
+	var replaced []rune
+	s := []byte(str)
+	r := 0
+	for r < len(s) {
+		if s[r] != '\\' {
+			c, size := utf8.DecodeRune(s[r:])
+			r += size
+			replaced = append(replaced, c)
+			continue
+		}
+		r += 1
+		if r >= len(s) {
+			p.bug("Escape sequence at end of string.")
+			return ""
+		}
+		switch s[r] {
+		default:
+			p.bug("Expected valid escape code after \\, but got %q.", s[r])
+			return ""
+		case 'b':
+			replaced = append(replaced, rune(0x0008))
+			r += 1
+		case 't':
+			replaced = append(replaced, rune(0x0009))
+			r += 1
+		case 'n':
+			replaced = append(replaced, rune(0x000A))
+			r += 1
+		case 'f':
+			replaced = append(replaced, rune(0x000C))
+			r += 1
+		case 'r':
+			replaced = append(replaced, rune(0x000D))
+			r += 1
+		case '"':
+			replaced = append(replaced, rune(0x0022))
+			r += 1
+		case '\\':
+			replaced = append(replaced, rune(0x005C))
+			r += 1
+		case 'u':
+			// At this point, we know we have a Unicode escape of the form
+			// `uXXXX` at [r, r+5). (Because the lexer guarantees this
+			// for us.)
+			escaped := p.asciiEscapeToUnicode(s[r+1 : r+5])
+			replaced = append(replaced, escaped)
+			r += 5
+		case 'U':
+			// At this point, we know we have a Unicode escape of the form
+			// `uXXXX` at [r, r+9). (Because the lexer guarantees this
+			// for us.)
+			escaped := p.asciiEscapeToUnicode(s[r+1 : r+9])
+			replaced = append(replaced, escaped)
+			r += 9
+		}
+	}
+	return string(replaced)
+}
+
+func (p *parser) asciiEscapeToUnicode(bs []byte) rune {
+	s := string(bs)
+	hex, err := strconv.ParseUint(strings.ToLower(s), 16, 32)
+	if err != nil {
+		p.bug("Could not parse '%s' as a hexadecimal number, but the "+
+			"lexer claims it's OK: %s", s, err)
+	}
+	if !utf8.ValidRune(rune(hex)) {
+		p.panicf("Escaped character '\\u%s' is not valid UTF-8.", s)
+	}
+	return rune(hex)
+}
+
+func isStringType(ty itemType) bool {
+	return ty == itemString || ty == itemMultilineString ||
+		ty == itemRawString || ty == itemRawMultilineString
+}

vendor/github.com/BurntSushi/toml/session.vim

@@ -0,0 +1 @@
+au BufWritePost *.go silent!make tags > /dev/null 2>&1

vendor/github.com/BurntSushi/toml/type_check.go

@@ -0,0 +1,91 @@
+package toml
+
+// tomlType represents any Go type that corresponds to a TOML type.
+// While the first draft of the TOML spec has a simplistic type system that
+// probably doesn't need this level of sophistication, we seem to be militating
+// toward adding real composite types.
+type tomlType interface {
+	typeString() string
+}
+
+// typeEqual accepts any two types and returns true if they are equal.
+func typeEqual(t1, t2 tomlType) bool {
+	if t1 == nil || t2 == nil {
+		return false
+	}
+	return t1.typeString() == t2.typeString()
+}
+
+func typeIsHash(t tomlType) bool {
+	return typeEqual(t, tomlHash) || typeEqual(t, tomlArrayHash)
+}
+
+type tomlBaseType string
+
+func (btype tomlBaseType) typeString() string {
+	return string(btype)
+}
+
+func (btype tomlBaseType) String() string {
+	return btype.typeString()
+}
+
+var (
+	tomlInteger   tomlBaseType = "Integer"
+	tomlFloat     tomlBaseType = "Float"
+	tomlDatetime  tomlBaseType = "Datetime"
+	tomlString    tomlBaseType = "String"
+	tomlBool      tomlBaseType = "Bool"
+	tomlArray     tomlBaseType = "Array"
+	tomlHash      tomlBaseType = "Hash"
+	tomlArrayHash tomlBaseType = "ArrayHash"
+)
+
+// typeOfPrimitive returns a tomlType of any primitive value in TOML.
+// Primitive values are: Integer, Float, Datetime, String and Bool.
+//
+// Passing a lexer item other than the following will cause a BUG message
+// to occur: itemString, itemBool, itemInteger, itemFloat, itemDatetime.
+func (p *parser) typeOfPrimitive(lexItem item) tomlType {
+	switch lexItem.typ {
+	case itemInteger:
+		return tomlInteger
+	case itemFloat:
+		return tomlFloat
+	case itemDatetime:
+		return tomlDatetime
+	case itemString:
+		return tomlString
+	case itemMultilineString:
+		return tomlString
+	case itemRawString:
+		return tomlString
+	case itemRawMultilineString:
+		return tomlString
+	case itemBool:
+		return tomlBool
+	}
+	p.bug("Cannot infer primitive type of lex item '%s'.", lexItem)
+	panic("unreachable")
+}
+
+// typeOfArray returns a tomlType for an array given a list of types of its
+// values.
+//
+// In the current spec, if an array is homogeneous, then its type is always
+// "Array". If the array is not homogeneous, an error is generated.
+func (p *parser) typeOfArray(types []tomlType) tomlType {
+	// Empty arrays are cool.
+	if len(types) == 0 {
+		return tomlArray
+	}
+
+	theType := types[0]
+	for _, t := range types[1:] {
+		if !typeEqual(theType, t) {
+			p.panicf("Array contains values of type '%s' and '%s', but "+
+				"arrays must be homogeneous.", theType, t)
+		}
+	}
+	return tomlArray
+}

vendor/github.com/BurntSushi/toml/type_fields.go

@@ -0,0 +1,242 @@
+package toml
+
+// Struct field handling is adapted from code in encoding/json:
+//
+// Copyright 2010 The Go Authors.  All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the Go distribution.
+
+import (
+	"reflect"
+	"sort"
+	"sync"
+)
+
+// A field represents a single field found in a struct.
+type field struct {
+	name  string       // the name of the field (`toml` tag included)
+	tag   bool         // whether field has a `toml` tag
+	index []int        // represents the depth of an anonymous field
+	typ   reflect.Type // the type of the field
+}
+
+// byName sorts field by name, breaking ties with depth,
+// then breaking ties with "name came from toml tag", then
+// breaking ties with index sequence.
+type byName []field
+
+func (x byName) Len() int { return len(x) }
+
+func (x byName) Swap(i, j int) { x[i], x[j] = x[j], x[i] }
+
+func (x byName) Less(i, j int) bool {
+	if x[i].name != x[j].name {
+		return x[i].name < x[j].name
+	}
+	if len(x[i].index) != len(x[j].index) {
+		return len(x[i].index) < len(x[j].index)
+	}
+	if x[i].tag != x[j].tag {
+		return x[i].tag
+	}
+	return byIndex(x).Less(i, j)
+}
+
+// byIndex sorts field by index sequence.
+type byIndex []field
+
+func (x byIndex) Len() int { return len(x) }
+
+func (x byIndex) Swap(i, j int) { x[i], x[j] = x[j], x[i] }
+
+func (x byIndex) Less(i, j int) bool {
+	for k, xik := range x[i].index {
+		if k >= len(x[j].index) {
+			return false
+		}
+		if xik != x[j].index[k] {
+			return xik < x[j].index[k]
+		}
+	}
+	return len(x[i].index) < len(x[j].index)
+}
+
+// typeFields returns a list of fields that TOML should recognize for the given
+// type. The algorithm is breadth-first search over the set of structs to
+// include - the top struct and then any reachable anonymous structs.
+func typeFields(t reflect.Type) []field {
+	// Anonymous fields to explore at the current level and the next.
+	current := []field{}
+	next := []field{{typ: t}}
+
+	// Count of queued names for current level and the next.
+	count := map[reflect.Type]int{}
+	nextCount := map[reflect.Type]int{}
+
+	// Types already visited at an earlier level.
+	visited := map[reflect.Type]bool{}
+
+	// Fields found.
+	var fields []field
+
+	for len(next) > 0 {
+		current, next = next, current[:0]
+		count, nextCount = nextCount, map[reflect.Type]int{}
+
+		for _, f := range current {
+			if visited[f.typ] {
+				continue
+			}
+			visited[f.typ] = true
+
+			// Scan f.typ for fields to include.
+			for i := 0; i < f.typ.NumField(); i++ {
+				sf := f.typ.Field(i)
+				if sf.PkgPath != "" && !sf.Anonymous { // unexported
+					continue
+				}
+				opts := getOptions(sf.Tag)
+				if opts.skip {
+					continue
+				}
+				index := make([]int, len(f.index)+1)
+				copy(index, f.index)
+				index[len(f.index)] = i
+
+				ft := sf.Type
+				if ft.Name() == "" && ft.Kind() == reflect.Ptr {
+					// Follow pointer.
+					ft = ft.Elem()
+				}
+
+				// Record found field and index sequence.
+				if opts.name != "" || !sf.Anonymous || ft.Kind() != reflect.Struct {
+					tagged := opts.name != ""
+					name := opts.name
+					if name == "" {
+						name = sf.Name
+					}
+					fields = append(fields, field{name, tagged, index, ft})
+					if count[f.typ] > 1 {
+						// If there were multiple instances, add a second,
+						// so that the annihilation code will see a duplicate.
+						// It only cares about the distinction between 1 or 2,
+						// so don't bother generating any more copies.
+						fields = append(fields, fields[len(fields)-1])
+					}
+					continue
+				}
+
+				// Record new anonymous struct to explore in next round.
+				nextCount[ft]++
+				if nextCount[ft] == 1 {
+					f := field{name: ft.Name(), index: index, typ: ft}
+					next = append(next, f)
+				}
+			}
+		}
+	}
+
+	sort.Sort(byName(fields))
+
+	// Delete all fields that are hidden by the Go rules for embedded fields,
+	// except that fields with TOML tags are promoted.
+
+	// The fields are sorted in primary order of name, secondary order
+	// of field index length. Loop over names; for each name, delete
+	// hidden fields by choosing the one dominant field that survives.
+	out := fields[:0]
+	for advance, i := 0, 0; i < len(fields); i += advance {
+		// One iteration per name.
+		// Find the sequence of fields with the name of this first field.
+		fi := fields[i]
+		name := fi.name
+		for advance = 1; i+advance < len(fields); advance++ {
+			fj := fields[i+advance]
+			if fj.name != name {
+				break
+			}
+		}
+		if advance == 1 { // Only one field with this name
+			out = append(out, fi)
+			continue
+		}
+		dominant, ok := dominantField(fields[i : i+advance])
+		if ok {
+			out = append(out, dominant)
+		}
+	}
+
+	fields = out
+	sort.Sort(byIndex(fields))
+
+	return fields
+}
+
+// dominantField looks through the fields, all of which are known to
+// have the same name, to find the single field that dominates the
+// others using Go's embedding rules, modified by the presence of
+// TOML tags. If there are multiple top-level fields, the boolean
+// will be false: This condition is an error in Go and we skip all
+// the fields.
+func dominantField(fields []field) (field, bool) {
+	// The fields are sorted in increasing index-length order. The winner
+	// must therefore be one with the shortest index length. Drop all
+	// longer entries, which is easy: just truncate the slice.
+	length := len(fields[0].index)
+	tagged := -1 // Index of first tagged field.
+	for i, f := range fields {
+		if len(f.index) > length {
+			fields = fields[:i]
+			break
+		}
+		if f.tag {
+			if tagged >= 0 {
+				// Multiple tagged fields at the same level: conflict.
+				// Return no field.
+				return field{}, false
+			}
+			tagged = i
+		}
+	}
+	if tagged >= 0 {
+		return fields[tagged], true
+	}
+	// All remaining fields have the same length. If there's more than one,
+	// we have a conflict (two fields named "X" at the same level) and we
+	// return no field.
+	if len(fields) > 1 {
+		return field{}, false
+	}
+	return fields[0], true
+}
+
+var fieldCache struct {
+	sync.RWMutex
+	m map[reflect.Type][]field
+}
+
+// cachedTypeFields is like typeFields but uses a cache to avoid repeated work.
+func cachedTypeFields(t reflect.Type) []field {
+	fieldCache.RLock()
+	f := fieldCache.m[t]
+	fieldCache.RUnlock()
+	if f != nil {
+		return f
+	}
+
+	// Compute fields without lock.
+	// Might duplicate effort but won't hold other computations back.
+	f = typeFields(t)
+	if f == nil {
+		f = []field{}
+	}
+
+	fieldCache.Lock()
+	if fieldCache.m == nil {
+		fieldCache.m = map[reflect.Type][]field{}
+	}
+	fieldCache.m[t] = f
+	fieldCache.Unlock()
+	return f
+}

vendor/github.com/kisielk/gotool/.travis.yml

@@ -1,23 +0,0 @@
-sudo: false
-language: go
-go:
-  - 1.2
-  - 1.3
-  - 1.4
-  - 1.5
-  - 1.6
-  - 1.7
-  - 1.8
-  - 1.9
-  - master
-matrix:
-  allow_failures:
-    - go: master
-  fast_finish: true
-install:
-  - # Skip.
-script:
-  - go get -t -v ./...
-  - diff -u <(echo -n) <(gofmt -d .)
-  - go tool vet .
-  - go test -v -race ./...

vendor/github.com/kisielk/gotool/LEGAL

@@ -1,32 +0,0 @@
-All the files in this distribution are covered under either the MIT
-license (see the file LICENSE) except some files mentioned below.
-
-match.go, match_test.go:
-
-    Copyright (c) 2009 The Go Authors. All rights reserved.
-
-    Redistribution and use in source and binary forms, with or without
-    modification, are permitted provided that the following conditions are
-    met:
-
-       * Redistributions of source code must retain the above copyright
-    notice, this list of conditions and the following disclaimer.
-       * Redistributions in binary form must reproduce the above
-    copyright notice, this list of conditions and the following disclaimer
-    in the documentation and/or other materials provided with the
-    distribution.
-       * Neither the name of Google Inc. nor the names of its
-    contributors may be used to endorse or promote products derived from
-    this software without specific prior written permission.
-
-    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-    "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-    LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-    A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-    OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-    SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-    LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-    DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-    (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-    OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

vendor/github.com/kisielk/gotool/LICENSE

@@ -1,20 +0,0 @@
-Copyright (c) 2013 Kamil Kisiel <kamil@kamilkisiel.net>
-
-Permission is hereby granted, free of charge, to any person obtaining
-a copy of this software and associated documentation files (the
-"Software"), to deal in the Software without restriction, including
-without limitation the rights to use, copy, modify, merge, publish,
-distribute, sublicense, and/or sell copies of the Software, and to
-permit persons to whom the Software is furnished to do so, subject to
-the following conditions:
-
-The above copyright notice and this permission notice shall be
-included in all copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
-EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
-NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
-LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
-OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
-WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

vendor/github.com/kisielk/gotool/README.md

@@ -1,6 +0,0 @@
-gotool
-======
-[![GoDoc](https://godoc.org/github.com/kisielk/gotool?status.svg)](https://godoc.org/github.com/kisielk/gotool)
-[![Build Status](https://travis-ci.org/kisielk/gotool.svg?branch=master)](https://travis-ci.org/kisielk/gotool)
-
-Package gotool contains utility functions used to implement the standard "cmd/go" tool, provided as a convenience to developers who want to write tools with similar semantics.

vendor/github.com/kisielk/gotool/go.mod

@@ -1 +0,0 @@
-module "github.com/kisielk/gotool"

vendor/github.com/kisielk/gotool/go13.go

@@ -1,15 +0,0 @@
-// +build !go1.4
-
-package gotool
-
-import (
-	"go/build"
-	"path/filepath"
-	"runtime"
-)
-
-var gorootSrc = filepath.Join(runtime.GOROOT(), "src", "pkg")
-
-func shouldIgnoreImport(p *build.Package) bool {
-	return true
-}

vendor/github.com/kisielk/gotool/go14-15.go

@@ -1,15 +0,0 @@
-// +build go1.4,!go1.6
-
-package gotool
-
-import (
-	"go/build"
-	"path/filepath"
-	"runtime"
-)
-
-var gorootSrc = filepath.Join(runtime.GOROOT(), "src")
-
-func shouldIgnoreImport(p *build.Package) bool {
-	return true
-}

vendor/github.com/kisielk/gotool/go16-18.go

@@ -1,15 +0,0 @@
-// +build go1.6,!go1.9
-
-package gotool
-
-import (
-	"go/build"
-	"path/filepath"
-	"runtime"
-)
-
-var gorootSrc = filepath.Join(runtime.GOROOT(), "src")
-
-func shouldIgnoreImport(p *build.Package) bool {
-	return p == nil || len(p.InvalidGoFiles) == 0
-}

vendor/github.com/kisielk/gotool/internal/load/path.go

@@ -1,27 +0,0 @@
-// Copyright 2017 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// +build go1.9
-
-package load
-
-import (
-	"strings"
-)
-
-// hasPathPrefix reports whether the path s begins with the
-// elements in prefix.
-func hasPathPrefix(s, prefix string) bool {
-	switch {
-	default:
-		return false
-	case len(s) == len(prefix):
-		return s == prefix
-	case len(s) > len(prefix):
-		if prefix != "" && prefix[len(prefix)-1] == '/' {
-			return strings.HasPrefix(s, prefix)
-		}
-		return s[len(prefix)] == '/' && s[:len(prefix)] == prefix
-	}
-}

vendor/github.com/kisielk/gotool/internal/load/pkg.go

@@ -1,25 +0,0 @@
-// Copyright 2011 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// +build go1.9
-
-// Package load loads packages.
-package load
-
-import (
-	"strings"
-)
-
-// isStandardImportPath reports whether $GOROOT/src/path should be considered
-// part of the standard distribution. For historical reasons we allow people to add
-// their own code to $GOROOT instead of using $GOPATH, but we assume that
-// code will start with a domain name (dot in the first element).
-func isStandardImportPath(path string) bool {
-	i := strings.Index(path, "/")
-	if i < 0 {
-		i = len(path)
-	}
-	elem := path[:i]
-	return !strings.Contains(elem, ".")
-}

vendor/github.com/kisielk/gotool/internal/load/search.go

@@ -1,354 +0,0 @@
-// Copyright 2017 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// +build go1.9
-
-package load
-
-import (
-	"fmt"
-	"go/build"
-	"log"
-	"os"
-	"path"
-	"path/filepath"
-	"regexp"
-	"strings"
-)
-
-// Context specifies values for operation of ImportPaths that would
-// otherwise come from cmd/go/internal/cfg package.
-//
-// This is a construct added for gotool purposes and doesn't have
-// an equivalent upstream in cmd/go.
-type Context struct {
-	// BuildContext is the build context to use.
-	BuildContext build.Context
-
-	// GOROOTsrc is the location of the src directory in GOROOT.
-	// At this time, it's used only in MatchPackages to skip
-	// GOOROOT/src entry from BuildContext.SrcDirs output.
-	GOROOTsrc string
-}
-
-// allPackages returns all the packages that can be found
-// under the $GOPATH directories and $GOROOT matching pattern.
-// The pattern is either "all" (all packages), "std" (standard packages),
-// "cmd" (standard commands), or a path including "...".
-func (c *Context) allPackages(pattern string) []string {
-	pkgs := c.MatchPackages(pattern)
-	if len(pkgs) == 0 {
-		fmt.Fprintf(os.Stderr, "warning: %q matched no packages\n", pattern)
-	}
-	return pkgs
-}
-
-// allPackagesInFS is like allPackages but is passed a pattern
-// beginning ./ or ../, meaning it should scan the tree rooted
-// at the given directory. There are ... in the pattern too.
-func (c *Context) allPackagesInFS(pattern string) []string {
-	pkgs := c.MatchPackagesInFS(pattern)
-	if len(pkgs) == 0 {
-		fmt.Fprintf(os.Stderr, "warning: %q matched no packages\n", pattern)
-	}
-	return pkgs
-}
-
-// MatchPackages returns a list of package paths matching pattern
-// (see go help packages for pattern syntax).
-func (c *Context) MatchPackages(pattern string) []string {
-	match := func(string) bool { return true }
-	treeCanMatch := func(string) bool { return true }
-	if !IsMetaPackage(pattern) {
-		match = matchPattern(pattern)
-		treeCanMatch = treeCanMatchPattern(pattern)
-	}
-
-	have := map[string]bool{
-		"builtin": true, // ignore pseudo-package that exists only for documentation
-	}
-	if !c.BuildContext.CgoEnabled {
-		have["runtime/cgo"] = true // ignore during walk
-	}
-	var pkgs []string
-
-	for _, src := range c.BuildContext.SrcDirs() {
-		if (pattern == "std" || pattern == "cmd") && src != c.GOROOTsrc {
-			continue
-		}
-		src = filepath.Clean(src) + string(filepath.Separator)
-		root := src
-		if pattern == "cmd" {
-			root += "cmd" + string(filepath.Separator)
-		}
-		filepath.Walk(root, func(path string, fi os.FileInfo, err error) error {
-			if err != nil || path == src {
-				return nil
-			}
-
-			want := true
-			// Avoid .foo, _foo, and testdata directory trees.
-			_, elem := filepath.Split(path)
-			if strings.HasPrefix(elem, ".") || strings.HasPrefix(elem, "_") || elem == "testdata" {
-				want = false
-			}
-
-			name := filepath.ToSlash(path[len(src):])
-			if pattern == "std" && (!isStandardImportPath(name) || name == "cmd") {
-				// The name "std" is only the standard library.
-				// If the name is cmd, it's the root of the command tree.
-				want = false
-			}
-			if !treeCanMatch(name) {
-				want = false
-			}
-
-			if !fi.IsDir() {
-				if fi.Mode()&os.ModeSymlink != 0 && want {
-					if target, err := os.Stat(path); err == nil && target.IsDir() {
-						fmt.Fprintf(os.Stderr, "warning: ignoring symlink %s\n", path)
-					}
-				}
-				return nil
-			}
-			if !want {
-				return filepath.SkipDir
-			}
-
-			if have[name] {
-				return nil
-			}
-			have[name] = true
-			if !match(name) {
-				return nil
-			}
-			pkg, err := c.BuildContext.ImportDir(path, 0)
-			if err != nil {
-				if _, noGo := err.(*build.NoGoError); noGo {
-					return nil
-				}
-			}
-
-			// If we are expanding "cmd", skip main
-			// packages under cmd/vendor. At least as of
-			// March, 2017, there is one there for the
-			// vendored pprof tool.
-			if pattern == "cmd" && strings.HasPrefix(pkg.ImportPath, "cmd/vendor") && pkg.Name == "main" {
-				return nil
-			}
-
-			pkgs = append(pkgs, name)
-			return nil
-		})
-	}
-	return pkgs
-}
-
-// MatchPackagesInFS returns a list of package paths matching pattern,
-// which must begin with ./ or ../
-// (see go help packages for pattern syntax).
-func (c *Context) MatchPackagesInFS(pattern string) []string {
-	// Find directory to begin the scan.
-	// Could be smarter but this one optimization
-	// is enough for now, since ... is usually at the
-	// end of a path.
-	i := strings.Index(pattern, "...")
-	dir, _ := path.Split(pattern[:i])
-
-	// pattern begins with ./ or ../.
-	// path.Clean will discard the ./ but not the ../.
-	// We need to preserve the ./ for pattern matching
-	// and in the returned import paths.
-	prefix := ""
-	if strings.HasPrefix(pattern, "./") {
-		prefix = "./"
-	}
-	match := matchPattern(pattern)
-
-	var pkgs []string
-	filepath.Walk(dir, func(path string, fi os.FileInfo, err error) error {
-		if err != nil || !fi.IsDir() {
-			return nil
-		}
-		if path == dir {
-			// filepath.Walk starts at dir and recurses. For the recursive case,
-			// the path is the result of filepath.Join, which calls filepath.Clean.
-			// The initial case is not Cleaned, though, so we do this explicitly.
-			//
-			// This converts a path like "./io/" to "io". Without this step, running
-			// "cd $GOROOT/src; go list ./io/..." would incorrectly skip the io
-			// package, because prepending the prefix "./" to the unclean path would
-			// result in "././io", and match("././io") returns false.
-			path = filepath.Clean(path)
-		}
-
-		// Avoid .foo, _foo, and testdata directory trees, but do not avoid "." or "..".
-		_, elem := filepath.Split(path)
-		dot := strings.HasPrefix(elem, ".") && elem != "." && elem != ".."
-		if dot || strings.HasPrefix(elem, "_") || elem == "testdata" {
-			return filepath.SkipDir
-		}
-
-		name := prefix + filepath.ToSlash(path)
-		if !match(name) {
-			return nil
-		}
-
-		// We keep the directory if we can import it, or if we can't import it
-		// due to invalid Go source files. This means that directories containing
-		// parse errors will be built (and fail) instead of being silently skipped
-		// as not matching the pattern. Go 1.5 and earlier skipped, but that
-		// behavior means people miss serious mistakes.
-		// See golang.org/issue/11407.
-		if p, err := c.BuildContext.ImportDir(path, 0); err != nil && (p == nil || len(p.InvalidGoFiles) == 0) {
-			if _, noGo := err.(*build.NoGoError); !noGo {
-				log.Print(err)
-			}
-			return nil
-		}
-		pkgs = append(pkgs, name)
-		return nil
-	})
-	return pkgs
-}
-
-// treeCanMatchPattern(pattern)(name) reports whether
-// name or children of name can possibly match pattern.
-// Pattern is the same limited glob accepted by matchPattern.
-func treeCanMatchPattern(pattern string) func(name string) bool {
-	wildCard := false
-	if i := strings.Index(pattern, "..."); i >= 0 {
-		wildCard = true
-		pattern = pattern[:i]
-	}
-	return func(name string) bool {
-		return len(name) <= len(pattern) && hasPathPrefix(pattern, name) ||
-			wildCard && strings.HasPrefix(name, pattern)
-	}
-}
-
-// matchPattern(pattern)(name) reports whether
-// name matches pattern. Pattern is a limited glob
-// pattern in which '...' means 'any string' and there
-// is no other special syntax.
-// Unfortunately, there are two special cases. Quoting "go help packages":
-//
-// First, /... at the end of the pattern can match an empty string,
-// so that net/... matches both net and packages in its subdirectories, like net/http.
-// Second, any slash-separted pattern element containing a wildcard never
-// participates in a match of the "vendor" element in the path of a vendored
-// package, so that ./... does not match packages in subdirectories of
-// ./vendor or ./mycode/vendor, but ./vendor/... and ./mycode/vendor/... do.
-// Note, however, that a directory named vendor that itself contains code
-// is not a vendored package: cmd/vendor would be a command named vendor,
-// and the pattern cmd/... matches it.
-func matchPattern(pattern string) func(name string) bool {
-	// Convert pattern to regular expression.
-	// The strategy for the trailing /... is to nest it in an explicit ? expression.
-	// The strategy for the vendor exclusion is to change the unmatchable
-	// vendor strings to a disallowed code point (vendorChar) and to use
-	// "(anything but that codepoint)*" as the implementation of the ... wildcard.
-	// This is a bit complicated but the obvious alternative,
-	// namely a hand-written search like in most shell glob matchers,
-	// is too easy to make accidentally exponential.
-	// Using package regexp guarantees linear-time matching.
-
-	const vendorChar = "\x00"
-
-	if strings.Contains(pattern, vendorChar) {
-		return func(name string) bool { return false }
-	}
-
-	re := regexp.QuoteMeta(pattern)
-	re = replaceVendor(re, vendorChar)
-	switch {
-	case strings.HasSuffix(re, `/`+vendorChar+`/\.\.\.`):
-		re = strings.TrimSuffix(re, `/`+vendorChar+`/\.\.\.`) + `(/vendor|/` + vendorChar + `/\.\.\.)`
-	case re == vendorChar+`/\.\.\.`:
-		re = `(/vendor|/` + vendorChar + `/\.\.\.)`
-	case strings.HasSuffix(re, `/\.\.\.`):
-		re = strings.TrimSuffix(re, `/\.\.\.`) + `(/\.\.\.)?`
-	}
-	re = strings.Replace(re, `\.\.\.`, `[^`+vendorChar+`]*`, -1)
-
-	reg := regexp.MustCompile(`^` + re + `$`)
-
-	return func(name string) bool {
-		if strings.Contains(name, vendorChar) {
-			return false
-		}
-		return reg.MatchString(replaceVendor(name, vendorChar))
-	}
-}
-
-// replaceVendor returns the result of replacing
-// non-trailing vendor path elements in x with repl.
-func replaceVendor(x, repl string) string {
-	if !strings.Contains(x, "vendor") {
-		return x
-	}
-	elem := strings.Split(x, "/")
-	for i := 0; i < len(elem)-1; i++ {
-		if elem[i] == "vendor" {
-			elem[i] = repl
-		}
-	}
-	return strings.Join(elem, "/")
-}
-
-// ImportPaths returns the import paths to use for the given command line.
-func (c *Context) ImportPaths(args []string) []string {
-	args = c.ImportPathsNoDotExpansion(args)
-	var out []string
-	for _, a := range args {
-		if strings.Contains(a, "...") {
-			if build.IsLocalImport(a) {
-				out = append(out, c.allPackagesInFS(a)...)
-			} else {
-				out = append(out, c.allPackages(a)...)
-			}
-			continue
-		}
-		out = append(out, a)
-	}
-	return out
-}
-
-// ImportPathsNoDotExpansion returns the import paths to use for the given
-// command line, but it does no ... expansion.
-func (c *Context) ImportPathsNoDotExpansion(args []string) []string {
-	if len(args) == 0 {
-		return []string{"."}
-	}
-	var out []string
-	for _, a := range args {
-		// Arguments are supposed to be import paths, but
-		// as a courtesy to Windows developers, rewrite \ to /
-		// in command-line arguments. Handles .\... and so on.
-		if filepath.Separator == '\\' {
-			a = strings.Replace(a, `\`, `/`, -1)
-		}
-
-		// Put argument in canonical form, but preserve leading ./.
-		if strings.HasPrefix(a, "./") {
-			a = "./" + path.Clean(a)
-			if a == "./." {
-				a = "."
-			}
-		} else {
-			a = path.Clean(a)
-		}
-		if IsMetaPackage(a) {
-			out = append(out, c.allPackages(a)...)
-			continue
-		}
-		out = append(out, a)
-	}
-	return out
-}
-
-// IsMetaPackage checks if name is a reserved package name that expands to multiple packages.
-func IsMetaPackage(name string) bool {
-	return name == "std" || name == "cmd" || name == "all"
-}

vendor/github.com/kisielk/gotool/match.go

@@ -1,56 +0,0 @@
-// Copyright (c) 2009 The Go Authors. All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//    * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//    * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//    * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// +build go1.9
-
-package gotool
-
-import (
-	"path/filepath"
-
-	"github.com/kisielk/gotool/internal/load"
-)
-
-// importPaths returns the import paths to use for the given command line.
-func (c *Context) importPaths(args []string) []string {
-	lctx := load.Context{
-		BuildContext: c.BuildContext,
-		GOROOTsrc:    c.joinPath(c.BuildContext.GOROOT, "src"),
-	}
-	return lctx.ImportPaths(args)
-}
-
-// joinPath calls c.BuildContext.JoinPath (if not nil) or else filepath.Join.
-//
-// It's a copy of the unexported build.Context.joinPath helper.
-func (c *Context) joinPath(elem ...string) string {
-	if f := c.BuildContext.JoinPath; f != nil {
-		return f(elem...)
-	}
-	return filepath.Join(elem...)
-}

vendor/github.com/kisielk/gotool/match18.go

@@ -1,317 +0,0 @@
-// Copyright (c) 2009 The Go Authors. All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//    * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//    * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//    * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// +build !go1.9
-
-package gotool
-
-import (
-	"fmt"
-	"go/build"
-	"log"
-	"os"
-	"path"
-	"path/filepath"
-	"regexp"
-	"strings"
-)
-
-// This file contains code from the Go distribution.
-
-// matchPattern(pattern)(name) reports whether
-// name matches pattern. Pattern is a limited glob
-// pattern in which '...' means 'any string' and there
-// is no other special syntax.
-func matchPattern(pattern string) func(name string) bool {
-	re := regexp.QuoteMeta(pattern)
-	re = strings.Replace(re, `\.\.\.`, `.*`, -1)
-	// Special case: foo/... matches foo too.
-	if strings.HasSuffix(re, `/.*`) {
-		re = re[:len(re)-len(`/.*`)] + `(/.*)?`
-	}
-	reg := regexp.MustCompile(`^` + re + `$`)
-	return reg.MatchString
-}
-
-// matchPackages returns a list of package paths matching pattern
-// (see go help packages for pattern syntax).
-func (c *Context) matchPackages(pattern string) []string {
-	match := func(string) bool { return true }
-	treeCanMatch := func(string) bool { return true }
-	if !isMetaPackage(pattern) {
-		match = matchPattern(pattern)
-		treeCanMatch = treeCanMatchPattern(pattern)
-	}
-
-	have := map[string]bool{
-		"builtin": true, // ignore pseudo-package that exists only for documentation
-	}
-	if !c.BuildContext.CgoEnabled {
-		have["runtime/cgo"] = true // ignore during walk
-	}
-	var pkgs []string
-
-	for _, src := range c.BuildContext.SrcDirs() {
-		if (pattern == "std" || pattern == "cmd") && src != gorootSrc {
-			continue
-		}
-		src = filepath.Clean(src) + string(filepath.Separator)
-		root := src
-		if pattern == "cmd" {
-			root += "cmd" + string(filepath.Separator)
-		}
-		filepath.Walk(root, func(path string, fi os.FileInfo, err error) error {
-			if err != nil || !fi.IsDir() || path == src {
-				return nil
-			}
-
-			// Avoid .foo, _foo, and testdata directory trees.
-			_, elem := filepath.Split(path)
-			if strings.HasPrefix(elem, ".") || strings.HasPrefix(elem, "_") || elem == "testdata" {
-				return filepath.SkipDir
-			}
-
-			name := filepath.ToSlash(path[len(src):])
-			if pattern == "std" && (!isStandardImportPath(name) || name == "cmd") {
-				// The name "std" is only the standard library.
-				// If the name is cmd, it's the root of the command tree.
-				return filepath.SkipDir
-			}
-			if !treeCanMatch(name) {
-				return filepath.SkipDir
-			}
-			if have[name] {
-				return nil
-			}
-			have[name] = true
-			if !match(name) {
-				return nil
-			}
-			_, err = c.BuildContext.ImportDir(path, 0)
-			if err != nil {
-				if _, noGo := err.(*build.NoGoError); noGo {
-					return nil
-				}
-			}
-			pkgs = append(pkgs, name)
-			return nil
-		})
-	}
-	return pkgs
-}
-
-// importPathsNoDotExpansion returns the import paths to use for the given
-// command line, but it does no ... expansion.
-func (c *Context) importPathsNoDotExpansion(args []string) []string {
-	if len(args) == 0 {
-		return []string{"."}
-	}
-	var out []string
-	for _, a := range args {
-		// Arguments are supposed to be import paths, but
-		// as a courtesy to Windows developers, rewrite \ to /
-		// in command-line arguments. Handles .\... and so on.
-		if filepath.Separator == '\\' {
-			a = strings.Replace(a, `\`, `/`, -1)
-		}
-
-		// Put argument in canonical form, but preserve leading ./.
-		if strings.HasPrefix(a, "./") {
-			a = "./" + path.Clean(a)
-			if a == "./." {
-				a = "."
-			}
-		} else {
-			a = path.Clean(a)
-		}
-		if isMetaPackage(a) {
-			out = append(out, c.allPackages(a)...)
-			continue
-		}
-		out = append(out, a)
-	}
-	return out
-}
-
-// importPaths returns the import paths to use for the given command line.
-func (c *Context) importPaths(args []string) []string {
-	args = c.importPathsNoDotExpansion(args)
-	var out []string
-	for _, a := range args {
-		if strings.Contains(a, "...") {
-			if build.IsLocalImport(a) {
-				out = append(out, c.allPackagesInFS(a)...)
-			} else {
-				out = append(out, c.allPackages(a)...)
-			}
-			continue
-		}
-		out = append(out, a)
-	}
-	return out
-}
-
-// allPackages returns all the packages that can be found
-// under the $GOPATH directories and $GOROOT matching pattern.
-// The pattern is either "all" (all packages), "std" (standard packages),
-// "cmd" (standard commands), or a path including "...".
-func (c *Context) allPackages(pattern string) []string {
-	pkgs := c.matchPackages(pattern)
-	if len(pkgs) == 0 {
-		fmt.Fprintf(os.Stderr, "warning: %q matched no packages\n", pattern)
-	}
-	return pkgs
-}
-
-// allPackagesInFS is like allPackages but is passed a pattern
-// beginning ./ or ../, meaning it should scan the tree rooted
-// at the given directory. There are ... in the pattern too.
-func (c *Context) allPackagesInFS(pattern string) []string {
-	pkgs := c.matchPackagesInFS(pattern)
-	if len(pkgs) == 0 {
-		fmt.Fprintf(os.Stderr, "warning: %q matched no packages\n", pattern)
-	}
-	return pkgs
-}
-
-// matchPackagesInFS returns a list of package paths matching pattern,
-// which must begin with ./ or ../
-// (see go help packages for pattern syntax).
-func (c *Context) matchPackagesInFS(pattern string) []string {
-	// Find directory to begin the scan.
-	// Could be smarter but this one optimization
-	// is enough for now, since ... is usually at the
-	// end of a path.
-	i := strings.Index(pattern, "...")
-	dir, _ := path.Split(pattern[:i])
-
-	// pattern begins with ./ or ../.
-	// path.Clean will discard the ./ but not the ../.
-	// We need to preserve the ./ for pattern matching
-	// and in the returned import paths.
-	prefix := ""
-	if strings.HasPrefix(pattern, "./") {
-		prefix = "./"
-	}
-	match := matchPattern(pattern)
-
-	var pkgs []string
-	filepath.Walk(dir, func(path string, fi os.FileInfo, err error) error {
-		if err != nil || !fi.IsDir() {
-			return nil
-		}
-		if path == dir {
-			// filepath.Walk starts at dir and recurses. For the recursive case,
-			// the path is the result of filepath.Join, which calls filepath.Clean.
-			// The initial case is not Cleaned, though, so we do this explicitly.
-			//
-			// This converts a path like "./io/" to "io". Without this step, running
-			// "cd $GOROOT/src; go list ./io/..." would incorrectly skip the io
-			// package, because prepending the prefix "./" to the unclean path would
-			// result in "././io", and match("././io") returns false.
-			path = filepath.Clean(path)
-		}
-
-		// Avoid .foo, _foo, and testdata directory trees, but do not avoid "." or "..".
-		_, elem := filepath.Split(path)
-		dot := strings.HasPrefix(elem, ".") && elem != "." && elem != ".."
-		if dot || strings.HasPrefix(elem, "_") || elem == "testdata" {
-			return filepath.SkipDir
-		}
-
-		name := prefix + filepath.ToSlash(path)
-		if !match(name) {
-			return nil
-		}
-
-		// We keep the directory if we can import it, or if we can't import it
-		// due to invalid Go source files. This means that directories containing
-		// parse errors will be built (and fail) instead of being silently skipped
-		// as not matching the pattern. Go 1.5 and earlier skipped, but that
-		// behavior means people miss serious mistakes.
-		// See golang.org/issue/11407.
-		if p, err := c.BuildContext.ImportDir(path, 0); err != nil && shouldIgnoreImport(p) {
-			if _, noGo := err.(*build.NoGoError); !noGo {
-				log.Print(err)
-			}
-			return nil
-		}
-		pkgs = append(pkgs, name)
-		return nil
-	})
-	return pkgs
-}
-
-// isMetaPackage checks if name is a reserved package name that expands to multiple packages.
-func isMetaPackage(name string) bool {
-	return name == "std" || name == "cmd" || name == "all"
-}
-
-// isStandardImportPath reports whether $GOROOT/src/path should be considered
-// part of the standard distribution. For historical reasons we allow people to add
-// their own code to $GOROOT instead of using $GOPATH, but we assume that
-// code will start with a domain name (dot in the first element).
-func isStandardImportPath(path string) bool {
-	i := strings.Index(path, "/")
-	if i < 0 {
-		i = len(path)
-	}
-	elem := path[:i]
-	return !strings.Contains(elem, ".")
-}
-
-// hasPathPrefix reports whether the path s begins with the
-// elements in prefix.
-func hasPathPrefix(s, prefix string) bool {
-	switch {
-	default:
-		return false
-	case len(s) == len(prefix):
-		return s == prefix
-	case len(s) > len(prefix):
-		if prefix != "" && prefix[len(prefix)-1] == '/' {
-			return strings.HasPrefix(s, prefix)
-		}
-		return s[len(prefix)] == '/' && s[:len(prefix)] == prefix
-	}
-}
-
-// treeCanMatchPattern(pattern)(name) reports whether
-// name or children of name can possibly match pattern.
-// Pattern is the same limited glob accepted by matchPattern.
-func treeCanMatchPattern(pattern string) func(name string) bool {
-	wildCard := false
-	if i := strings.Index(pattern, "..."); i >= 0 {
-		wildCard = true
-		pattern = pattern[:i]
-	}
-	return func(name string) bool {
-		return len(name) <= len(pattern) && hasPathPrefix(pattern, name) ||
-			wildCard && strings.HasPrefix(name, pattern)
-	}
-}

vendor/github.com/kisielk/gotool/tool.go

@@ -1,48 +0,0 @@
-// Package gotool contains utility functions used to implement the standard
-// "cmd/go" tool, provided as a convenience to developers who want to write
-// tools with similar semantics.
-package gotool
-
-import "go/build"
-
-// Export functions here to make it easier to keep the implementations up to date with upstream.
-
-// DefaultContext is the default context that uses build.Default.
-var DefaultContext = Context{
-	BuildContext: build.Default,
-}
-
-// A Context specifies the supporting context.
-type Context struct {
-	// BuildContext is the build.Context that is used when computing import paths.
-	BuildContext build.Context
-}
-
-// ImportPaths returns the import paths to use for the given command line.
-//
-// The path "all" is expanded to all packages in $GOPATH and $GOROOT.
-// The path "std" is expanded to all packages in the Go standard library.
-// The path "cmd" is expanded to all Go standard commands.
-// The string "..." is treated as a wildcard within a path.
-// When matching recursively, directories are ignored if they are prefixed with
-// a dot or an underscore (such as ".foo" or "_foo"), or are named "testdata".
-// Relative import paths are not converted to full import paths.
-// If args is empty, a single element "." is returned.
-func (c *Context) ImportPaths(args []string) []string {
-	return c.importPaths(args)
-}
-
-// ImportPaths returns the import paths to use for the given command line
-// using default context.
-//
-// The path "all" is expanded to all packages in $GOPATH and $GOROOT.
-// The path "std" is expanded to all packages in the Go standard library.
-// The path "cmd" is expanded to all Go standard commands.
-// The string "..." is treated as a wildcard within a path.
-// When matching recursively, directories are ignored if they are prefixed with
-// a dot or an underscore (such as ".foo" or "_foo"), or are named "testdata".
-// Relative import paths are not converted to full import paths.
-// If args is empty, a single element "." is returned.
-func ImportPaths(args []string) []string {
-	return DefaultContext.importPaths(args)
-}

vendor/golang.org/x/tools/go/packages/doc.go

@@ -0,0 +1,241 @@
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+/*
+Package packages loads Go packages for inspection and analysis.
+
+Note: Though this package is ready for widespread use, we may make minor
+breaking changes if absolutely necessary. Any such change will be
+announced on golang-tools@ at least one week before it is committed. No
+more breaking changes will be made after December 1, 2018.
+
+The Load function takes as input a list of patterns and return a list of Package
+structs describing individual packages matched by those patterns.
+The LoadMode controls the amount of detail in the loaded packages.
+
+Load passes most patterns directly to the underlying build tool,
+but all patterns with the prefix "query=", where query is a
+non-empty string of letters from [a-z], are reserved and may be
+interpreted as query operators.
+
+Only two query operators are currently supported, "file" and "pattern".
+
+The query "file=path/to/file.go" matches the package or packages enclosing
+the Go source file path/to/file.go.  For example "file=~/go/src/fmt/print.go"
+might returns the packages "fmt" and "fmt [fmt.test]".
+
+The query "pattern=string" causes "string" to be passed directly to
+the underlying build tool. In most cases this is unnecessary,
+but an application can use Load("pattern=" + x) as an escaping mechanism
+to ensure that x is not interpreted as a query operator if it contains '='.
+
+A third query "name=identifier" will be added soon.
+It will match packages whose package declaration contains the specified identifier.
+For example, "name=rand" would match the packages "math/rand" and "crypto/rand",
+and "name=main" would match all executables.
+
+All other query operators are reserved for future use and currently
+cause Load to report an error.
+
+The Package struct provides basic information about the package, including
+
+  - ID, a unique identifier for the package in the returned set;
+  - GoFiles, the names of the package's Go source files;
+  - Imports, a map from source import strings to the Packages they name;
+  - Types, the type information for the package's exported symbols;
+  - Syntax, the parsed syntax trees for the package's source code; and
+  - TypeInfo, the result of a complete type-check of the package syntax trees.
+
+(See the documentation for type Package for the complete list of fields
+and more detailed descriptions.)
+
+For example,
+
+	Load(nil, "bytes", "unicode...")
+
+returns four Package structs describing the standard library packages
+bytes, unicode, unicode/utf16, and unicode/utf8. Note that one pattern
+can match multiple packages and that a package might be matched by
+multiple patterns: in general it is not possible to determine which
+packages correspond to which patterns.
+
+Note that the list returned by Load contains only the packages matched
+by the patterns. Their dependencies can be found by walking the import
+graph using the Imports fields.
+
+The Load function can be configured by passing a pointer to a Config as
+the first argument. A nil Config is equivalent to the zero Config, which
+causes Load to run in LoadFiles mode, collecting minimal information.
+See the documentation for type Config for details.
+
+As noted earlier, the Config.Mode controls the amount of detail
+reported about the loaded packages, with each mode returning all the data of the
+previous mode with some extra added. See the documentation for type LoadMode
+for details.
+
+Most tools should pass their command-line arguments (after any flags)
+uninterpreted to the loader, so that the loader can interpret them
+according to the conventions of the underlying build system.
+See the Example function for typical usage.
+
+*/
+package packages // import "golang.org/x/tools/go/packages"
+
+/*
+
+Motivation and design considerations
+
+The new package's design solves problems addressed by two existing
+packages: go/build, which locates and describes packages, and
+golang.org/x/tools/go/loader, which loads, parses and type-checks them.
+The go/build.Package structure encodes too much of the 'go build' way
+of organizing projects, leaving us in need of a data type that describes a
+package of Go source code independent of the underlying build system.
+We wanted something that works equally well with go build and vgo, and
+also other build systems such as Bazel and Blaze, making it possible to
+construct analysis tools that work in all these environments.
+Tools such as errcheck and staticcheck were essentially unavailable to
+the Go community at Google, and some of Google's internal tools for Go
+are unavailable externally.
+This new package provides a uniform way to obtain package metadata by
+querying each of these build systems, optionally supporting their
+preferred command-line notations for packages, so that tools integrate
+neatly with users' build environments. The Metadata query function
+executes an external query tool appropriate to the current workspace.
+
+Loading packages always returns the complete import graph "all the way down",
+even if all you want is information about a single package, because the query
+mechanisms of all the build systems we currently support ({go,vgo} list, and
+blaze/bazel aspect-based query) cannot provide detailed information
+about one package without visiting all its dependencies too, so there is
+no additional asymptotic cost to providing transitive information.
+(This property might not be true of a hypothetical 5th build system.)
+
+In calls to TypeCheck, all initial packages, and any package that
+transitively depends on one of them, must be loaded from source.
+Consider A->B->C->D->E: if A,C are initial, A,B,C must be loaded from
+source; D may be loaded from export data, and E may not be loaded at all
+(though it's possible that D's export data mentions it, so a
+types.Package may be created for it and exposed.)
+
+The old loader had a feature to suppress type-checking of function
+bodies on a per-package basis, primarily intended to reduce the work of
+obtaining type information for imported packages. Now that imports are
+satisfied by export data, the optimization no longer seems necessary.
+
+Despite some early attempts, the old loader did not exploit export data,
+instead always using the equivalent of WholeProgram mode. This was due
+to the complexity of mixing source and export data packages (now
+resolved by the upward traversal mentioned above), and because export data
+files were nearly always missing or stale. Now that 'go build' supports
+caching, all the underlying build systems can guarantee to produce
+export data in a reasonable (amortized) time.
+
+Test "main" packages synthesized by the build system are now reported as
+first-class packages, avoiding the need for clients (such as go/ssa) to
+reinvent this generation logic.
+
+One way in which go/packages is simpler than the old loader is in its
+treatment of in-package tests. In-package tests are packages that
+consist of all the files of the library under test, plus the test files.
+The old loader constructed in-package tests by a two-phase process of
+mutation called "augmentation": first it would construct and type check
+all the ordinary library packages and type-check the packages that
+depend on them; then it would add more (test) files to the package and
+type-check again. This two-phase approach had four major problems:
+1) in processing the tests, the loader modified the library package,
+   leaving no way for a client application to see both the test
+   package and the library package; one would mutate into the other.
+2) because test files can declare additional methods on types defined in
+   the library portion of the package, the dispatch of method calls in
+   the library portion was affected by the presence of the test files.
+   This should have been a clue that the packages were logically
+   different.
+3) this model of "augmentation" assumed at most one in-package test
+   per library package, which is true of projects using 'go build',
+   but not other build systems.
+4) because of the two-phase nature of test processing, all packages that
+   import the library package had to be processed before augmentation,
+   forcing a "one-shot" API and preventing the client from calling Load
+   in several times in sequence as is now possible in WholeProgram mode.
+   (TypeCheck mode has a similar one-shot restriction for a different reason.)
+
+Early drafts of this package supported "multi-shot" operation.
+Although it allowed clients to make a sequence of calls (or concurrent
+calls) to Load, building up the graph of Packages incrementally,
+it was of marginal value: it complicated the API
+(since it allowed some options to vary across calls but not others),
+it complicated the implementation,
+it cannot be made to work in Types mode, as explained above,
+and it was less efficient than making one combined call (when this is possible).
+Among the clients we have inspected, none made multiple calls to load
+but could not be easily and satisfactorily modified to make only a single call.
+However, applications changes may be required.
+For example, the ssadump command loads the user-specified packages
+and in addition the runtime package.  It is tempting to simply append
+"runtime" to the user-provided list, but that does not work if the user
+specified an ad-hoc package such as [a.go b.go].
+Instead, ssadump no longer requests the runtime package,
+but seeks it among the dependencies of the user-specified packages,
+and emits an error if it is not found.
+
+Overlays: the ParseFile hook in the API permits clients to vary the way
+in which ASTs are obtained from filenames; the default implementation is
+based on parser.ParseFile. This features enables editor-integrated tools
+that analyze the contents of modified but unsaved buffers: rather than
+read from the file system, a tool can read from an archive of modified
+buffers provided by the editor.
+This approach has its limits. Because package metadata is obtained by
+fork/execing an external query command for each build system, we can
+fake only the file contents seen by the parser, type-checker, and
+application, but not by the metadata query, so, for example:
+- additional imports in the fake file will not be described by the
+  metadata, so the type checker will fail to load imports that create
+  new dependencies.
+- in TypeCheck mode, because export data is produced by the query
+  command, it will not reflect the fake file contents.
+- this mechanism cannot add files to a package without first saving them.
+
+Questions & Tasks
+
+- Add GOARCH/GOOS?
+  They are not portable concepts, but could be made portable.
+  Our goal has been to allow users to express themselves using the conventions
+  of the underlying build system: if the build system honors GOARCH
+  during a build and during a metadata query, then so should
+  applications built atop that query mechanism.
+  Conversely, if the target architecture of the build is determined by
+  command-line flags, the application can pass the relevant
+  flags through to the build system using a command such as:
+    myapp -query_flag="--cpu=amd64" -query_flag="--os=darwin"
+  However, this approach is low-level, unwieldy, and non-portable.
+  GOOS and GOARCH seem important enough to warrant a dedicated option.
+
+- How should we handle partial failures such as a mixture of good and
+  malformed patterns, existing and non-existent packages, successful and
+  failed builds, import failures, import cycles, and so on, in a call to
+  Load?
+
+- Support bazel, blaze, and go1.10 list, not just go1.11 list.
+
+- Handle (and test) various partial success cases, e.g.
+  a mixture of good packages and:
+  invalid patterns
+  nonexistent packages
+  empty packages
+  packages with malformed package or import declarations
+  unreadable files
+  import cycles
+  other parse errors
+  type errors
+  Make sure we record errors at the correct place in the graph.
+
+- Missing packages among initial arguments are not reported.
+  Return bogus packages for them, like golist does.
+
+- "undeclared name" errors (for example) are reported out of source file
+  order. I suspect this is due to the breadth-first resolution now used
+  by go/types. Is that a bug? Discuss with gri.
+
+*/

vendor/golang.org/x/tools/go/packages/external.go

@@ -0,0 +1,68 @@
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// This file enables an external tool to intercept package requests.
+// If the tool is present then its results are used in preference to
+// the go list command.
+
+package packages
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"os/exec"
+	"strings"
+)
+
+// findExternalTool returns the file path of a tool that supplies
+// the build system package structure, or "" if not found."
+// If GOPACKAGESDRIVER is set in the environment findExternalTool returns its
+// value, otherwise it searches for a binary named gopackagesdriver on the PATH.
+func findExternalDriver(cfg *Config) driver {
+	const toolPrefix = "GOPACKAGESDRIVER="
+	tool := ""
+	for _, env := range cfg.Env {
+		if val := strings.TrimPrefix(env, toolPrefix); val != env {
+			tool = val
+		}
+	}
+	if tool != "" && tool == "off" {
+		return nil
+	}
+	if tool == "" {
+		var err error
+		tool, err = exec.LookPath("gopackagesdriver")
+		if err != nil {
+			return nil
+		}
+	}
+	return func(cfg *Config, words ...string) (*driverResponse, error) {
+		buf := new(bytes.Buffer)
+		fullargs := []string{
+			"list",
+			fmt.Sprintf("-test=%t", cfg.Tests),
+			fmt.Sprintf("-export=%t", usesExportData(cfg)),
+			fmt.Sprintf("-deps=%t", cfg.Mode >= LoadImports),
+		}
+		for _, f := range cfg.BuildFlags {
+			fullargs = append(fullargs, fmt.Sprintf("-buildflag=%v", f))
+		}
+		fullargs = append(fullargs, "--")
+		fullargs = append(fullargs, words...)
+		cmd := exec.CommandContext(cfg.Context, tool, fullargs...)
+		cmd.Env = cfg.Env
+		cmd.Dir = cfg.Dir
+		cmd.Stdout = buf
+		cmd.Stderr = new(bytes.Buffer)
+		if err := cmd.Run(); err != nil {
+			return nil, fmt.Errorf("%v: %v: %s", tool, err, cmd.Stderr)
+		}
+		var response driverResponse
+		if err := json.Unmarshal(buf.Bytes(), &response); err != nil {
+			return nil, err
+		}
+		return &response, nil
+	}
+}

vendor/golang.org/x/tools/go/packages/golist.go

@@ -0,0 +1,625 @@
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package packages
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"io/ioutil"
+	"log"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"regexp"
+	"strings"
+	"sync"
+
+	"golang.org/x/tools/internal/gopathwalk"
+	"golang.org/x/tools/internal/semver"
+)
+
+// A goTooOldError reports that the go command
+// found by exec.LookPath is too old to use the new go list behavior.
+type goTooOldError struct {
+	error
+}
+
+// goListDriver uses the go list command to interpret the patterns and produce
+// the build system package structure.
+// See driver for more details.
+func goListDriver(cfg *Config, patterns ...string) (*driverResponse, error) {
+	// Determine files requested in contains patterns
+	var containFiles []string
+	var packagesNamed []string
+	restPatterns := make([]string, 0, len(patterns))
+	// Extract file= and other [querytype]= patterns. Report an error if querytype
+	// doesn't exist.
+extractQueries:
+	for _, pattern := range patterns {
+		eqidx := strings.Index(pattern, "=")
+		if eqidx < 0 {
+			restPatterns = append(restPatterns, pattern)
+		} else {
+			query, value := pattern[:eqidx], pattern[eqidx+len("="):]
+			switch query {
+			case "file":
+				containFiles = append(containFiles, value)
+			case "pattern":
+				restPatterns = append(restPatterns, value)
+			case "name":
+				packagesNamed = append(packagesNamed, value)
+			case "": // not a reserved query
+				restPatterns = append(restPatterns, pattern)
+			default:
+				for _, rune := range query {
+					if rune < 'a' || rune > 'z' { // not a reserved query
+						restPatterns = append(restPatterns, pattern)
+						continue extractQueries
+					}
+				}
+				// Reject all other patterns containing "="
+				return nil, fmt.Errorf("invalid query type %q in query pattern %q", query, pattern)
+			}
+		}
+	}
+	patterns = restPatterns
+	// Look for the deprecated contains: syntax.
+	// TODO(matloob): delete this around mid-October 2018.
+	restPatterns = restPatterns[:0]
+	for _, pattern := range patterns {
+		if strings.HasPrefix(pattern, "contains:") {
+			containFile := strings.TrimPrefix(pattern, "contains:")
+			containFiles = append(containFiles, containFile)
+		} else {
+			restPatterns = append(restPatterns, pattern)
+		}
+	}
+	containFiles = absJoin(cfg.Dir, containFiles)
+
+	// TODO(matloob): Remove the definition of listfunc and just use golistPackages once go1.12 is released.
+	var listfunc driver
+	listfunc = func(cfg *Config, words ...string) (*driverResponse, error) {
+		response, err := golistDriverCurrent(cfg, words...)
+		if _, ok := err.(goTooOldError); ok {
+			listfunc = golistDriverFallback
+			return listfunc(cfg, words...)
+		}
+		listfunc = golistDriverCurrent
+		return response, err
+	}
+
+	var response *driverResponse
+	var err error
+
+	// see if we have any patterns to pass through to go list.
+	if len(restPatterns) > 0 {
+		response, err = listfunc(cfg, restPatterns...)
+		if err != nil {
+			return nil, err
+		}
+	} else {
+		response = &driverResponse{}
+	}
+
+	if len(containFiles) == 0 && len(packagesNamed) == 0 {
+		return response, nil
+	}
+
+	seenPkgs := make(map[string]*Package) // for deduplication. different containing queries could produce same packages
+	for _, pkg := range response.Packages {
+		seenPkgs[pkg.ID] = pkg
+	}
+	addPkg := func(p *Package) {
+		if _, ok := seenPkgs[p.ID]; ok {
+			return
+		}
+		seenPkgs[p.ID] = p
+		response.Packages = append(response.Packages, p)
+	}
+
+	containsResults, err := runContainsQueries(cfg, listfunc, addPkg, containFiles)
+	if err != nil {
+		return nil, err
+	}
+	response.Roots = append(response.Roots, containsResults...)
+
+	namedResults, err := runNamedQueries(cfg, listfunc, addPkg, packagesNamed)
+	if err != nil {
+		return nil, err
+	}
+	response.Roots = append(response.Roots, namedResults...)
+
+	return response, nil
+}
+
+func runContainsQueries(cfg *Config, driver driver, addPkg func(*Package), queries []string) ([]string, error) {
+	var results []string
+	for _, query := range queries {
+		// TODO(matloob): Do only one query per directory.
+		fdir := filepath.Dir(query)
+		cfg.Dir = fdir
+		dirResponse, err := driver(cfg, ".")
+		if err != nil {
+			return nil, err
+		}
+		isRoot := make(map[string]bool, len(dirResponse.Roots))
+		for _, root := range dirResponse.Roots {
+			isRoot[root] = true
+		}
+		for _, pkg := range dirResponse.Packages {
+			// Add any new packages to the main set
+			// We don't bother to filter packages that will be dropped by the changes of roots,
+			// that will happen anyway during graph construction outside this function.
+			// Over-reporting packages is not a problem.
+			addPkg(pkg)
+			// if the package was not a root one, it cannot have the file
+			if !isRoot[pkg.ID] {
+				continue
+			}
+			for _, pkgFile := range pkg.GoFiles {
+				if filepath.Base(query) == filepath.Base(pkgFile) {
+					results = append(results, pkg.ID)
+					break
+				}
+			}
+		}
+	}
+	return results, nil
+}
+
+// modCacheRegexp splits a path in a module cache into module, module version, and package.
+var modCacheRegexp = regexp.MustCompile(`(.*)@([^/\\]*)(.*)`)
+
+func runNamedQueries(cfg *Config, driver driver, addPkg func(*Package), queries []string) ([]string, error) {
+	// Determine which directories are relevant to scan.
+	roots, modulesEnabled, err := roots(cfg)
+	if err != nil {
+		return nil, err
+	}
+
+	// Scan the selected directories. Simple matches, from GOPATH/GOROOT
+	// or the local module, can simply be "go list"ed. Matches from the
+	// module cache need special treatment.
+	var matchesMu sync.Mutex
+	var simpleMatches, modCacheMatches []string
+	add := func(root gopathwalk.Root, dir string) {
+		// Walk calls this concurrently; protect the result slices.
+		matchesMu.Lock()
+		defer matchesMu.Unlock()
+
+		path := dir[len(root.Path)+1:]
+		if pathMatchesQueries(path, queries) {
+			switch root.Type {
+			case gopathwalk.RootModuleCache:
+				modCacheMatches = append(modCacheMatches, path)
+			case gopathwalk.RootCurrentModule:
+				// We'd need to read go.mod to find the full
+				// import path. Relative's easier.
+				rel, err := filepath.Rel(cfg.Dir, dir)
+				if err != nil {
+					// This ought to be impossible, since
+					// we found dir in the current module.
+					panic(err)
+				}
+				simpleMatches = append(simpleMatches, "./"+rel)
+			case gopathwalk.RootGOPATH, gopathwalk.RootGOROOT:
+				simpleMatches = append(simpleMatches, path)
+			}
+		}
+	}
+	gopathwalk.Walk(roots, add, gopathwalk.Options{ModulesEnabled: modulesEnabled})
+
+	var results []string
+	addResponse := func(r *driverResponse) {
+		for _, pkg := range r.Packages {
+			addPkg(pkg)
+			for _, name := range queries {
+				if pkg.Name == name {
+					results = append(results, pkg.ID)
+					break
+				}
+			}
+		}
+	}
+
+	if len(simpleMatches) != 0 {
+		resp, err := driver(cfg, simpleMatches...)
+		if err != nil {
+			return nil, err
+		}
+		addResponse(resp)
+	}
+
+	// Module cache matches are tricky. We want to avoid downloading new
+	// versions of things, so we need to use the ones present in the cache.
+	// go list doesn't accept version specifiers, so we have to write out a
+	// temporary module, and do the list in that module.
+	if len(modCacheMatches) != 0 {
+		// Collect all the matches, deduplicating by major version
+		// and preferring the newest.
+		type modInfo struct {
+			mod   string
+			major string
+		}
+		mods := make(map[modInfo]string)
+		var imports []string
+		for _, modPath := range modCacheMatches {
+			matches := modCacheRegexp.FindStringSubmatch(modPath)
+			mod, ver := filepath.ToSlash(matches[1]), matches[2]
+			importPath := filepath.ToSlash(filepath.Join(matches[1], matches[3]))
+
+			major := semver.Major(ver)
+			if prevVer, ok := mods[modInfo{mod, major}]; !ok || semver.Compare(ver, prevVer) > 0 {
+				mods[modInfo{mod, major}] = ver
+			}
+
+			imports = append(imports, importPath)
+		}
+
+		// Build the temporary module.
+		var gomod bytes.Buffer
+		gomod.WriteString("module modquery\nrequire (\n")
+		for mod, version := range mods {
+			gomod.WriteString("\t" + mod.mod + " " + version + "\n")
+		}
+		gomod.WriteString(")\n")
+
+		tmpCfg := *cfg
+		var err error
+		tmpCfg.Dir, err = ioutil.TempDir("", "gopackages-modquery")
+		if err != nil {
+			return nil, err
+		}
+		defer os.RemoveAll(tmpCfg.Dir)
+
+		if err := ioutil.WriteFile(filepath.Join(tmpCfg.Dir, "go.mod"), gomod.Bytes(), 0777); err != nil {
+			return nil, fmt.Errorf("writing go.mod for module cache query: %v", err)
+		}
+
+		// Run the query, using the import paths calculated from the matches above.
+		resp, err := driver(&tmpCfg, imports...)
+		if err != nil {
+			return nil, fmt.Errorf("querying module cache matches: %v", err)
+		}
+		addResponse(resp)
+	}
+
+	return results, nil
+}
+
+// roots selects the appropriate paths to walk based on the passed-in configuration,
+// particularly the environment and the presence of a go.mod in cfg.Dir's parents.
+func roots(cfg *Config) ([]gopathwalk.Root, bool, error) {
+	stdout, err := invokeGo(cfg, "env", "GOROOT", "GOPATH", "GOMOD")
+	if err != nil {
+		return nil, false, err
+	}
+
+	fields := strings.Split(stdout.String(), "\n")
+	if len(fields) != 4 || len(fields[3]) != 0 {
+		return nil, false, fmt.Errorf("go env returned unexpected output: %q", stdout.String())
+	}
+	goroot, gopath, gomod := fields[0], filepath.SplitList(fields[1]), fields[2]
+	modsEnabled := gomod != ""
+
+	var roots []gopathwalk.Root
+	// Always add GOROOT.
+	roots = append(roots, gopathwalk.Root{filepath.Join(goroot, "/src"), gopathwalk.RootGOROOT})
+	// If modules are enabled, scan the module dir.
+	if modsEnabled {
+		roots = append(roots, gopathwalk.Root{filepath.Dir(gomod), gopathwalk.RootCurrentModule})
+	}
+	// Add either GOPATH/src or GOPATH/pkg/mod, depending on module mode.
+	for _, p := range gopath {
+		if modsEnabled {
+			roots = append(roots, gopathwalk.Root{filepath.Join(p, "/pkg/mod"), gopathwalk.RootModuleCache})
+		} else {
+			roots = append(roots, gopathwalk.Root{filepath.Join(p, "/src"), gopathwalk.RootGOPATH})
+		}
+	}
+
+	return roots, modsEnabled, nil
+}
+
+// These functions were copied from goimports. See further documentation there.
+
+// pathMatchesQueries is adapted from pkgIsCandidate.
+// TODO: is it reasonable to do Contains here, rather than an exact match on a path component?
+func pathMatchesQueries(path string, queries []string) bool {
+	lastTwo := lastTwoComponents(path)
+	for _, query := range queries {
+		if strings.Contains(lastTwo, query) {
+			return true
+		}
+		if hasHyphenOrUpperASCII(lastTwo) && !hasHyphenOrUpperASCII(query) {
+			lastTwo = lowerASCIIAndRemoveHyphen(lastTwo)
+			if strings.Contains(lastTwo, query) {
+				return true
+			}
+		}
+	}
+	return false
+}
+
+// lastTwoComponents returns at most the last two path components
+// of v, using either / or \ as the path separator.
+func lastTwoComponents(v string) string {
+	nslash := 0
+	for i := len(v) - 1; i >= 0; i-- {
+		if v[i] == '/' || v[i] == '\\' {
+			nslash++
+			if nslash == 2 {
+				return v[i:]
+			}
+		}
+	}
+	return v
+}
+
+func hasHyphenOrUpperASCII(s string) bool {
+	for i := 0; i < len(s); i++ {
+		b := s[i]
+		if b == '-' || ('A' <= b && b <= 'Z') {
+			return true
+		}
+	}
+	return false
+}
+
+func lowerASCIIAndRemoveHyphen(s string) (ret string) {
+	buf := make([]byte, 0, len(s))
+	for i := 0; i < len(s); i++ {
+		b := s[i]
+		switch {
+		case b == '-':
+			continue
+		case 'A' <= b && b <= 'Z':
+			buf = append(buf, b+('a'-'A'))
+		default:
+			buf = append(buf, b)
+		}
+	}
+	return string(buf)
+}
+
+// Fields must match go list;
+// see $GOROOT/src/cmd/go/internal/load/pkg.go.
+type jsonPackage struct {
+	ImportPath      string
+	Dir             string
+	Name            string
+	Export          string
+	GoFiles         []string
+	CompiledGoFiles []string
+	CFiles          []string
+	CgoFiles        []string
+	CXXFiles        []string
+	MFiles          []string
+	HFiles          []string
+	FFiles          []string
+	SFiles          []string
+	SwigFiles       []string
+	SwigCXXFiles    []string
+	SysoFiles       []string
+	Imports         []string
+	ImportMap       map[string]string
+	Deps            []string
+	TestGoFiles     []string
+	TestImports     []string
+	XTestGoFiles    []string
+	XTestImports    []string
+	ForTest         string // q in a "p [q.test]" package, else ""
+	DepOnly         bool
+
+	Error *jsonPackageError
+}
+
+type jsonPackageError struct {
+	ImportStack []string
+	Pos         string
+	Err         string
+}
+
+func otherFiles(p *jsonPackage) [][]string {
+	return [][]string{p.CFiles, p.CXXFiles, p.MFiles, p.HFiles, p.FFiles, p.SFiles, p.SwigFiles, p.SwigCXXFiles, p.SysoFiles}
+}
+
+// golistDriverCurrent uses the "go list" command to expand the
+// pattern words and return metadata for the specified packages.
+// dir may be "" and env may be nil, as per os/exec.Command.
+func golistDriverCurrent(cfg *Config, words ...string) (*driverResponse, error) {
+	// go list uses the following identifiers in ImportPath and Imports:
+	//
+	// 	"p"			-- importable package or main (command)
+	//      "q.test"		-- q's test executable
+	// 	"p [q.test]"		-- variant of p as built for q's test executable
+	//	"q_test [q.test]"	-- q's external test package
+	//
+	// The packages p that are built differently for a test q.test
+	// are q itself, plus any helpers used by the external test q_test,
+	// typically including "testing" and all its dependencies.
+
+	// Run "go list" for complete
+	// information on the specified packages.
+	buf, err := invokeGo(cfg, golistargs(cfg, words)...)
+	if err != nil {
+		return nil, err
+	}
+	// Decode the JSON and convert it to Package form.
+	var response driverResponse
+	for dec := json.NewDecoder(buf); dec.More(); {
+		p := new(jsonPackage)
+		if err := dec.Decode(p); err != nil {
+			return nil, fmt.Errorf("JSON decoding failed: %v", err)
+		}
+
+		if p.ImportPath == "" {
+			// The documentation for go list says that “[e]rroneous packages will have
+			// a non-empty ImportPath”. If for some reason it comes back empty, we
+			// prefer to error out rather than silently discarding data or handing
+			// back a package without any way to refer to it.
+			if p.Error != nil {
+				return nil, Error{
+					Pos: p.Error.Pos,
+					Msg: p.Error.Err,
+				}
+			}
+			return nil, fmt.Errorf("package missing import path: %+v", p)
+		}
+
+		pkg := &Package{
+			Name:            p.Name,
+			ID:              p.ImportPath,
+			GoFiles:         absJoin(p.Dir, p.GoFiles, p.CgoFiles),
+			CompiledGoFiles: absJoin(p.Dir, p.CompiledGoFiles),
+			OtherFiles:      absJoin(p.Dir, otherFiles(p)...),
+		}
+
+		// Extract the PkgPath from the package's ID.
+		if i := strings.IndexByte(pkg.ID, ' '); i >= 0 {
+			pkg.PkgPath = pkg.ID[:i]
+		} else {
+			pkg.PkgPath = pkg.ID
+		}
+
+		if pkg.PkgPath == "unsafe" {
+			pkg.GoFiles = nil // ignore fake unsafe.go file
+		}
+
+		// Assume go list emits only absolute paths for Dir.
+		if p.Dir != "" && !filepath.IsAbs(p.Dir) {
+			log.Fatalf("internal error: go list returned non-absolute Package.Dir: %s", p.Dir)
+		}
+
+		if p.Export != "" && !filepath.IsAbs(p.Export) {
+			pkg.ExportFile = filepath.Join(p.Dir, p.Export)
+		} else {
+			pkg.ExportFile = p.Export
+		}
+
+		// imports
+		//
+		// Imports contains the IDs of all imported packages.
+		// ImportsMap records (path, ID) only where they differ.
+		ids := make(map[string]bool)
+		for _, id := range p.Imports {
+			ids[id] = true
+		}
+		pkg.Imports = make(map[string]*Package)
+		for path, id := range p.ImportMap {
+			pkg.Imports[path] = &Package{ID: id} // non-identity import
+			delete(ids, id)
+		}
+		for id := range ids {
+			if id == "C" {
+				continue
+			}
+
+			pkg.Imports[id] = &Package{ID: id} // identity import
+		}
+		if !p.DepOnly {
+			response.Roots = append(response.Roots, pkg.ID)
+		}
+
+		// TODO(matloob): Temporary hack since CompiledGoFiles isn't always set.
+		if len(pkg.CompiledGoFiles) == 0 {
+			pkg.CompiledGoFiles = pkg.GoFiles
+		}
+
+		if p.Error != nil {
+			pkg.Errors = append(pkg.Errors, Error{
+				Pos: p.Error.Pos,
+				Msg: p.Error.Err,
+			})
+		}
+
+		response.Packages = append(response.Packages, pkg)
+	}
+
+	return &response, nil
+}
+
+// absJoin absolutizes and flattens the lists of files.
+func absJoin(dir string, fileses ...[]string) (res []string) {
+	for _, files := range fileses {
+		for _, file := range files {
+			if !filepath.IsAbs(file) {
+				file = filepath.Join(dir, file)
+			}
+			res = append(res, file)
+		}
+	}
+	return res
+}
+
+func golistargs(cfg *Config, words []string) []string {
+	fullargs := []string{
+		"list", "-e", "-json", "-compiled",
+		fmt.Sprintf("-test=%t", cfg.Tests),
+		fmt.Sprintf("-export=%t", usesExportData(cfg)),
+		fmt.Sprintf("-deps=%t", cfg.Mode >= LoadImports),
+	}
+	fullargs = append(fullargs, cfg.BuildFlags...)
+	fullargs = append(fullargs, "--")
+	fullargs = append(fullargs, words...)
+	return fullargs
+}
+
+// invokeGo returns the stdout of a go command invocation.
+func invokeGo(cfg *Config, args ...string) (*bytes.Buffer, error) {
+	stdout := new(bytes.Buffer)
+	stderr := new(bytes.Buffer)
+	cmd := exec.CommandContext(cfg.Context, "go", args...)
+	// On darwin the cwd gets resolved to the real path, which breaks anything that
+	// expects the working directory to keep the original path, including the
+	// go command when dealing with modules.
+	// The Go stdlib has a special feature where if the cwd and the PWD are the
+	// same node then it trusts the PWD, so by setting it in the env for the child
+	// process we fix up all the paths returned by the go command.
+	cmd.Env = append(append([]string{}, cfg.Env...), "PWD="+cfg.Dir)
+	cmd.Dir = cfg.Dir
+	cmd.Stdout = stdout
+	cmd.Stderr = stderr
+	if err := cmd.Run(); err != nil {
+		exitErr, ok := err.(*exec.ExitError)
+		if !ok {
+			// Catastrophic error:
+			// - executable not found
+			// - context cancellation
+			return nil, fmt.Errorf("couldn't exec 'go %v': %s %T", args, err, err)
+		}
+
+		// Old go version?
+		if strings.Contains(stderr.String(), "flag provided but not defined") {
+			return nil, goTooOldError{fmt.Errorf("unsupported version of go: %s: %s", exitErr, stderr)}
+		}
+
+		// Export mode entails a build.
+		// If that build fails, errors appear on stderr
+		// (despite the -e flag) and the Export field is blank.
+		// Do not fail in that case.
+		if !usesExportData(cfg) {
+			return nil, fmt.Errorf("go %v: %s: %s", args, exitErr, stderr)
+		}
+	}
+
+	// As of writing, go list -export prints some non-fatal compilation
+	// errors to stderr, even with -e set. We would prefer that it put
+	// them in the Package.Error JSON (see http://golang.org/issue/26319).
+	// In the meantime, there's nowhere good to put them, but they can
+	// be useful for debugging. Print them if $GOPACKAGESPRINTGOLISTERRORS
+	// is set.
+	if len(stderr.Bytes()) != 0 && os.Getenv("GOPACKAGESPRINTGOLISTERRORS") != "" {
+		fmt.Fprintf(os.Stderr, "go %v stderr: <<%s>>\n", args, stderr)
+	}
+
+	// debugging
+	if false {
+		fmt.Fprintf(os.Stderr, "go %v stdout: <<%s>>\n", args, stdout)
+	}
+
+	return stdout, nil
+}

vendor/golang.org/x/tools/go/packages/golist_fallback.go

@@ -0,0 +1,457 @@
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package packages
+
+import (
+	"encoding/json"
+	"fmt"
+	"go/build"
+	"io/ioutil"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"sort"
+	"strings"
+
+	"golang.org/x/tools/go/internal/cgo"
+)
+
+// TODO(matloob): Delete this file once Go 1.12 is released.
+
+// This file provides backwards compatibility support for
+// loading for versions of Go earlier than 1.10.4. This support is meant to
+// assist with migration to the Package API until there's
+// widespread adoption of these newer Go versions.
+// This support will be removed once Go 1.12 is released
+// in Q1 2019.
+
+func golistDriverFallback(cfg *Config, words ...string) (*driverResponse, error) {
+	// Turn absolute paths into GOROOT and GOPATH-relative paths to provide to go list.
+	// This will have surprising behavior if GOROOT or GOPATH contain multiple packages with the same
+	// path and a user provides an absolute path to a directory that's shadowed by an earlier
+	// directory in GOROOT or GOPATH with the same package path.
+	words = cleanAbsPaths(cfg, words)
+
+	original, deps, err := getDeps(cfg, words...)
+	if err != nil {
+		return nil, err
+	}
+
+	var tmpdir string // used for generated cgo files
+	var needsTestVariant []struct {
+		pkg, xtestPkg *Package
+	}
+
+	var response driverResponse
+	allPkgs := make(map[string]bool)
+	addPackage := func(p *jsonPackage) {
+		id := p.ImportPath
+
+		if allPkgs[id] {
+			return
+		}
+		allPkgs[id] = true
+
+		isRoot := original[id] != nil
+		pkgpath := id
+
+		if pkgpath == "unsafe" {
+			p.GoFiles = nil // ignore fake unsafe.go file
+		}
+
+		importMap := func(importlist []string) map[string]*Package {
+			importMap := make(map[string]*Package)
+			for _, id := range importlist {
+
+				if id == "C" {
+					for _, path := range []string{"unsafe", "syscall", "runtime/cgo"} {
+						if pkgpath != path && importMap[path] == nil {
+							importMap[path] = &Package{ID: path}
+						}
+					}
+					continue
+				}
+				importMap[vendorlessPath(id)] = &Package{ID: id}
+			}
+			return importMap
+		}
+		compiledGoFiles := absJoin(p.Dir, p.GoFiles)
+		// Use a function to simplify control flow. It's just a bunch of gotos.
+		var cgoErrors []error
+		var outdir string
+		getOutdir := func() (string, error) {
+			if outdir != "" {
+				return outdir, nil
+			}
+			if tmpdir == "" {
+				if tmpdir, err = ioutil.TempDir("", "gopackages"); err != nil {
+					return "", err
+				}
+			}
+			// Add a "go-build" component to the path to make the tests think the files are in the cache.
+			// This allows the same test to test the pre- and post-Go 1.11 go list logic because the Go 1.11
+			// go list generates test mains in the cache, and the test code knows not to rely on paths in the
+			// cache to stay stable.
+			outdir = filepath.Join(tmpdir, "go-build", strings.Replace(p.ImportPath, "/", "_", -1))
+			if err := os.MkdirAll(outdir, 0755); err != nil {
+				outdir = ""
+				return "", err
+			}
+			return outdir, nil
+		}
+		processCgo := func() bool {
+			// Suppress any cgo errors. Any relevant errors will show up in typechecking.
+			// TODO(matloob): Skip running cgo if Mode < LoadTypes.
+			outdir, err := getOutdir()
+			if err != nil {
+				cgoErrors = append(cgoErrors, err)
+				return false
+			}
+			files, _, err := runCgo(p.Dir, outdir, cfg.Env)
+			if err != nil {
+				cgoErrors = append(cgoErrors, err)
+				return false
+			}
+			compiledGoFiles = append(compiledGoFiles, files...)
+			return true
+		}
+		if len(p.CgoFiles) == 0 || !processCgo() {
+			compiledGoFiles = append(compiledGoFiles, absJoin(p.Dir, p.CgoFiles)...) // Punt to typechecker.
+		}
+		if isRoot {
+			response.Roots = append(response.Roots, id)
+		}
+		pkg := &Package{
+			ID:              id,
+			Name:            p.Name,
+			GoFiles:         absJoin(p.Dir, p.GoFiles, p.CgoFiles),
+			CompiledGoFiles: compiledGoFiles,
+			OtherFiles:      absJoin(p.Dir, otherFiles(p)...),
+			PkgPath:         pkgpath,
+			Imports:         importMap(p.Imports),
+			// TODO(matloob): set errors on the Package to cgoErrors
+		}
+		if p.Error != nil {
+			pkg.Errors = append(pkg.Errors, Error{
+				Pos: p.Error.Pos,
+				Msg: p.Error.Err,
+			})
+		}
+		response.Packages = append(response.Packages, pkg)
+		if cfg.Tests && isRoot {
+			testID := fmt.Sprintf("%s [%s.test]", id, id)
+			if len(p.TestGoFiles) > 0 || len(p.XTestGoFiles) > 0 {
+				response.Roots = append(response.Roots, testID)
+				testPkg := &Package{
+					ID:              testID,
+					Name:            p.Name,
+					GoFiles:         absJoin(p.Dir, p.GoFiles, p.CgoFiles, p.TestGoFiles),
+					CompiledGoFiles: append(compiledGoFiles, absJoin(p.Dir, p.TestGoFiles)...),
+					OtherFiles:      absJoin(p.Dir, otherFiles(p)...),
+					PkgPath:         pkgpath,
+					Imports:         importMap(append(p.Imports, p.TestImports...)),
+					// TODO(matloob): set errors on the Package to cgoErrors
+				}
+				response.Packages = append(response.Packages, testPkg)
+				var xtestPkg *Package
+				if len(p.XTestGoFiles) > 0 {
+					xtestID := fmt.Sprintf("%s_test [%s.test]", id, id)
+					response.Roots = append(response.Roots, xtestID)
+					// Generate test variants for all packages q where a path exists
+					// such that xtestPkg -> ... -> q -> ... -> p (where p is the package under test)
+					// and rewrite all import map entries of p to point to testPkg (the test variant of
+					// p), and of each q  to point to the test variant of that q.
+					xtestPkg = &Package{
+						ID:              xtestID,
+						Name:            p.Name + "_test",
+						GoFiles:         absJoin(p.Dir, p.XTestGoFiles),
+						CompiledGoFiles: absJoin(p.Dir, p.XTestGoFiles),
+						PkgPath:         pkgpath + "_test",
+						Imports:         importMap(p.XTestImports),
+					}
+					// Add to list of packages we need to rewrite imports for to refer to test variants.
+					// We may need to create a test variant of a package that hasn't been loaded yet, so
+					// the test variants need to be created later.
+					needsTestVariant = append(needsTestVariant, struct{ pkg, xtestPkg *Package }{pkg, xtestPkg})
+					response.Packages = append(response.Packages, xtestPkg)
+				}
+				// testmain package
+				testmainID := id + ".test"
+				response.Roots = append(response.Roots, testmainID)
+				imports := map[string]*Package{}
+				imports[testPkg.PkgPath] = &Package{ID: testPkg.ID}
+				if xtestPkg != nil {
+					imports[xtestPkg.PkgPath] = &Package{ID: xtestPkg.ID}
+				}
+				testmainPkg := &Package{
+					ID:      testmainID,
+					Name:    "main",
+					PkgPath: testmainID,
+					Imports: imports,
+				}
+				response.Packages = append(response.Packages, testmainPkg)
+				outdir, err := getOutdir()
+				if err != nil {
+					testmainPkg.Errors = append(testmainPkg.Errors, Error{
+						Pos:  "-",
+						Msg:  fmt.Sprintf("failed to generate testmain: %v", err),
+						Kind: ListError,
+					})
+					return
+				}
+				testmain := filepath.Join(outdir, "testmain.go")
+				extraimports, extradeps, err := generateTestmain(testmain, testPkg, xtestPkg)
+				if err != nil {
+					testmainPkg.Errors = append(testmainPkg.Errors, Error{
+						Pos:  "-",
+						Msg:  fmt.Sprintf("failed to generate testmain: %v", err),
+						Kind: ListError,
+					})
+				}
+				deps = append(deps, extradeps...)
+				for _, imp := range extraimports { // testing, testing/internal/testdeps, and maybe os
+					imports[imp] = &Package{ID: imp}
+				}
+				testmainPkg.GoFiles = []string{testmain}
+				testmainPkg.CompiledGoFiles = []string{testmain}
+			}
+		}
+	}
+
+	for _, pkg := range original {
+		addPackage(pkg)
+	}
+	if cfg.Mode < LoadImports || len(deps) == 0 {
+		return &response, nil
+	}
+
+	buf, err := invokeGo(cfg, golistArgsFallback(cfg, deps)...)
+	if err != nil {
+		return nil, err
+	}
+
+	// Decode the JSON and convert it to Package form.
+	for dec := json.NewDecoder(buf); dec.More(); {
+		p := new(jsonPackage)
+		if err := dec.Decode(p); err != nil {
+			return nil, fmt.Errorf("JSON decoding failed: %v", err)
+		}
+
+		addPackage(p)
+	}
+
+	for _, v := range needsTestVariant {
+		createTestVariants(&response, v.pkg, v.xtestPkg)
+	}
+
+	// TODO(matloob): Is this the right ordering?
+	sort.SliceStable(response.Packages, func(i, j int) bool {
+		return response.Packages[i].PkgPath < response.Packages[j].PkgPath
+	})
+
+	return &response, nil
+}
+
+func createTestVariants(response *driverResponse, pkgUnderTest, xtestPkg *Package) {
+	allPkgs := make(map[string]*Package)
+	for _, pkg := range response.Packages {
+		allPkgs[pkg.ID] = pkg
+	}
+	needsTestVariant := make(map[string]bool)
+	needsTestVariant[pkgUnderTest.ID] = true
+	var needsVariantRec func(p *Package) bool
+	needsVariantRec = func(p *Package) bool {
+		if needsTestVariant[p.ID] {
+			return true
+		}
+		for _, imp := range p.Imports {
+			if needsVariantRec(allPkgs[imp.ID]) {
+				// Don't break because we want to make sure all dependencies
+				// have been processed, and all required test variants of our dependencies
+				// exist.
+				needsTestVariant[p.ID] = true
+			}
+		}
+		if !needsTestVariant[p.ID] {
+			return false
+		}
+		// Create a clone of the package. It will share the same strings and lists of source files,
+		// but that's okay. It's only necessary for the Imports map to have a separate identity.
+		testVariant := *p
+		testVariant.ID = fmt.Sprintf("%s [%s.test]", p.ID, pkgUnderTest.ID)
+		testVariant.Imports = make(map[string]*Package)
+		for imp, pkg := range p.Imports {
+			testVariant.Imports[imp] = pkg
+			if needsTestVariant[pkg.ID] {
+				testVariant.Imports[imp] = &Package{ID: fmt.Sprintf("%s [%s.test]", pkg.ID, pkgUnderTest.ID)}
+			}
+		}
+		response.Packages = append(response.Packages, &testVariant)
+		return needsTestVariant[p.ID]
+	}
+	// finally, update the xtest package's imports
+	for imp, pkg := range xtestPkg.Imports {
+		if allPkgs[pkg.ID] == nil {
+			fmt.Printf("for %s: package %s doesn't exist\n", xtestPkg.ID, pkg.ID)
+		}
+		if needsVariantRec(allPkgs[pkg.ID]) {
+			xtestPkg.Imports[imp] = &Package{ID: fmt.Sprintf("%s [%s.test]", pkg.ID, pkgUnderTest.ID)}
+		}
+	}
+}
+
+// cleanAbsPaths replaces all absolute paths with GOPATH- and GOROOT-relative
+// paths. If an absolute path is not GOPATH- or GOROOT- relative, it is left as an
+// absolute path so an error can be returned later.
+func cleanAbsPaths(cfg *Config, words []string) []string {
+	var searchpaths []string
+	var cleaned = make([]string, len(words))
+	for i := range cleaned {
+		cleaned[i] = words[i]
+		// Ignore relative directory paths (they must already be goroot-relative) and Go source files
+		// (absolute source files are already allowed for ad-hoc packages).
+		// TODO(matloob): Can there be non-.go files in ad-hoc packages.
+		if !filepath.IsAbs(cleaned[i]) || strings.HasSuffix(cleaned[i], ".go") {
+			continue
+		}
+		// otherwise, it's an absolute path. Search GOPATH and GOROOT to find it.
+		if searchpaths == nil {
+			cmd := exec.Command("go", "env", "GOPATH", "GOROOT")
+			cmd.Env = cfg.Env
+			out, err := cmd.Output()
+			if err != nil {
+				searchpaths = []string{}
+				continue // suppress the error, it will show up again when running go list
+			}
+			lines := strings.Split(string(out), "\n")
+			if len(lines) != 3 || lines[0] == "" || lines[1] == "" || lines[2] != "" {
+				continue // suppress error
+			}
+			// first line is GOPATH
+			for _, path := range filepath.SplitList(lines[0]) {
+				searchpaths = append(searchpaths, filepath.Join(path, "src"))
+			}
+			// second line is GOROOT
+			searchpaths = append(searchpaths, filepath.Join(lines[1], "src"))
+		}
+		for _, sp := range searchpaths {
+			if strings.HasPrefix(cleaned[i], sp) {
+				cleaned[i] = strings.TrimPrefix(cleaned[i], sp)
+				cleaned[i] = strings.TrimLeft(cleaned[i], string(filepath.Separator))
+			}
+		}
+	}
+	return cleaned
+}
+
+// vendorlessPath returns the devendorized version of the import path ipath.
+// For example, VendorlessPath("foo/bar/vendor/a/b") returns "a/b".
+// Copied from golang.org/x/tools/imports/fix.go.
+func vendorlessPath(ipath string) string {
+	// Devendorize for use in import statement.
+	if i := strings.LastIndex(ipath, "/vendor/"); i >= 0 {
+		return ipath[i+len("/vendor/"):]
+	}
+	if strings.HasPrefix(ipath, "vendor/") {
+		return ipath[len("vendor/"):]
+	}
+	return ipath
+}
+
+// getDeps runs an initial go list to determine all the dependency packages.
+func getDeps(cfg *Config, words ...string) (originalSet map[string]*jsonPackage, deps []string, err error) {
+	buf, err := invokeGo(cfg, golistArgsFallback(cfg, words)...)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	depsSet := make(map[string]bool)
+	originalSet = make(map[string]*jsonPackage)
+	var testImports []string
+
+	// Extract deps from the JSON.
+	for dec := json.NewDecoder(buf); dec.More(); {
+		p := new(jsonPackage)
+		if err := dec.Decode(p); err != nil {
+			return nil, nil, fmt.Errorf("JSON decoding failed: %v", err)
+		}
+
+		originalSet[p.ImportPath] = p
+		for _, dep := range p.Deps {
+			depsSet[dep] = true
+		}
+		if cfg.Tests {
+			// collect the additional imports of the test packages.
+			pkgTestImports := append(p.TestImports, p.XTestImports...)
+			for _, imp := range pkgTestImports {
+				if depsSet[imp] {
+					continue
+				}
+				depsSet[imp] = true
+				testImports = append(testImports, imp)
+			}
+		}
+	}
+	// Get the deps of the packages imported by tests.
+	if len(testImports) > 0 {
+		buf, err = invokeGo(cfg, golistArgsFallback(cfg, testImports)...)
+		if err != nil {
+			return nil, nil, err
+		}
+		// Extract deps from the JSON.
+		for dec := json.NewDecoder(buf); dec.More(); {
+			p := new(jsonPackage)
+			if err := dec.Decode(p); err != nil {
+				return nil, nil, fmt.Errorf("JSON decoding failed: %v", err)
+			}
+			for _, dep := range p.Deps {
+				depsSet[dep] = true
+			}
+		}
+	}
+
+	for orig := range originalSet {
+		delete(depsSet, orig)
+	}
+
+	deps = make([]string, 0, len(depsSet))
+	for dep := range depsSet {
+		deps = append(deps, dep)
+	}
+	sort.Strings(deps) // ensure output is deterministic
+	return originalSet, deps, nil
+}
+
+func golistArgsFallback(cfg *Config, words []string) []string {
+	fullargs := []string{"list", "-e", "-json"}
+	fullargs = append(fullargs, cfg.BuildFlags...)
+	fullargs = append(fullargs, "--")
+	fullargs = append(fullargs, words...)
+	return fullargs
+}
+
+func runCgo(pkgdir, tmpdir string, env []string) (files, displayfiles []string, err error) {
+	// Use go/build to open cgo files and determine the cgo flags, etc, from them.
+	// This is tricky so it's best to avoid reimplementing as much as we can, and
+	// we plan to delete this support once Go 1.12 is released anyways.
+	// TODO(matloob): This isn't completely correct because we're using the Default
+	// context. Perhaps we should more accurately fill in the context.
+	bp, err := build.ImportDir(pkgdir, build.ImportMode(0))
+	if err != nil {
+		return nil, nil, err
+	}
+	for _, ev := range env {
+		if v := strings.TrimPrefix(ev, "CGO_CPPFLAGS"); v != ev {
+			bp.CgoCPPFLAGS = append(bp.CgoCPPFLAGS, strings.Fields(v)...)
+		} else if v := strings.TrimPrefix(ev, "CGO_CFLAGS"); v != ev {
+			bp.CgoCFLAGS = append(bp.CgoCFLAGS, strings.Fields(v)...)
+		} else if v := strings.TrimPrefix(ev, "CGO_CXXFLAGS"); v != ev {
+			bp.CgoCXXFLAGS = append(bp.CgoCXXFLAGS, strings.Fields(v)...)
+		} else if v := strings.TrimPrefix(ev, "CGO_LDFLAGS"); v != ev {
+			bp.CgoLDFLAGS = append(bp.CgoLDFLAGS, strings.Fields(v)...)
+		}
+	}
+	return cgo.Run(bp, pkgdir, tmpdir, true)
+}

vendor/golang.org/x/tools/go/packages/golist_fallback_testmain.go

@@ -0,0 +1,318 @@
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// This file is largely based on the Go 1.10-era cmd/go/internal/test/test.go
+// testmain generation code.
+
+package packages
+
+import (
+	"errors"
+	"fmt"
+	"go/ast"
+	"go/doc"
+	"go/parser"
+	"go/token"
+	"os"
+	"sort"
+	"strings"
+	"text/template"
+	"unicode"
+	"unicode/utf8"
+)
+
+// TODO(matloob): Delete this file once Go 1.12 is released.
+
+// This file complements golist_fallback.go by providing
+// support for generating testmains.
+
+func generateTestmain(out string, testPkg, xtestPkg *Package) (extraimports, extradeps []string, err error) {
+	testFuncs, err := loadTestFuncs(testPkg, xtestPkg)
+	if err != nil {
+		return nil, nil, err
+	}
+	extraimports = []string{"testing", "testing/internal/testdeps"}
+	if testFuncs.TestMain == nil {
+		extraimports = append(extraimports, "os")
+	}
+	// Transitive dependencies of ("testing", "testing/internal/testdeps").
+	// os is part of the transitive closure so it and its transitive dependencies are
+	// included regardless of whether it's imported in the template below.
+	extradeps = []string{
+		"errors",
+		"internal/cpu",
+		"unsafe",
+		"internal/bytealg",
+		"internal/race",
+		"runtime/internal/atomic",
+		"runtime/internal/sys",
+		"runtime",
+		"sync/atomic",
+		"sync",
+		"io",
+		"unicode",
+		"unicode/utf8",
+		"bytes",
+		"math",
+		"syscall",
+		"time",
+		"internal/poll",
+		"internal/syscall/unix",
+		"internal/testlog",
+		"os",
+		"math/bits",
+		"strconv",
+		"reflect",
+		"fmt",
+		"sort",
+		"strings",
+		"flag",
+		"runtime/debug",
+		"context",
+		"runtime/trace",
+		"testing",
+		"bufio",
+		"regexp/syntax",
+		"regexp",
+		"compress/flate",
+		"encoding/binary",
+		"hash",
+		"hash/crc32",
+		"compress/gzip",
+		"path/filepath",
+		"io/ioutil",
+		"text/tabwriter",
+		"runtime/pprof",
+		"testing/internal/testdeps",
+	}
+	return extraimports, extradeps, writeTestmain(out, testFuncs)
+}
+
+// The following is adapted from the cmd/go testmain generation code.
+
+// isTestFunc tells whether fn has the type of a testing function. arg
+// specifies the parameter type we look for: B, M or T.
+func isTestFunc(fn *ast.FuncDecl, arg string) bool {
+	if fn.Type.Results != nil && len(fn.Type.Results.List) > 0 ||
+		fn.Type.Params.List == nil ||
+		len(fn.Type.Params.List) != 1 ||
+		len(fn.Type.Params.List[0].Names) > 1 {
+		return false
+	}
+	ptr, ok := fn.Type.Params.List[0].Type.(*ast.StarExpr)
+	if !ok {
+		return false
+	}
+	// We can't easily check that the type is *testing.M
+	// because we don't know how testing has been imported,
+	// but at least check that it's *M or *something.M.
+	// Same applies for B and T.
+	if name, ok := ptr.X.(*ast.Ident); ok && name.Name == arg {
+		return true
+	}
+	if sel, ok := ptr.X.(*ast.SelectorExpr); ok && sel.Sel.Name == arg {
+		return true
+	}
+	return false
+}
+
+// isTest tells whether name looks like a test (or benchmark, according to prefix).
+// It is a Test (say) if there is a character after Test that is not a lower-case letter.
+// We don't want TesticularCancer.
+func isTest(name, prefix string) bool {
+	if !strings.HasPrefix(name, prefix) {
+		return false
+	}
+	if len(name) == len(prefix) { // "Test" is ok
+		return true
+	}
+	rune, _ := utf8.DecodeRuneInString(name[len(prefix):])
+	return !unicode.IsLower(rune)
+}
+
+// loadTestFuncs returns the testFuncs describing the tests that will be run.
+func loadTestFuncs(ptest, pxtest *Package) (*testFuncs, error) {
+	t := &testFuncs{
+		TestPackage:  ptest,
+		XTestPackage: pxtest,
+	}
+	for _, file := range ptest.GoFiles {
+		if !strings.HasSuffix(file, "_test.go") {
+			continue
+		}
+		if err := t.load(file, "_test", &t.ImportTest, &t.NeedTest); err != nil {
+			return nil, err
+		}
+	}
+	if pxtest != nil {
+		for _, file := range pxtest.GoFiles {
+			if err := t.load(file, "_xtest", &t.ImportXtest, &t.NeedXtest); err != nil {
+				return nil, err
+			}
+		}
+	}
+	return t, nil
+}
+
+// writeTestmain writes the _testmain.go file for t to the file named out.
+func writeTestmain(out string, t *testFuncs) error {
+	f, err := os.Create(out)
+	if err != nil {
+		return err
+	}
+	defer f.Close()
+
+	if err := testmainTmpl.Execute(f, t); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+type testFuncs struct {
+	Tests        []testFunc
+	Benchmarks   []testFunc
+	Examples     []testFunc
+	TestMain     *testFunc
+	TestPackage  *Package
+	XTestPackage *Package
+	ImportTest   bool
+	NeedTest     bool
+	ImportXtest  bool
+	NeedXtest    bool
+}
+
+// Tested returns the name of the package being tested.
+func (t *testFuncs) Tested() string {
+	return t.TestPackage.Name
+}
+
+type testFunc struct {
+	Package   string // imported package name (_test or _xtest)
+	Name      string // function name
+	Output    string // output, for examples
+	Unordered bool   // output is allowed to be unordered.
+}
+
+func (t *testFuncs) load(filename, pkg string, doImport, seen *bool) error {
+	var fset = token.NewFileSet()
+
+	f, err := parser.ParseFile(fset, filename, nil, parser.ParseComments)
+	if err != nil {
+		return errors.New("failed to parse test file " + filename)
+	}
+	for _, d := range f.Decls {
+		n, ok := d.(*ast.FuncDecl)
+		if !ok {
+			continue
+		}
+		if n.Recv != nil {
+			continue
+		}
+		name := n.Name.String()
+		switch {
+		case name == "TestMain":
+			if isTestFunc(n, "T") {
+				t.Tests = append(t.Tests, testFunc{pkg, name, "", false})
+				*doImport, *seen = true, true
+				continue
+			}
+			err := checkTestFunc(fset, n, "M")
+			if err != nil {
+				return err
+			}
+			if t.TestMain != nil {
+				return errors.New("multiple definitions of TestMain")
+			}
+			t.TestMain = &testFunc{pkg, name, "", false}
+			*doImport, *seen = true, true
+		case isTest(name, "Test"):
+			err := checkTestFunc(fset, n, "T")
+			if err != nil {
+				return err
+			}
+			t.Tests = append(t.Tests, testFunc{pkg, name, "", false})
+			*doImport, *seen = true, true
+		case isTest(name, "Benchmark"):
+			err := checkTestFunc(fset, n, "B")
+			if err != nil {
+				return err
+			}
+			t.Benchmarks = append(t.Benchmarks, testFunc{pkg, name, "", false})
+			*doImport, *seen = true, true
+		}
+	}
+	ex := doc.Examples(f)
+	sort.Slice(ex, func(i, j int) bool { return ex[i].Order < ex[j].Order })
+	for _, e := range ex {
+		*doImport = true // import test file whether executed or not
+		if e.Output == "" && !e.EmptyOutput {
+			// Don't run examples with no output.
+			continue
+		}
+		t.Examples = append(t.Examples, testFunc{pkg, "Example" + e.Name, e.Output, e.Unordered})
+		*seen = true
+	}
+	return nil
+}
+
+func checkTestFunc(fset *token.FileSet, fn *ast.FuncDecl, arg string) error {
+	if !isTestFunc(fn, arg) {
+		name := fn.Name.String()
+		pos := fset.Position(fn.Pos())
+		return fmt.Errorf("%s: wrong signature for %s, must be: func %s(%s *testing.%s)", pos, name, name, strings.ToLower(arg), arg)
+	}
+	return nil
+}
+
+var testmainTmpl = template.Must(template.New("main").Parse(`
+package main
+
+import (
+{{if not .TestMain}}
+	"os"
+{{end}}
+	"testing"
+	"testing/internal/testdeps"
+
+{{if .ImportTest}}
+	{{if .NeedTest}}_test{{else}}_{{end}} {{.TestPackage.PkgPath | printf "%q"}}
+{{end}}
+{{if .ImportXtest}}
+	{{if .NeedXtest}}_xtest{{else}}_{{end}} {{.XTestPackage.PkgPath | printf "%q"}}
+{{end}}
+)
+
+var tests = []testing.InternalTest{
+{{range .Tests}}
+	{"{{.Name}}", {{.Package}}.{{.Name}}},
+{{end}}
+}
+
+var benchmarks = []testing.InternalBenchmark{
+{{range .Benchmarks}}
+	{"{{.Name}}", {{.Package}}.{{.Name}}},
+{{end}}
+}
+
+var examples = []testing.InternalExample{
+{{range .Examples}}
+	{"{{.Name}}", {{.Package}}.{{.Name}}, {{.Output | printf "%q"}}, {{.Unordered}}},
+{{end}}
+}
+
+func init() {
+	testdeps.ImportPath = {{.TestPackage.PkgPath | printf "%q"}}
+}
+
+func main() {
+	m := testing.MainStart(testdeps.TestDeps{}, tests, benchmarks, examples)
+{{with .TestMain}}
+	{{.Package}}.{{.Name}}(m)
+{{else}}
+	os.Exit(m.Run())
+{{end}}
+}
+
+`))

vendor/golang.org/x/tools/go/packages/packages.go

@@ -0,0 +1,935 @@
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package packages
+
+// See doc.go for package documentation and implementation notes.
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"go/ast"
+	"go/parser"
+	"go/scanner"
+	"go/token"
+	"go/types"
+	"io/ioutil"
+	"log"
+	"os"
+	"path/filepath"
+	"runtime"
+	"strings"
+	"sync"
+
+	"golang.org/x/tools/go/gcexportdata"
+)
+
+// A LoadMode specifies the amount of detail to return when loading.
+// Higher-numbered modes cause Load to return more information,
+// but may be slower. Load may return more information than requested.
+type LoadMode int
+
+const (
+	// LoadFiles finds the packages and computes their source file lists.
+	// Package fields: ID, Name, Errors, GoFiles, and OtherFiles.
+	LoadFiles LoadMode = iota
+
+	// LoadImports adds import information for each package
+	// and its dependencies.
+	// Package fields added: Imports.
+	LoadImports
+
+	// LoadTypes adds type information for package-level
+	// declarations in the packages matching the patterns.
+	// Package fields added: Types, Fset, and IllTyped.
+	// This mode uses type information provided by the build system when
+	// possible, and may fill in the ExportFile field.
+	LoadTypes
+
+	// LoadSyntax adds typed syntax trees for the packages matching the patterns.
+	// Package fields added: Syntax, and TypesInfo, for direct pattern matches only.
+	LoadSyntax
+
+	// LoadAllSyntax adds typed syntax trees for the packages matching the patterns
+	// and all dependencies.
+	// Package fields added: Types, Fset, Illtyped, Syntax, and TypesInfo,
+	// for all packages in the import graph.
+	LoadAllSyntax
+)
+
+// An Config specifies details about how packages should be loaded.
+// The zero value is a valid configuration.
+// Calls to Load do not modify this struct.
+type Config struct {
+	// Mode controls the level of information returned for each package.
+	Mode LoadMode
+
+	// Context specifies the context for the load operation.
+	// If the context is cancelled, the loader may stop early
+	// and return an ErrCancelled error.
+	// If Context is nil, the load cannot be cancelled.
+	Context context.Context
+
+	// Dir is the directory in which to run the build system's query tool
+	// that provides information about the packages.
+	// If Dir is empty, the tool is run in the current directory.
+	Dir string
+
+	// Env is the environment to use when invoking the build system's query tool.
+	// If Env is nil, the current environment is used.
+	// As in os/exec's Cmd, only the last value in the slice for
+	// each environment key is used. To specify the setting of only
+	// a few variables, append to the current environment, as in:
+	//
+	//	opt.Env = append(os.Environ(), "GOOS=plan9", "GOARCH=386")
+	//
+	Env []string
+
+	// BuildFlags is a list of command-line flags to be passed through to
+	// the build system's query tool.
+	BuildFlags []string
+
+	// Fset provides source position information for syntax trees and types.
+	// If Fset is nil, the loader will create a new FileSet.
+	Fset *token.FileSet
+
+	// ParseFile is called to read and parse each file
+	// when preparing a package's type-checked syntax tree.
+	// It must be safe to call ParseFile simultaneously from multiple goroutines.
+	// If ParseFile is nil, the loader will uses parser.ParseFile.
+	//
+	// ParseFile should parse the source from src and use filename only for
+	// recording position information.
+	//
+	// An application may supply a custom implementation of ParseFile
+	// to change the effective file contents or the behavior of the parser,
+	// or to modify the syntax tree. For example, selectively eliminating
+	// unwanted function bodies can significantly accelerate type checking.
+	ParseFile func(fset *token.FileSet, filename string, src []byte) (*ast.File, error)
+
+	// If Tests is set, the loader includes not just the packages
+	// matching a particular pattern but also any related test packages,
+	// including test-only variants of the package and the test executable.
+	//
+	// For example, when using the go command, loading "fmt" with Tests=true
+	// returns four packages, with IDs "fmt" (the standard package),
+	// "fmt [fmt.test]" (the package as compiled for the test),
+	// "fmt_test" (the test functions from source files in package fmt_test),
+	// and "fmt.test" (the test binary).
+	//
+	// In build systems with explicit names for tests,
+	// setting Tests may have no effect.
+	Tests bool
+
+	// Overlay provides a mapping of absolute file paths to file contents.
+	// If the file  with the given path already exists, the parser will use the
+	// alternative file contents provided by the map.
+	//
+	// The Package.Imports map may not include packages that are imported only
+	// by the alternative file contents provided by Overlay. This may cause
+	// type-checking to fail.
+	Overlay map[string][]byte
+}
+
+// driver is the type for functions that query the build system for the
+// packages named by the patterns.
+type driver func(cfg *Config, patterns ...string) (*driverResponse, error)
+
+// driverResponse contains the results for a driver query.
+type driverResponse struct {
+	// Roots is the set of package IDs that make up the root packages.
+	// We have to encode this separately because when we encode a single package
+	// we cannot know if it is one of the roots as that requires knowledge of the
+	// graph it is part of.
+	Roots []string `json:",omitempty"`
+
+	// Packages is the full set of packages in the graph.
+	// The packages are not connected into a graph.
+	// The Imports if populated will be stubs that only have their ID set.
+	// Imports will be connected and then type and syntax information added in a
+	// later pass (see refine).
+	Packages []*Package
+}
+
+// Load loads and returns the Go packages named by the given patterns.
+//
+// Config specifies loading options;
+// nil behaves the same as an empty Config.
+//
+// Load returns an error if any of the patterns was invalid
+// as defined by the underlying build system.
+// It may return an empty list of packages without an error,
+// for instance for an empty expansion of a valid wildcard.
+// Errors associated with a particular package are recorded in the
+// corresponding Package's Errors list, and do not cause Load to
+// return an error. Clients may need to handle such errors before
+// proceeding with further analysis. The PrintErrors function is
+// provided for convenient display of all errors.
+func Load(cfg *Config, patterns ...string) ([]*Package, error) {
+	l := newLoader(cfg)
+	response, err := defaultDriver(&l.Config, patterns...)
+	if err != nil {
+		return nil, err
+	}
+	return l.refine(response.Roots, response.Packages...)
+}
+
+// defaultDriver is a driver that looks for an external driver binary, and if
+// it does not find it falls back to the built in go list driver.
+func defaultDriver(cfg *Config, patterns ...string) (*driverResponse, error) {
+	driver := findExternalDriver(cfg)
+	if driver == nil {
+		driver = goListDriver
+	}
+	return driver(cfg, patterns...)
+}
+
+// A Package describes a loaded Go package.
+type Package struct {
+	// ID is a unique identifier for a package,
+	// in a syntax provided by the underlying build system.
+	//
+	// Because the syntax varies based on the build system,
+	// clients should treat IDs as opaque and not attempt to
+	// interpret them.
+	ID string
+
+	// Name is the package name as it appears in the package source code.
+	Name string
+
+	// PkgPath is the package path as used by the go/types package.
+	PkgPath string
+
+	// Errors contains any errors encountered querying the metadata
+	// of the package, or while parsing or type-checking its files.
+	Errors []Error
+
+	// GoFiles lists the absolute file paths of the package's Go source files.
+	GoFiles []string
+
+	// CompiledGoFiles lists the absolute file paths of the package's source
+	// files that were presented to the compiler.
+	// This may differ from GoFiles if files are processed before compilation.
+	CompiledGoFiles []string
+
+	// OtherFiles lists the absolute file paths of the package's non-Go source files,
+	// including assembly, C, C++, Fortran, Objective-C, SWIG, and so on.
+	OtherFiles []string
+
+	// ExportFile is the absolute path to a file containing type
+	// information for the package as provided by the build system.
+	ExportFile string
+
+	// Imports maps import paths appearing in the package's Go source files
+	// to corresponding loaded Packages.
+	Imports map[string]*Package
+
+	// Types provides type information for the package.
+	// Modes LoadTypes and above set this field for packages matching the
+	// patterns; type information for dependencies may be missing or incomplete.
+	// Mode LoadAllSyntax sets this field for all packages, including dependencies.
+	Types *types.Package
+
+	// Fset provides position information for Types, TypesInfo, and Syntax.
+	// It is set only when Types is set.
+	Fset *token.FileSet
+
+	// IllTyped indicates whether the package or any dependency contains errors.
+	// It is set only when Types is set.
+	IllTyped bool
+
+	// Syntax is the package's syntax trees, for the files listed in CompiledGoFiles.
+	//
+	// Mode LoadSyntax sets this field for packages matching the patterns.
+	// Mode LoadAllSyntax sets this field for all packages, including dependencies.
+	Syntax []*ast.File
+
+	// TypesInfo provides type information about the package's syntax trees.
+	// It is set only when Syntax is set.
+	TypesInfo *types.Info
+}
+
+// An Error describes a problem with a package's metadata, syntax, or types.
+type Error struct {
+	Pos  string // "file:line:col" or "file:line" or "" or "-"
+	Msg  string
+	Kind ErrorKind
+}
+
+// ErrorKind describes the source of the error, allowing the user to
+// differentiate between errors generated by the driver, the parser, or the
+// type-checker.
+type ErrorKind int
+
+const (
+	UnknownError ErrorKind = iota
+	ListError
+	ParseError
+	TypeError
+)
+
+func (err Error) Error() string {
+	pos := err.Pos
+	if pos == "" {
+		pos = "-" // like token.Position{}.String()
+	}
+	return pos + ": " + err.Msg
+}
+
+// flatPackage is the JSON form of Package
+// It drops all the type and syntax fields, and transforms the Imports
+//
+// TODO(adonovan): identify this struct with Package, effectively
+// publishing the JSON protocol.
+type flatPackage struct {
+	ID              string
+	Name            string            `json:",omitempty"`
+	PkgPath         string            `json:",omitempty"`
+	Errors          []Error           `json:",omitempty"`
+	GoFiles         []string          `json:",omitempty"`
+	CompiledGoFiles []string          `json:",omitempty"`
+	OtherFiles      []string          `json:",omitempty"`
+	ExportFile      string            `json:",omitempty"`
+	Imports         map[string]string `json:",omitempty"`
+}
+
+// MarshalJSON returns the Package in its JSON form.
+// For the most part, the structure fields are written out unmodified, and
+// the type and syntax fields are skipped.
+// The imports are written out as just a map of path to package id.
+// The errors are written using a custom type that tries to preserve the
+// structure of error types we know about.
+//
+// This method exists to enable support for additional build systems.  It is
+// not intended for use by clients of the API and we may change the format.
+func (p *Package) MarshalJSON() ([]byte, error) {
+	flat := &flatPackage{
+		ID:              p.ID,
+		Name:            p.Name,
+		PkgPath:         p.PkgPath,
+		Errors:          p.Errors,
+		GoFiles:         p.GoFiles,
+		CompiledGoFiles: p.CompiledGoFiles,
+		OtherFiles:      p.OtherFiles,
+		ExportFile:      p.ExportFile,
+	}
+	if len(p.Imports) > 0 {
+		flat.Imports = make(map[string]string, len(p.Imports))
+		for path, ipkg := range p.Imports {
+			flat.Imports[path] = ipkg.ID
+		}
+	}
+	return json.Marshal(flat)
+}
+
+// UnmarshalJSON reads in a Package from its JSON format.
+// See MarshalJSON for details about the format accepted.
+func (p *Package) UnmarshalJSON(b []byte) error {
+	flat := &flatPackage{}
+	if err := json.Unmarshal(b, &flat); err != nil {
+		return err
+	}
+	*p = Package{
+		ID:              flat.ID,
+		Name:            flat.Name,
+		PkgPath:         flat.PkgPath,
+		Errors:          flat.Errors,
+		GoFiles:         flat.GoFiles,
+		CompiledGoFiles: flat.CompiledGoFiles,
+		OtherFiles:      flat.OtherFiles,
+		ExportFile:      flat.ExportFile,
+	}
+	if len(flat.Imports) > 0 {
+		p.Imports = make(map[string]*Package, len(flat.Imports))
+		for path, id := range flat.Imports {
+			p.Imports[path] = &Package{ID: id}
+		}
+	}
+	return nil
+}
+
+func (p *Package) String() string { return p.ID }
+
+// loaderPackage augments Package with state used during the loading phase
+type loaderPackage struct {
+	*Package
+	importErrors map[string]error // maps each bad import to its error
+	loadOnce     sync.Once
+	color        uint8 // for cycle detection
+	needsrc      bool  // load from source (Mode >= LoadTypes)
+	needtypes    bool  // type information is either requested or depended on
+	initial      bool  // package was matched by a pattern
+}
+
+// loader holds the working state of a single call to load.
+type loader struct {
+	pkgs map[string]*loaderPackage
+	Config
+	exportMu sync.Mutex // enforces mutual exclusion of exportdata operations
+}
+
+func newLoader(cfg *Config) *loader {
+	ld := &loader{}
+	if cfg != nil {
+		ld.Config = *cfg
+	}
+	if ld.Config.Env == nil {
+		ld.Config.Env = os.Environ()
+	}
+	if ld.Context == nil {
+		ld.Context = context.Background()
+	}
+	if ld.Dir == "" {
+		if dir, err := os.Getwd(); err == nil {
+			ld.Dir = dir
+		}
+	}
+
+	if ld.Mode >= LoadTypes {
+		if ld.Fset == nil {
+			ld.Fset = token.NewFileSet()
+		}
+
+		// ParseFile is required even in LoadTypes mode
+		// because we load source if export data is missing.
+		if ld.ParseFile == nil {
+			ld.ParseFile = func(fset *token.FileSet, filename string, src []byte) (*ast.File, error) {
+				var isrc interface{}
+				if src != nil {
+					isrc = src
+				}
+				const mode = parser.AllErrors | parser.ParseComments
+				return parser.ParseFile(fset, filename, isrc, mode)
+			}
+		}
+	}
+	return ld
+}
+
+// refine connects the supplied packages into a graph and then adds type and
+// and syntax information as requested by the LoadMode.
+func (ld *loader) refine(roots []string, list ...*Package) ([]*Package, error) {
+	isRoot := make(map[string]bool, len(roots))
+	for _, root := range roots {
+		isRoot[root] = true
+	}
+	ld.pkgs = make(map[string]*loaderPackage)
+	// first pass, fixup and build the map and roots
+	var initial []*loaderPackage
+	for _, pkg := range list {
+		lpkg := &loaderPackage{
+			Package: pkg,
+			needtypes: ld.Mode >= LoadAllSyntax ||
+				ld.Mode >= LoadTypes && isRoot[pkg.ID],
+			needsrc: ld.Mode >= LoadAllSyntax ||
+				ld.Mode >= LoadSyntax && isRoot[pkg.ID] ||
+				pkg.ExportFile == "" && pkg.PkgPath != "unsafe",
+		}
+		ld.pkgs[lpkg.ID] = lpkg
+		if isRoot[lpkg.ID] {
+			initial = append(initial, lpkg)
+			lpkg.initial = true
+		}
+	}
+
+	// Materialize the import graph.
+
+	const (
+		white = 0 // new
+		grey  = 1 // in progress
+		black = 2 // complete
+	)
+
+	// visit traverses the import graph, depth-first,
+	// and materializes the graph as Packages.Imports.
+	//
+	// Valid imports are saved in the Packages.Import map.
+	// Invalid imports (cycles and missing nodes) are saved in the importErrors map.
+	// Thus, even in the presence of both kinds of errors, the Import graph remains a DAG.
+	//
+	// visit returns whether the package needs src or has a transitive
+	// dependency on a package that does. These are the only packages
+	// for which we load source code.
+	var stack []*loaderPackage
+	var visit func(lpkg *loaderPackage) bool
+	var srcPkgs []*loaderPackage
+	visit = func(lpkg *loaderPackage) bool {
+		switch lpkg.color {
+		case black:
+			return lpkg.needsrc
+		case grey:
+			panic("internal error: grey node")
+		}
+		lpkg.color = grey
+		stack = append(stack, lpkg) // push
+		stubs := lpkg.Imports       // the structure form has only stubs with the ID in the Imports
+		lpkg.Imports = make(map[string]*Package, len(stubs))
+		for importPath, ipkg := range stubs {
+			var importErr error
+			imp := ld.pkgs[ipkg.ID]
+			if imp == nil {
+				// (includes package "C" when DisableCgo)
+				importErr = fmt.Errorf("missing package: %q", ipkg.ID)
+			} else if imp.color == grey {
+				importErr = fmt.Errorf("import cycle: %s", stack)
+			}
+			if importErr != nil {
+				if lpkg.importErrors == nil {
+					lpkg.importErrors = make(map[string]error)
+				}
+				lpkg.importErrors[importPath] = importErr
+				continue
+			}
+
+			if visit(imp) {
+				lpkg.needsrc = true
+			}
+			lpkg.Imports[importPath] = imp.Package
+		}
+		if lpkg.needsrc {
+			srcPkgs = append(srcPkgs, lpkg)
+		}
+		stack = stack[:len(stack)-1] // pop
+		lpkg.color = black
+
+		return lpkg.needsrc
+	}
+
+	if ld.Mode < LoadImports {
+		//we do this to drop the stub import packages that we are not even going to try to resolve
+		for _, lpkg := range initial {
+			lpkg.Imports = nil
+		}
+	} else {
+		// For each initial package, create its import DAG.
+		for _, lpkg := range initial {
+			visit(lpkg)
+		}
+	}
+	for _, lpkg := range srcPkgs {
+		// Complete type information is required for the
+		// immediate dependencies of each source package.
+		for _, ipkg := range lpkg.Imports {
+			imp := ld.pkgs[ipkg.ID]
+			imp.needtypes = true
+		}
+	}
+	// Load type data if needed, starting at
+	// the initial packages (roots of the import DAG).
+	if ld.Mode >= LoadTypes {
+		var wg sync.WaitGroup
+		for _, lpkg := range initial {
+			wg.Add(1)
+			go func(lpkg *loaderPackage) {
+				ld.loadRecursive(lpkg)
+				wg.Done()
+			}(lpkg)
+		}
+		wg.Wait()
+	}
+
+	result := make([]*Package, len(initial))
+	for i, lpkg := range initial {
+		result[i] = lpkg.Package
+	}
+	return result, nil
+}
+
+// loadRecursive loads the specified package and its dependencies,
+// recursively, in parallel, in topological order.
+// It is atomic and idempotent.
+// Precondition: ld.Mode >= LoadTypes.
+func (ld *loader) loadRecursive(lpkg *loaderPackage) {
+	lpkg.loadOnce.Do(func() {
+		// Load the direct dependencies, in parallel.
+		var wg sync.WaitGroup
+		for _, ipkg := range lpkg.Imports {
+			imp := ld.pkgs[ipkg.ID]
+			wg.Add(1)
+			go func(imp *loaderPackage) {
+				ld.loadRecursive(imp)
+				wg.Done()
+			}(imp)
+		}
+		wg.Wait()
+
+		ld.loadPackage(lpkg)
+	})
+}
+
+// loadPackage loads the specified package.
+// It must be called only once per Package,
+// after immediate dependencies are loaded.
+// Precondition: ld.Mode >= LoadTypes.
+func (ld *loader) loadPackage(lpkg *loaderPackage) {
+	if lpkg.PkgPath == "unsafe" {
+		// Fill in the blanks to avoid surprises.
+		lpkg.Types = types.Unsafe
+		lpkg.Fset = ld.Fset
+		lpkg.Syntax = []*ast.File{}
+		lpkg.TypesInfo = new(types.Info)
+		return
+	}
+
+	// Call NewPackage directly with explicit name.
+	// This avoids skew between golist and go/types when the files'
+	// package declarations are inconsistent.
+	lpkg.Types = types.NewPackage(lpkg.PkgPath, lpkg.Name)
+	lpkg.Fset = ld.Fset
+
+	// Subtle: we populate all Types fields with an empty Package
+	// before loading export data so that export data processing
+	// never has to create a types.Package for an indirect dependency,
+	// which would then require that such created packages be explicitly
+	// inserted back into the Import graph as a final step after export data loading.
+	// The Diamond test exercises this case.
+	if !lpkg.needtypes {
+		return
+	}
+	if !lpkg.needsrc {
+		ld.loadFromExportData(lpkg)
+		return // not a source package, don't get syntax trees
+	}
+
+	appendError := func(err error) {
+		// Convert various error types into the one true Error.
+		var errs []Error
+		switch err := err.(type) {
+		case Error:
+			// from driver
+			errs = append(errs, err)
+
+		case *os.PathError:
+			// from parser
+			errs = append(errs, Error{
+				Pos:  err.Path + ":1",
+				Msg:  err.Err.Error(),
+				Kind: ParseError,
+			})
+
+		case scanner.ErrorList:
+			// from parser
+			for _, err := range err {
+				errs = append(errs, Error{
+					Pos:  err.Pos.String(),
+					Msg:  err.Msg,
+					Kind: ParseError,
+				})
+			}
+
+		case types.Error:
+			// from type checker
+			errs = append(errs, Error{
+				Pos:  err.Fset.Position(err.Pos).String(),
+				Msg:  err.Msg,
+				Kind: TypeError,
+			})
+
+		default:
+			// unexpected impoverished error from parser?
+			errs = append(errs, Error{
+				Pos:  "-",
+				Msg:  err.Error(),
+				Kind: UnknownError,
+			})
+
+			// If you see this error message, please file a bug.
+			log.Printf("internal error: error %q (%T) without position", err, err)
+		}
+
+		lpkg.Errors = append(lpkg.Errors, errs...)
+	}
+
+	files, errs := ld.parseFiles(lpkg.CompiledGoFiles)
+	for _, err := range errs {
+		appendError(err)
+	}
+
+	lpkg.Syntax = files
+
+	lpkg.TypesInfo = &types.Info{
+		Types:      make(map[ast.Expr]types.TypeAndValue),
+		Defs:       make(map[*ast.Ident]types.Object),
+		Uses:       make(map[*ast.Ident]types.Object),
+		Implicits:  make(map[ast.Node]types.Object),
+		Scopes:     make(map[ast.Node]*types.Scope),
+		Selections: make(map[*ast.SelectorExpr]*types.Selection),
+	}
+
+	importer := importerFunc(func(path string) (*types.Package, error) {
+		if path == "unsafe" {
+			return types.Unsafe, nil
+		}
+
+		// The imports map is keyed by import path.
+		ipkg := lpkg.Imports[path]
+		if ipkg == nil {
+			if err := lpkg.importErrors[path]; err != nil {
+				return nil, err
+			}
+			// There was skew between the metadata and the
+			// import declarations, likely due to an edit
+			// race, or because the ParseFile feature was
+			// used to supply alternative file contents.
+			return nil, fmt.Errorf("no metadata for %s", path)
+		}
+
+		if ipkg.Types != nil && ipkg.Types.Complete() {
+			return ipkg.Types, nil
+		}
+		log.Fatalf("internal error: nil Pkg importing %q from %q", path, lpkg)
+		panic("unreachable")
+	})
+
+	// This is only an approximation.
+	// TODO(adonovan): derive Sizes from the underlying build system.
+	goarch := runtime.GOARCH
+	const goarchPrefix = "GOARCH="
+	for _, e := range ld.Config.Env {
+		if strings.HasPrefix(e, goarchPrefix) {
+			goarch = e[len(goarchPrefix):]
+		}
+	}
+	sizes := types.SizesFor("gc", goarch)
+
+	// type-check
+	tc := &types.Config{
+		Importer: importer,
+
+		// Type-check bodies of functions only in non-initial packages.
+		// Example: for import graph A->B->C and initial packages {A,C},
+		// we can ignore function bodies in B.
+		IgnoreFuncBodies: ld.Mode < LoadAllSyntax && !lpkg.initial,
+
+		Error: appendError,
+		Sizes: sizes,
+	}
+	types.NewChecker(tc, ld.Fset, lpkg.Types, lpkg.TypesInfo).Files(lpkg.Syntax)
+
+	lpkg.importErrors = nil // no longer needed
+
+	// If !Cgo, the type-checker uses FakeImportC mode, so
+	// it doesn't invoke the importer for import "C",
+	// nor report an error for the import,
+	// or for any undefined C.f reference.
+	// We must detect this explicitly and correctly
+	// mark the package as IllTyped (by reporting an error).
+	// TODO(adonovan): if these errors are annoying,
+	// we could just set IllTyped quietly.
+	if tc.FakeImportC {
+	outer:
+		for _, f := range lpkg.Syntax {
+			for _, imp := range f.Imports {
+				if imp.Path.Value == `"C"` {
+					err := types.Error{Fset: ld.Fset, Pos: imp.Pos(), Msg: `import "C" ignored`}
+					appendError(err)
+					break outer
+				}
+			}
+		}
+	}
+
+	// Record accumulated errors.
+	illTyped := len(lpkg.Errors) > 0
+	if !illTyped {
+		for _, imp := range lpkg.Imports {
+			if imp.IllTyped {
+				illTyped = true
+				break
+			}
+		}
+	}
+	lpkg.IllTyped = illTyped
+}
+
+// An importFunc is an implementation of the single-method
+// types.Importer interface based on a function value.
+type importerFunc func(path string) (*types.Package, error)
+
+func (f importerFunc) Import(path string) (*types.Package, error) { return f(path) }
+
+// We use a counting semaphore to limit
+// the number of parallel I/O calls per process.
+var ioLimit = make(chan bool, 20)
+
+// parseFiles reads and parses the Go source files and returns the ASTs
+// of the ones that could be at least partially parsed, along with a
+// list of I/O and parse errors encountered.
+//
+// Because files are scanned in parallel, the token.Pos
+// positions of the resulting ast.Files are not ordered.
+//
+func (ld *loader) parseFiles(filenames []string) ([]*ast.File, []error) {
+	var wg sync.WaitGroup
+	n := len(filenames)
+	parsed := make([]*ast.File, n)
+	errors := make([]error, n)
+	for i, file := range filenames {
+		wg.Add(1)
+		go func(i int, filename string) {
+			ioLimit <- true // wait
+			// ParseFile may return both an AST and an error.
+			var src []byte
+			for f, contents := range ld.Config.Overlay {
+				if sameFile(f, filename) {
+					src = contents
+				}
+			}
+			var err error
+			if src == nil {
+				src, err = ioutil.ReadFile(filename)
+			}
+			if err != nil {
+				parsed[i], errors[i] = nil, err
+			} else {
+				parsed[i], errors[i] = ld.ParseFile(ld.Fset, filename, src)
+			}
+			<-ioLimit // signal
+			wg.Done()
+		}(i, file)
+	}
+	wg.Wait()
+
+	// Eliminate nils, preserving order.
+	var o int
+	for _, f := range parsed {
+		if f != nil {
+			parsed[o] = f
+			o++
+		}
+	}
+	parsed = parsed[:o]
+
+	o = 0
+	for _, err := range errors {
+		if err != nil {
+			errors[o] = err
+			o++
+		}
+	}
+	errors = errors[:o]
+
+	return parsed, errors
+}
+
+// sameFile returns true if x and y have the same basename and denote
+// the same file.
+//
+func sameFile(x, y string) bool {
+	if filepath.Base(x) == filepath.Base(y) { // (optimisation)
+		if xi, err := os.Stat(x); err == nil {
+			if yi, err := os.Stat(y); err == nil {
+				return os.SameFile(xi, yi)
+			}
+		}
+	}
+	return false
+}
+
+// loadFromExportData returns type information for the specified
+// package, loading it from an export data file on the first request.
+func (ld *loader) loadFromExportData(lpkg *loaderPackage) (*types.Package, error) {
+	if lpkg.PkgPath == "" {
+		log.Fatalf("internal error: Package %s has no PkgPath", lpkg)
+	}
+
+	// Because gcexportdata.Read has the potential to create or
+	// modify the types.Package for each node in the transitive
+	// closure of dependencies of lpkg, all exportdata operations
+	// must be sequential. (Finer-grained locking would require
+	// changes to the gcexportdata API.)
+	//
+	// The exportMu lock guards the Package.Pkg field and the
+	// types.Package it points to, for each Package in the graph.
+	//
+	// Not all accesses to Package.Pkg need to be protected by exportMu:
+	// graph ordering ensures that direct dependencies of source
+	// packages are fully loaded before the importer reads their Pkg field.
+	ld.exportMu.Lock()
+	defer ld.exportMu.Unlock()
+
+	if tpkg := lpkg.Types; tpkg != nil && tpkg.Complete() {
+		return tpkg, nil // cache hit
+	}
+
+	lpkg.IllTyped = true // fail safe
+
+	if lpkg.ExportFile == "" {
+		// Errors while building export data will have been printed to stderr.
+		return nil, fmt.Errorf("no export data file")
+	}
+	f, err := os.Open(lpkg.ExportFile)
+	if err != nil {
+		return nil, err
+	}
+	defer f.Close()
+
+	// Read gc export data.
+	//
+	// We don't currently support gccgo export data because all
+	// underlying workspaces use the gc toolchain. (Even build
+	// systems that support gccgo don't use it for workspace
+	// queries.)
+	r, err := gcexportdata.NewReader(f)
+	if err != nil {
+		return nil, fmt.Errorf("reading %s: %v", lpkg.ExportFile, err)
+	}
+
+	// Build the view.
+	//
+	// The gcexportdata machinery has no concept of package ID.
+	// It identifies packages by their PkgPath, which although not
+	// globally unique is unique within the scope of one invocation
+	// of the linker, type-checker, or gcexportdata.
+	//
+	// So, we must build a PkgPath-keyed view of the global
+	// (conceptually ID-keyed) cache of packages and pass it to
+	// gcexportdata. The view must contain every existing
+	// package that might possibly be mentioned by the
+	// current package---its transitive closure.
+	//
+	// In loadPackage, we unconditionally create a types.Package for
+	// each dependency so that export data loading does not
+	// create new ones.
+	//
+	// TODO(adonovan): it would be simpler and more efficient
+	// if the export data machinery invoked a callback to
+	// get-or-create a package instead of a map.
+	//
+	view := make(map[string]*types.Package) // view seen by gcexportdata
+	seen := make(map[*loaderPackage]bool)   // all visited packages
+	var visit func(pkgs map[string]*Package)
+	visit = func(pkgs map[string]*Package) {
+		for _, p := range pkgs {
+			lpkg := ld.pkgs[p.ID]
+			if !seen[lpkg] {
+				seen[lpkg] = true
+				view[lpkg.PkgPath] = lpkg.Types
+				visit(lpkg.Imports)
+			}
+		}
+	}
+	visit(lpkg.Imports)
+
+	viewLen := len(view) + 1 // adding the self package
+	// Parse the export data.
+	// (May modify incomplete packages in view but not create new ones.)
+	tpkg, err := gcexportdata.Read(r, ld.Fset, view, lpkg.PkgPath)
+	if err != nil {
+		return nil, fmt.Errorf("reading %s: %v", lpkg.ExportFile, err)
+	}
+	if viewLen != len(view) {
+		log.Fatalf("Unexpected package creation during export data loading")
+	}
+
+	lpkg.Types = tpkg
+	lpkg.IllTyped = false
+
+	return tpkg, nil
+}
+
+func usesExportData(cfg *Config) bool {
+	return LoadTypes <= cfg.Mode && cfg.Mode < LoadAllSyntax
+}

vendor/golang.org/x/tools/go/packages/visit.go

@@ -0,0 +1,55 @@
+package packages
+
+import (
+	"fmt"
+	"os"
+	"sort"
+)
+
+// Visit visits all the packages in the import graph whose roots are
+// pkgs, calling the optional pre function the first time each package
+// is encountered (preorder), and the optional post function after a
+// package's dependencies have been visited (postorder).
+// The boolean result of pre(pkg) determines whether
+// the imports of package pkg are visited.
+func Visit(pkgs []*Package, pre func(*Package) bool, post func(*Package)) {
+	seen := make(map[*Package]bool)
+	var visit func(*Package)
+	visit = func(pkg *Package) {
+		if !seen[pkg] {
+			seen[pkg] = true
+
+			if pre == nil || pre(pkg) {
+				paths := make([]string, 0, len(pkg.Imports))
+				for path := range pkg.Imports {
+					paths = append(paths, path)
+				}
+				sort.Strings(paths) // for determinism
+				for _, path := range paths {
+					visit(pkg.Imports[path])
+				}
+			}
+
+			if post != nil {
+				post(pkg)
+			}
+		}
+	}
+	for _, pkg := range pkgs {
+		visit(pkg)
+	}
+}
+
+// PrintErrors prints to os.Stderr the accumulated errors of all
+// packages in the import graph rooted at pkgs, dependencies first.
+// PrintErrors returns the number of errors printed.
+func PrintErrors(pkgs []*Package) int {
+	var n int
+	Visit(pkgs, nil, func(pkg *Package) {
+		for _, err := range pkg.Errors {
+			fmt.Fprintln(os.Stderr, err)
+			n++
+		}
+	})
+	return n
+}

vendor/golang.org/x/tools/internal/fastwalk/fastwalk.go

@@ -0,0 +1,196 @@
+// Copyright 2016 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package fastwalk provides a faster version of filepath.Walk for file system
+// scanning tools.
+package fastwalk
+
+import (
+	"errors"
+	"os"
+	"path/filepath"
+	"runtime"
+	"sync"
+)
+
+// TraverseLink is used as a return value from WalkFuncs to indicate that the
+// symlink named in the call may be traversed.
+var TraverseLink = errors.New("fastwalk: traverse symlink, assuming target is a directory")
+
+// SkipFiles is a used as a return value from WalkFuncs to indicate that the
+// callback should not be called for any other files in the current directory.
+// Child directories will still be traversed.
+var SkipFiles = errors.New("fastwalk: skip remaining files in directory")
+
+// Walk is a faster implementation of filepath.Walk.
+//
+// filepath.Walk's design necessarily calls os.Lstat on each file,
+// even if the caller needs less info.
+// Many tools need only the type of each file.
+// On some platforms, this information is provided directly by the readdir
+// system call, avoiding the need to stat each file individually.
+// fastwalk_unix.go contains a fork of the syscall routines.
+//
+// See golang.org/issue/16399
+//
+// Walk walks the file tree rooted at root, calling walkFn for
+// each file or directory in the tree, including root.
+//
+// If fastWalk returns filepath.SkipDir, the directory is skipped.
+//
+// Unlike filepath.Walk:
+//   * file stat calls must be done by the user.
+//     The only provided metadata is the file type, which does not include
+//     any permission bits.
+//   * multiple goroutines stat the filesystem concurrently. The provided
+//     walkFn must be safe for concurrent use.
+//   * fastWalk can follow symlinks if walkFn returns the TraverseLink
+//     sentinel error. It is the walkFn's responsibility to prevent
+//     fastWalk from going into symlink cycles.
+func Walk(root string, walkFn func(path string, typ os.FileMode) error) error {
+	// TODO(bradfitz): make numWorkers configurable? We used a
+	// minimum of 4 to give the kernel more info about multiple
+	// things we want, in hopes its I/O scheduling can take
+	// advantage of that. Hopefully most are in cache. Maybe 4 is
+	// even too low of a minimum. Profile more.
+	numWorkers := 4
+	if n := runtime.NumCPU(); n > numWorkers {
+		numWorkers = n
+	}
+
+	// Make sure to wait for all workers to finish, otherwise
+	// walkFn could still be called after returning. This Wait call
+	// runs after close(e.donec) below.
+	var wg sync.WaitGroup
+	defer wg.Wait()
+
+	w := &walker{
+		fn:       walkFn,
+		enqueuec: make(chan walkItem, numWorkers), // buffered for performance
+		workc:    make(chan walkItem, numWorkers), // buffered for performance
+		donec:    make(chan struct{}),
+
+		// buffered for correctness & not leaking goroutines:
+		resc: make(chan error, numWorkers),
+	}
+	defer close(w.donec)
+
+	for i := 0; i < numWorkers; i++ {
+		wg.Add(1)
+		go w.doWork(&wg)
+	}
+	todo := []walkItem{{dir: root}}
+	out := 0
+	for {
+		workc := w.workc
+		var workItem walkItem
+		if len(todo) == 0 {
+			workc = nil
+		} else {
+			workItem = todo[len(todo)-1]
+		}
+		select {
+		case workc <- workItem:
+			todo = todo[:len(todo)-1]
+			out++
+		case it := <-w.enqueuec:
+			todo = append(todo, it)
+		case err := <-w.resc:
+			out--
+			if err != nil {
+				return err
+			}
+			if out == 0 && len(todo) == 0 {
+				// It's safe to quit here, as long as the buffered
+				// enqueue channel isn't also readable, which might
+				// happen if the worker sends both another unit of
+				// work and its result before the other select was
+				// scheduled and both w.resc and w.enqueuec were
+				// readable.
+				select {
+				case it := <-w.enqueuec:
+					todo = append(todo, it)
+				default:
+					return nil
+				}
+			}
+		}
+	}
+}
+
+// doWork reads directories as instructed (via workc) and runs the
+// user's callback function.
+func (w *walker) doWork(wg *sync.WaitGroup) {
+	defer wg.Done()
+	for {
+		select {
+		case <-w.donec:
+			return
+		case it := <-w.workc:
+			select {
+			case <-w.donec:
+				return
+			case w.resc <- w.walk(it.dir, !it.callbackDone):
+			}
+		}
+	}
+}
+
+type walker struct {
+	fn func(path string, typ os.FileMode) error
+
+	donec    chan struct{} // closed on fastWalk's return
+	workc    chan walkItem // to workers
+	enqueuec chan walkItem // from workers
+	resc     chan error    // from workers
+}
+
+type walkItem struct {
+	dir          string
+	callbackDone bool // callback already called; don't do it again
+}
+
+func (w *walker) enqueue(it walkItem) {
+	select {
+	case w.enqueuec <- it:
+	case <-w.donec:
+	}
+}
+
+func (w *walker) onDirEnt(dirName, baseName string, typ os.FileMode) error {
+	joined := dirName + string(os.PathSeparator) + baseName
+	if typ == os.ModeDir {
+		w.enqueue(walkItem{dir: joined})
+		return nil
+	}
+
+	err := w.fn(joined, typ)
+	if typ == os.ModeSymlink {
+		if err == TraverseLink {
+			// Set callbackDone so we don't call it twice for both the
+			// symlink-as-symlink and the symlink-as-directory later:
+			w.enqueue(walkItem{dir: joined, callbackDone: true})
+			return nil
+		}
+		if err == filepath.SkipDir {
+			// Permit SkipDir on symlinks too.
+			return nil
+		}
+	}
+	return err
+}
+
+func (w *walker) walk(root string, runUserCallback bool) error {
+	if runUserCallback {
+		err := w.fn(root, os.ModeDir)
+		if err == filepath.SkipDir {
+			return nil
+		}
+		if err != nil {
+			return err
+		}
+	}
+
+	return readDir(root, w.onDirEnt)
+}

vendor/golang.org/x/tools/internal/fastwalk/fastwalk_dirent_fileno.go

@@ -0,0 +1,13 @@
+// Copyright 2016 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build freebsd openbsd netbsd
+
+package fastwalk
+
+import "syscall"
+
+func direntInode(dirent *syscall.Dirent) uint64 {
+	return uint64(dirent.Fileno)
+}

vendor/golang.org/x/tools/internal/fastwalk/fastwalk_dirent_ino.go

@@ -0,0 +1,14 @@
+// Copyright 2016 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build linux darwin
+// +build !appengine
+
+package fastwalk
+
+import "syscall"
+
+func direntInode(dirent *syscall.Dirent) uint64 {
+	return uint64(dirent.Ino)
+}

vendor/golang.org/x/tools/internal/fastwalk/fastwalk_dirent_namlen_bsd.go

@@ -0,0 +1,13 @@
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build darwin freebsd openbsd netbsd
+
+package fastwalk
+
+import "syscall"
+
+func direntNamlen(dirent *syscall.Dirent) uint64 {
+	return uint64(dirent.Namlen)
+}

vendor/golang.org/x/tools/internal/fastwalk/fastwalk_dirent_namlen_linux.go

@@ -0,0 +1,24 @@
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build linux
+// +build !appengine
+
+package fastwalk
+
+import (
+	"bytes"
+	"syscall"
+	"unsafe"
+)
+
+func direntNamlen(dirent *syscall.Dirent) uint64 {
+	const fixedHdr = uint16(unsafe.Offsetof(syscall.Dirent{}.Name))
+	nameBuf := (*[unsafe.Sizeof(dirent.Name)]byte)(unsafe.Pointer(&dirent.Name[0]))
+	nameLen := bytes.IndexByte(nameBuf[:dirent.Reclen-fixedHdr], 0)
+	if nameLen < 0 {
+		panic("failed to find terminating 0 byte in dirent")
+	}
+	return uint64(nameLen)
+}

vendor/golang.org/x/tools/internal/fastwalk/fastwalk_portable.go

@@ -0,0 +1,37 @@
+// Copyright 2016 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build appengine !linux,!darwin,!freebsd,!openbsd,!netbsd
+
+package fastwalk
+
+import (
+	"io/ioutil"
+	"os"
+)
+
+// readDir calls fn for each directory entry in dirName.
+// It does not descend into directories or follow symlinks.
+// If fn returns a non-nil error, readDir returns with that error
+// immediately.
+func readDir(dirName string, fn func(dirName, entName string, typ os.FileMode) error) error {
+	fis, err := ioutil.ReadDir(dirName)
+	if err != nil {
+		return err
+	}
+	skipFiles := false
+	for _, fi := range fis {
+		if fi.Mode().IsRegular() && skipFiles {
+			continue
+		}
+		if err := fn(dirName, fi.Name(), fi.Mode()&os.ModeType); err != nil {
+			if err == SkipFiles {
+				skipFiles = true
+				continue
+			}
+			return err
+		}
+	}
+	return nil
+}

vendor/golang.org/x/tools/internal/fastwalk/fastwalk_unix.go

@@ -0,0 +1,127 @@
+// Copyright 2016 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build linux darwin freebsd openbsd netbsd
+// +build !appengine
+
+package fastwalk
+
+import (
+	"fmt"
+	"os"
+	"syscall"
+	"unsafe"
+)
+
+const blockSize = 8 << 10
+
+// unknownFileMode is a sentinel (and bogus) os.FileMode
+// value used to represent a syscall.DT_UNKNOWN Dirent.Type.
+const unknownFileMode os.FileMode = os.ModeNamedPipe | os.ModeSocket | os.ModeDevice
+
+func readDir(dirName string, fn func(dirName, entName string, typ os.FileMode) error) error {
+	fd, err := syscall.Open(dirName, 0, 0)
+	if err != nil {
+		return &os.PathError{Op: "open", Path: dirName, Err: err}
+	}
+	defer syscall.Close(fd)
+
+	// The buffer must be at least a block long.
+	buf := make([]byte, blockSize) // stack-allocated; doesn't escape
+	bufp := 0                      // starting read position in buf
+	nbuf := 0                      // end valid data in buf
+	skipFiles := false
+	for {
+		if bufp >= nbuf {
+			bufp = 0
+			nbuf, err = syscall.ReadDirent(fd, buf)
+			if err != nil {
+				return os.NewSyscallError("readdirent", err)
+			}
+			if nbuf <= 0 {
+				return nil
+			}
+		}
+		consumed, name, typ := parseDirEnt(buf[bufp:nbuf])
+		bufp += consumed
+		if name == "" || name == "." || name == ".." {
+			continue
+		}
+		// Fallback for filesystems (like old XFS) that don't
+		// support Dirent.Type and have DT_UNKNOWN (0) there
+		// instead.
+		if typ == unknownFileMode {
+			fi, err := os.Lstat(dirName + "/" + name)
+			if err != nil {
+				// It got deleted in the meantime.
+				if os.IsNotExist(err) {
+					continue
+				}
+				return err
+			}
+			typ = fi.Mode() & os.ModeType
+		}
+		if skipFiles && typ.IsRegular() {
+			continue
+		}
+		if err := fn(dirName, name, typ); err != nil {
+			if err == SkipFiles {
+				skipFiles = true
+				continue
+			}
+			return err
+		}
+	}
+}
+
+func parseDirEnt(buf []byte) (consumed int, name string, typ os.FileMode) {
+	// golang.org/issue/15653
+	dirent := (*syscall.Dirent)(unsafe.Pointer(&buf[0]))
+	if v := unsafe.Offsetof(dirent.Reclen) + unsafe.Sizeof(dirent.Reclen); uintptr(len(buf)) < v {
+		panic(fmt.Sprintf("buf size of %d smaller than dirent header size %d", len(buf), v))
+	}
+	if len(buf) < int(dirent.Reclen) {
+		panic(fmt.Sprintf("buf size %d < record length %d", len(buf), dirent.Reclen))
+	}
+	consumed = int(dirent.Reclen)
+	if direntInode(dirent) == 0 { // File absent in directory.
+		return
+	}
+	switch dirent.Type {
+	case syscall.DT_REG:
+		typ = 0
+	case syscall.DT_DIR:
+		typ = os.ModeDir
+	case syscall.DT_LNK:
+		typ = os.ModeSymlink
+	case syscall.DT_BLK:
+		typ = os.ModeDevice
+	case syscall.DT_FIFO:
+		typ = os.ModeNamedPipe
+	case syscall.DT_SOCK:
+		typ = os.ModeSocket
+	case syscall.DT_UNKNOWN:
+		typ = unknownFileMode
+	default:
+		// Skip weird things.
+		// It's probably a DT_WHT (http://lwn.net/Articles/325369/)
+		// or something. Revisit if/when this package is moved outside
+		// of goimports. goimports only cares about regular files,
+		// symlinks, and directories.
+		return
+	}
+
+	nameBuf := (*[unsafe.Sizeof(dirent.Name)]byte)(unsafe.Pointer(&dirent.Name[0]))
+	nameLen := direntNamlen(dirent)
+
+	// Special cases for common things:
+	if nameLen == 1 && nameBuf[0] == '.' {
+		name = "."
+	} else if nameLen == 2 && nameBuf[0] == '.' && nameBuf[1] == '.' {
+		name = ".."
+	} else {
+		name = string(nameBuf[:nameLen])
+	}
+	return
+}

vendor/golang.org/x/tools/internal/gopathwalk/walk.go

@@ -0,0 +1,246 @@
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package gopathwalk is like filepath.Walk but specialized for finding Go
+// packages, particularly in $GOPATH and $GOROOT.
+package gopathwalk
+
+import (
+	"bufio"
+	"bytes"
+	"fmt"
+	"go/build"
+	"golang.org/x/tools/internal/fastwalk"
+	"io/ioutil"
+	"log"
+	"os"
+	"path/filepath"
+	"strings"
+)
+
+// Options controls the behavior of a Walk call.
+type Options struct {
+	Debug          bool // Enable debug logging
+	ModulesEnabled bool // Search module caches. Also disables legacy goimports ignore rules.
+}
+
+// RootType indicates the type of a Root.
+type RootType int
+
+const (
+	RootUnknown RootType = iota
+	RootGOROOT
+	RootGOPATH
+	RootCurrentModule
+	RootModuleCache
+)
+
+// A Root is a starting point for a Walk.
+type Root struct {
+	Path string
+	Type RootType
+}
+
+// SrcDirsRoots returns the roots from build.Default.SrcDirs(). Not modules-compatible.
+func SrcDirsRoots() []Root {
+	var roots []Root
+	roots = append(roots, Root{filepath.Join(build.Default.GOROOT, "src"), RootGOROOT})
+	for _, p := range filepath.SplitList(build.Default.GOPATH) {
+		roots = append(roots, Root{filepath.Join(p, "src"), RootGOPATH})
+	}
+	return roots
+}
+
+// Walk walks Go source directories ($GOROOT, $GOPATH, etc) to find packages.
+// For each package found, add will be called (concurrently) with the absolute
+// paths of the containing source directory and the package directory.
+// add will be called concurrently.
+func Walk(roots []Root, add func(root Root, dir string), opts Options) {
+	for _, root := range roots {
+		walkDir(root, add, opts)
+	}
+}
+
+func walkDir(root Root, add func(Root, string), opts Options) {
+	if _, err := os.Stat(root.Path); os.IsNotExist(err) {
+		if opts.Debug {
+			log.Printf("skipping nonexistant directory: %v", root.Path)
+		}
+		return
+	}
+	if opts.Debug {
+		log.Printf("scanning %s", root.Path)
+	}
+	w := &walker{
+		root: root,
+		add:  add,
+		opts: opts,
+	}
+	w.init()
+	if err := fastwalk.Walk(root.Path, w.walk); err != nil {
+		log.Printf("gopathwalk: scanning directory %v: %v", root.Path, err)
+	}
+
+	if opts.Debug {
+		log.Printf("scanned %s", root.Path)
+	}
+}
+
+// walker is the callback for fastwalk.Walk.
+type walker struct {
+	root Root               // The source directory to scan.
+	add  func(Root, string) // The callback that will be invoked for every possible Go package dir.
+	opts Options            // Options passed to Walk by the user.
+
+	ignoredDirs []os.FileInfo // The ignored directories, loaded from .goimportsignore files.
+}
+
+// init initializes the walker based on its Options.
+func (w *walker) init() {
+	var ignoredPaths []string
+	if w.root.Type == RootModuleCache {
+		ignoredPaths = []string{"cache"}
+	}
+	if !w.opts.ModulesEnabled && w.root.Type == RootGOPATH {
+		ignoredPaths = w.getIgnoredDirs(w.root.Path)
+		ignoredPaths = append(ignoredPaths, "v", "mod")
+	}
+
+	for _, p := range ignoredPaths {
+		full := filepath.Join(w.root.Path, p)
+		if fi, err := os.Stat(full); err == nil {
+			w.ignoredDirs = append(w.ignoredDirs, fi)
+			if w.opts.Debug {
+				log.Printf("Directory added to ignore list: %s", full)
+			}
+		} else if w.opts.Debug {
+			log.Printf("Error statting ignored directory: %v", err)
+		}
+	}
+}
+
+// getIgnoredDirs reads an optional config file at <path>/.goimportsignore
+// of relative directories to ignore when scanning for go files.
+// The provided path is one of the $GOPATH entries with "src" appended.
+func (w *walker) getIgnoredDirs(path string) []string {
+	file := filepath.Join(path, ".goimportsignore")
+	slurp, err := ioutil.ReadFile(file)
+	if w.opts.Debug {
+		if err != nil {
+			log.Print(err)
+		} else {
+			log.Printf("Read %s", file)
+		}
+	}
+	if err != nil {
+		return nil
+	}
+
+	var ignoredDirs []string
+	bs := bufio.NewScanner(bytes.NewReader(slurp))
+	for bs.Scan() {
+		line := strings.TrimSpace(bs.Text())
+		if line == "" || strings.HasPrefix(line, "#") {
+			continue
+		}
+		ignoredDirs = append(ignoredDirs, line)
+	}
+	return ignoredDirs
+}
+
+func (w *walker) shouldSkipDir(fi os.FileInfo) bool {
+	for _, ignoredDir := range w.ignoredDirs {
+		if os.SameFile(fi, ignoredDir) {
+			return true
+		}
+	}
+	return false
+}
+
+func (w *walker) walk(path string, typ os.FileMode) error {
+	dir := filepath.Dir(path)
+	if typ.IsRegular() {
+		if dir == w.root.Path {
+			// Doesn't make sense to have regular files
+			// directly in your $GOPATH/src or $GOROOT/src.
+			return fastwalk.SkipFiles
+		}
+		if !strings.HasSuffix(path, ".go") {
+			return nil
+		}
+
+		w.add(w.root, dir)
+		return fastwalk.SkipFiles
+	}
+	if typ == os.ModeDir {
+		base := filepath.Base(path)
+		if base == "" || base[0] == '.' || base[0] == '_' ||
+			base == "testdata" || (!w.opts.ModulesEnabled && base == "node_modules") {
+			return filepath.SkipDir
+		}
+		fi, err := os.Lstat(path)
+		if err == nil && w.shouldSkipDir(fi) {
+			return filepath.SkipDir
+		}
+		return nil
+	}
+	if typ == os.ModeSymlink {
+		base := filepath.Base(path)
+		if strings.HasPrefix(base, ".#") {
+			// Emacs noise.
+			return nil
+		}
+		fi, err := os.Lstat(path)
+		if err != nil {
+			// Just ignore it.
+			return nil
+		}
+		if w.shouldTraverse(dir, fi) {
+			return fastwalk.TraverseLink
+		}
+	}
+	return nil
+}
+
+// shouldTraverse reports whether the symlink fi, found in dir,
+// should be followed.  It makes sure symlinks were never visited
+// before to avoid symlink loops.
+func (w *walker) shouldTraverse(dir string, fi os.FileInfo) bool {
+	path := filepath.Join(dir, fi.Name())
+	target, err := filepath.EvalSymlinks(path)
+	if err != nil {
+		return false
+	}
+	ts, err := os.Stat(target)
+	if err != nil {
+		fmt.Fprintln(os.Stderr, err)
+		return false
+	}
+	if !ts.IsDir() {
+		return false
+	}
+	if w.shouldSkipDir(ts) {
+		return false
+	}
+	// Check for symlink loops by statting each directory component
+	// and seeing if any are the same file as ts.
+	for {
+		parent := filepath.Dir(path)
+		if parent == path {
+			// Made it to the root without seeing a cycle.
+			// Use this symlink.
+			return true
+		}
+		parentInfo, err := os.Stat(parent)
+		if err != nil {
+			return false
+		}
+		if os.SameFile(ts, parentInfo) {
+			// Cycle. Don't traverse.
+			return false
+		}
+		path = parent
+	}
+
+}

vendor/golang.org/x/tools/internal/semver/semver.go

@@ -0,0 +1,388 @@
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package semver implements comparison of semantic version strings.
+// In this package, semantic version strings must begin with a leading "v",
+// as in "v1.0.0".
+//
+// The general form of a semantic version string accepted by this package is
+//
+//	vMAJOR[.MINOR[.PATCH[-PRERELEASE][+BUILD]]]
+//
+// where square brackets indicate optional parts of the syntax;
+// MAJOR, MINOR, and PATCH are decimal integers without extra leading zeros;
+// PRERELEASE and BUILD are each a series of non-empty dot-separated identifiers
+// using only alphanumeric characters and hyphens; and
+// all-numeric PRERELEASE identifiers must not have leading zeros.
+//
+// This package follows Semantic Versioning 2.0.0 (see semver.org)
+// with two exceptions. First, it requires the "v" prefix. Second, it recognizes
+// vMAJOR and vMAJOR.MINOR (with no prerelease or build suffixes)
+// as shorthands for vMAJOR.0.0 and vMAJOR.MINOR.0.
+package semver
+
+// parsed returns the parsed form of a semantic version string.
+type parsed struct {
+	major      string
+	minor      string
+	patch      string
+	short      string
+	prerelease string
+	build      string
+	err        string
+}
+
+// IsValid reports whether v is a valid semantic version string.
+func IsValid(v string) bool {
+	_, ok := parse(v)
+	return ok
+}
+
+// Canonical returns the canonical formatting of the semantic version v.
+// It fills in any missing .MINOR or .PATCH and discards build metadata.
+// Two semantic versions compare equal only if their canonical formattings
+// are identical strings.
+// The canonical invalid semantic version is the empty string.
+func Canonical(v string) string {
+	p, ok := parse(v)
+	if !ok {
+		return ""
+	}
+	if p.build != "" {
+		return v[:len(v)-len(p.build)]
+	}
+	if p.short != "" {
+		return v + p.short
+	}
+	return v
+}
+
+// Major returns the major version prefix of the semantic version v.
+// For example, Major("v2.1.0") == "v2".
+// If v is an invalid semantic version string, Major returns the empty string.
+func Major(v string) string {
+	pv, ok := parse(v)
+	if !ok {
+		return ""
+	}
+	return v[:1+len(pv.major)]
+}
+
+// MajorMinor returns the major.minor version prefix of the semantic version v.
+// For example, MajorMinor("v2.1.0") == "v2.1".
+// If v is an invalid semantic version string, MajorMinor returns the empty string.
+func MajorMinor(v string) string {
+	pv, ok := parse(v)
+	if !ok {
+		return ""
+	}
+	i := 1 + len(pv.major)
+	if j := i + 1 + len(pv.minor); j <= len(v) && v[i] == '.' && v[i+1:j] == pv.minor {
+		return v[:j]
+	}
+	return v[:i] + "." + pv.minor
+}
+
+// Prerelease returns the prerelease suffix of the semantic version v.
+// For example, Prerelease("v2.1.0-pre+meta") == "-pre".
+// If v is an invalid semantic version string, Prerelease returns the empty string.
+func Prerelease(v string) string {
+	pv, ok := parse(v)
+	if !ok {
+		return ""
+	}
+	return pv.prerelease
+}
+
+// Build returns the build suffix of the semantic version v.
+// For example, Build("v2.1.0+meta") == "+meta".
+// If v is an invalid semantic version string, Build returns the empty string.
+func Build(v string) string {
+	pv, ok := parse(v)
+	if !ok {
+		return ""
+	}
+	return pv.build
+}
+
+// Compare returns an integer comparing two versions according to
+// according to semantic version precedence.
+// The result will be 0 if v == w, -1 if v < w, or +1 if v > w.
+//
+// An invalid semantic version string is considered less than a valid one.
+// All invalid semantic version strings compare equal to each other.
+func Compare(v, w string) int {
+	pv, ok1 := parse(v)
+	pw, ok2 := parse(w)
+	if !ok1 && !ok2 {
+		return 0
+	}
+	if !ok1 {
+		return -1
+	}
+	if !ok2 {
+		return +1
+	}
+	if c := compareInt(pv.major, pw.major); c != 0 {
+		return c
+	}
+	if c := compareInt(pv.minor, pw.minor); c != 0 {
+		return c
+	}
+	if c := compareInt(pv.patch, pw.patch); c != 0 {
+		return c
+	}
+	return comparePrerelease(pv.prerelease, pw.prerelease)
+}
+
+// Max canonicalizes its arguments and then returns the version string
+// that compares greater.
+func Max(v, w string) string {
+	v = Canonical(v)
+	w = Canonical(w)
+	if Compare(v, w) > 0 {
+		return v
+	}
+	return w
+}
+
+func parse(v string) (p parsed, ok bool) {
+	if v == "" || v[0] != 'v' {
+		p.err = "missing v prefix"
+		return
+	}
+	p.major, v, ok = parseInt(v[1:])
+	if !ok {
+		p.err = "bad major version"
+		return
+	}
+	if v == "" {
+		p.minor = "0"
+		p.patch = "0"
+		p.short = ".0.0"
+		return
+	}
+	if v[0] != '.' {
+		p.err = "bad minor prefix"
+		ok = false
+		return
+	}
+	p.minor, v, ok = parseInt(v[1:])
+	if !ok {
+		p.err = "bad minor version"
+		return
+	}
+	if v == "" {
+		p.patch = "0"
+		p.short = ".0"
+		return
+	}
+	if v[0] != '.' {
+		p.err = "bad patch prefix"
+		ok = false
+		return
+	}
+	p.patch, v, ok = parseInt(v[1:])
+	if !ok {
+		p.err = "bad patch version"
+		return
+	}
+	if len(v) > 0 && v[0] == '-' {
+		p.prerelease, v, ok = parsePrerelease(v)
+		if !ok {
+			p.err = "bad prerelease"
+			return
+		}
+	}
+	if len(v) > 0 && v[0] == '+' {
+		p.build, v, ok = parseBuild(v)
+		if !ok {
+			p.err = "bad build"
+			return
+		}
+	}
+	if v != "" {
+		p.err = "junk on end"
+		ok = false
+		return
+	}
+	ok = true
+	return
+}
+
+func parseInt(v string) (t, rest string, ok bool) {
+	if v == "" {
+		return
+	}
+	if v[0] < '0' || '9' < v[0] {
+		return
+	}
+	i := 1
+	for i < len(v) && '0' <= v[i] && v[i] <= '9' {
+		i++
+	}
+	if v[0] == '0' && i != 1 {
+		return
+	}
+	return v[:i], v[i:], true
+}
+
+func parsePrerelease(v string) (t, rest string, ok bool) {
+	// "A pre-release version MAY be denoted by appending a hyphen and
+	// a series of dot separated identifiers immediately following the patch version.
+	// Identifiers MUST comprise only ASCII alphanumerics and hyphen [0-9A-Za-z-].
+	// Identifiers MUST NOT be empty. Numeric identifiers MUST NOT include leading zeroes."
+	if v == "" || v[0] != '-' {
+		return
+	}
+	i := 1
+	start := 1
+	for i < len(v) && v[i] != '+' {
+		if !isIdentChar(v[i]) && v[i] != '.' {
+			return
+		}
+		if v[i] == '.' {
+			if start == i || isBadNum(v[start:i]) {
+				return
+			}
+			start = i + 1
+		}
+		i++
+	}
+	if start == i || isBadNum(v[start:i]) {
+		return
+	}
+	return v[:i], v[i:], true
+}
+
+func parseBuild(v string) (t, rest string, ok bool) {
+	if v == "" || v[0] != '+' {
+		return
+	}
+	i := 1
+	start := 1
+	for i < len(v) {
+		if !isIdentChar(v[i]) {
+			return
+		}
+		if v[i] == '.' {
+			if start == i {
+				return
+			}
+			start = i + 1
+		}
+		i++
+	}
+	if start == i {
+		return
+	}
+	return v[:i], v[i:], true
+}
+
+func isIdentChar(c byte) bool {
+	return 'A' <= c && c <= 'Z' || 'a' <= c && c <= 'z' || '0' <= c && c <= '9' || c == '-'
+}
+
+func isBadNum(v string) bool {
+	i := 0
+	for i < len(v) && '0' <= v[i] && v[i] <= '9' {
+		i++
+	}
+	return i == len(v) && i > 1 && v[0] == '0'
+}
+
+func isNum(v string) bool {
+	i := 0
+	for i < len(v) && '0' <= v[i] && v[i] <= '9' {
+		i++
+	}
+	return i == len(v)
+}
+
+func compareInt(x, y string) int {
+	if x == y {
+		return 0
+	}
+	if len(x) < len(y) {
+		return -1
+	}
+	if len(x) > len(y) {
+		return +1
+	}
+	if x < y {
+		return -1
+	} else {
+		return +1
+	}
+}
+
+func comparePrerelease(x, y string) int {
+	// "When major, minor, and patch are equal, a pre-release version has
+	// lower precedence than a normal version.
+	// Example: 1.0.0-alpha < 1.0.0.
+	// Precedence for two pre-release versions with the same major, minor,
+	// and patch version MUST be determined by comparing each dot separated
+	// identifier from left to right until a difference is found as follows:
+	// identifiers consisting of only digits are compared numerically and
+	// identifiers with letters or hyphens are compared lexically in ASCII
+	// sort order. Numeric identifiers always have lower precedence than
+	// non-numeric identifiers. A larger set of pre-release fields has a
+	// higher precedence than a smaller set, if all of the preceding
+	// identifiers are equal.
+	// Example: 1.0.0-alpha < 1.0.0-alpha.1 < 1.0.0-alpha.beta <
+	// 1.0.0-beta < 1.0.0-beta.2 < 1.0.0-beta.11 < 1.0.0-rc.1 < 1.0.0."
+	if x == y {
+		return 0
+	}
+	if x == "" {
+		return +1
+	}
+	if y == "" {
+		return -1
+	}
+	for x != "" && y != "" {
+		x = x[1:] // skip - or .
+		y = y[1:] // skip - or .
+		var dx, dy string
+		dx, x = nextIdent(x)
+		dy, y = nextIdent(y)
+		if dx != dy {
+			ix := isNum(dx)
+			iy := isNum(dy)
+			if ix != iy {
+				if ix {
+					return -1
+				} else {
+					return +1
+				}
+			}
+			if ix {
+				if len(dx) < len(dy) {
+					return -1
+				}
+				if len(dx) > len(dy) {
+					return +1
+				}
+			}
+			if dx < dy {
+				return -1
+			} else {
+				return +1
+			}
+		}
+	}
+	if x == "" {
+		return -1
+	} else {
+		return +1
+	}
+}
+
+func nextIdent(x string) (dx, rest string) {
+	i := 0
+	for i < len(x) && x[i] != '.' {
+		i++
+	}
+	return x[:i], x[i:]
+}

vendor/honnef.co/go/tools/arg/arg.go

@@ -0,0 +1,48 @@
+package arg
+
+var args = map[string]int{
+	"(*encoding/json.Decoder).Decode.v":    0,
+	"(*encoding/json.Encoder).Encode.v":    0,
+	"(*encoding/xml.Decoder).Decode.v":     0,
+	"(*encoding/xml.Encoder).Encode.v":     0,
+	"(*sync.Pool).Put.x":                   0,
+	"(*text/template.Template).Parse.text": 0,
+	"(io.Seeker).Seek.offset":              0,
+	"(time.Time).Sub.u":                    0,
+	"append.elems":                         1,
+	"append.slice":                         0,
+	"bytes.Equal.a":                        0,
+	"bytes.Equal.b":                        1,
+	"encoding/binary.Write.data":           2,
+	"errors.New.text":                      0,
+	"fmt.Fprintf.format":                   1,
+	"fmt.Printf.format":                    0,
+	"fmt.Sprintf.a[0]":                     1,
+	"fmt.Sprintf.format":                   0,
+	"json.Marshal.v":                       0,
+	"json.Unmarshal.v":                     1,
+	"len.v":                                0,
+	"make.size[0]":                         1,
+	"make.size[1]":                         2,
+	"make.t":                               0,
+	"net/url.Parse.rawurl":                 0,
+	"os.OpenFile.flag":                     1,
+	"os/exec.Command.name":                 0,
+	"os/signal.Notify.c":                   0,
+	"regexp.Compile.expr":                  0,
+	"runtime.SetFinalizer.finalizer":       1,
+	"runtime.SetFinalizer.obj":             0,
+	"sort.Sort.data":                       0,
+	"time.Parse.layout":                    0,
+	"time.Sleep.d":                         0,
+	"xml.Marshal.v":                        0,
+	"xml.Unmarshal.v":                      1,
+}
+
+func Arg(name string) int {
+	n, ok := args[name]
+	if !ok {
+		panic("unknown argument " + name)
+	}
+	return n
+}

vendor/honnef.co/go/tools/cmd/gosimple/README.md

@@ -1,15 +0,0 @@
-# gosimple
-
-_gosimple_ is a linter for Go source code that specialises on
-simplifying code.
-
-## Installation
-
-Gosimple requires Go 1.6 or later.
-
-    go get honnef.co/go/tools/cmd/gosimple
-
-## Documentation
-
-Detailed documentation can be found on
-[staticcheck.io](https://staticcheck.io/docs/gosimple).

vendor/honnef.co/go/tools/cmd/gosimple/gosimple.go

@@ -1,21 +0,0 @@
-// gosimple detects code that could be rewritten in a simpler way.
-package main // import "honnef.co/go/tools/cmd/gosimple"
-import (
-	"os"
-
-	"honnef.co/go/tools/lint/lintutil"
-	"honnef.co/go/tools/simple"
-)
-
-func main() {
-	fs := lintutil.FlagSet("gosimple")
-	gen := fs.Bool("generated", false, "Check generated code")
-	fs.Parse(os.Args[1:])
-	c := simple.NewChecker()
-	c.CheckGenerated = *gen
-	cfg := lintutil.CheckerConfig{
-		Checker:     c,
-		ExitNonZero: true,
-	}
-	lintutil.ProcessFlagSet([]lintutil.CheckerConfig{cfg}, fs)
-}

vendor/honnef.co/go/tools/cmd/staticcheck/README.md

@@ -1,16 +1,15 @@
 # staticcheck
 
-_staticcheck_ is `go vet` on steroids, applying a ton of static analysis
+_staticcheck_ offers extensive analysis of Go code, covering a myriad
-checks you might be used to from tools like ReSharper for C#.
+of categories. It will detect bugs, suggest code simplifications,
+point out dead code, and more.
 
 ## Installation
 
-Staticcheck requires Go 1.6 or later.
+See [the main README](https://github.com/dominikh/go-tools#installation) for installation instructions.
-
-    go get honnef.co/go/tools/cmd/staticcheck
 
 ## Documentation
 
 Detailed documentation can be found on
-[staticcheck.io](https://staticcheck.io/docs/staticcheck).
+[staticcheck.io](https://staticcheck.io/docs/).
 

vendor/honnef.co/go/tools/cmd/staticcheck/staticcheck.go

@@ -1,23 +1,30 @@
-// staticcheck detects a myriad of bugs and inefficiencies in your
+// staticcheck analyses Go code and makes it better.
-// code.
 package main // import "honnef.co/go/tools/cmd/staticcheck"
 
 import (
 	"os"
 
+	"honnef.co/go/tools/lint"
 	"honnef.co/go/tools/lint/lintutil"
+	"honnef.co/go/tools/simple"
 	"honnef.co/go/tools/staticcheck"
+	"honnef.co/go/tools/stylecheck"
+	"honnef.co/go/tools/unused"
 )
 
 func main() {
 	fs := lintutil.FlagSet("staticcheck")
-	gen := fs.Bool("generated", false, "Check generated code")
 	fs.Parse(os.Args[1:])
-	c := staticcheck.NewChecker()
+
-	c.CheckGenerated = *gen
+	checkers := []lint.Checker{
-	cfg := lintutil.CheckerConfig{
+		simple.NewChecker(),
-		Checker:     c,
+		staticcheck.NewChecker(),
-		ExitNonZero: true,
+		stylecheck.NewChecker(),
 	}
-	lintutil.ProcessFlagSet([]lintutil.CheckerConfig{cfg}, fs)
+
+	uc := unused.NewChecker(unused.CheckAll)
+	uc.ConsiderReflection = true
+	checkers = append(checkers, unused.NewLintChecker(uc))
+
+	lintutil.ProcessFlagSet(checkers, fs)
 }

vendor/honnef.co/go/tools/cmd/unused/README.md

@@ -1,131 +0,0 @@
-# unused
-
-_unused_ checks Go code for unused constants, variables, functions and
-types.
-
-## Install
-
-	go get honnef.co/go/tools/cmd/unused
-
-## Usage
-
-	unused -help
-
-## Usage Tips
-
-- When running _unused_ on multiple packages, it will first try to
-  check them all at once, because that's faster. If any of the
-  packages don't compile, however, _unused_ will check each package
-  individually.
-
-  The first step can, depending on the number of packages, use a lot
-  of memory. For the entire standard library, it uses roughly 800 MB.
-  For a GOPATH with thousands of packages, it can quickly use several
-  gigabytes. If that is an issue, consider using something like this
-  instead:
-
-  ```
-  for pkg in $(go list your_selection); do unused "$pkg"; done
-  ```
-
-  This will effectively skip the first step and always check every
-  package individually.
-
-## What counts as used/unused?
-
-_unused_ checks for unused constants, functions, types and optionally
-struct fields. They will be considered used or unused under the
-following conditions:
-
-- Unexported package-level objects will be reported as unused if there
-  are no explicit references to them.
-
-- Unexported methods will be reported as unused if there are no
-  explicit references to them and if they don't implement any
-  interfaces.
-
-- The `main` function is considered as used if it's in the `main`
-  package.
-
-- `init` functions are always considered as used.
-
-- Exported objects in function scope are treated like unexported
-  objects.
-
-- Exported functions in tests are treated like unexported functions,
-  unless they're test, benchmark or example functions.
-
-- Struct fields will be considered as unused if there are no explicit
-  references to them. Unkeyed composite literals with >=1 elements
-  mark all fields of the struct as used.
-
-- Neither the checks for methods nor for struct fields are aware of
-  the reflect package and may thus produce false positives.
-
-## Whole program analysis
-
-Optionally via the `-exported` flag, _unused_ can analyse all
-arguments as a single program and report unused exported identifiers.
-This can be useful for checking "internal" packages, or large software
-projects that do not export an API to the public, but use exported
-methods between components.
-
-Do note that in the whole-program analysis, all arguments must
-type-check. It is not possible to check packages individually in this
-mode.
-
-## Examples
-
-```
-$ time unused cmd/go
-/usr/lib/go/src/cmd/go/build.go:1327:6: func hasString is unused
-/usr/lib/go/src/cmd/go/build.go:2328:6: func toolVerify is unused
-/usr/lib/go/src/cmd/go/generate.go:375:21: func identLength is unused
-/usr/lib/go/src/cmd/go/get.go:474:5: var goTag is unused
-/usr/lib/go/src/cmd/go/get.go:513:6: func cmpGoVersion is unused
-/usr/lib/go/src/cmd/go/go_test.go:426:23: func grepCountStdout is unused
-/usr/lib/go/src/cmd/go/go_test.go:432:23: func grepCountStderr is unused
-/usr/lib/go/src/cmd/go/main.go:406:5: var logf is unused
-/usr/lib/go/src/cmd/go/main.go:431:6: func runOut is unused
-/usr/lib/go/src/cmd/go/pkg.go:91:2: field forceBuild is unused
-/usr/lib/go/src/cmd/go/pkg.go:688:2: const toRoot is unused
-/usr/lib/go/src/cmd/go/testflag.go:278:6: func setIntFlag is unused
-unused cmd/go  3.33s user 0.25s system 447% cpu 0.799 total
-```
-
-```
-$ time unused $(go list github.com/prometheus/prometheus/... | grep -v /vendor/)
-/home/dominikh/prj/src/github.com/prometheus/prometheus/promql/engine_test.go:11:5: var noop is unused
-/home/dominikh/prj/src/github.com/prometheus/prometheus/retrieval/discovery/dns.go:39:2: const interval is unused
-/home/dominikh/prj/src/github.com/prometheus/prometheus/retrieval/discovery/dns.go:69:2: field m is unused
-/home/dominikh/prj/src/github.com/prometheus/prometheus/retrieval/discovery/nerve.go:31:2: const nerveNodePrefix is unused
-/home/dominikh/prj/src/github.com/prometheus/prometheus/retrieval/discovery/serverset.go:33:2: const serversetNodePrefix is unused
-/home/dominikh/prj/src/github.com/prometheus/prometheus/retrieval/scrape.go:41:2: const ingestedSamplesCap is unused
-/home/dominikh/prj/src/github.com/prometheus/prometheus/retrieval/scrape.go:49:2: var errSkippedScrape is unused
-/home/dominikh/prj/src/github.com/prometheus/prometheus/retrieval/targetmanager.go:184:2: field providers is unused
-/home/dominikh/prj/src/github.com/prometheus/prometheus/storage/local/delta.go:394:2: field error is unused
-/home/dominikh/prj/src/github.com/prometheus/prometheus/storage/local/delta.go:398:3: field error is unused
-/home/dominikh/prj/src/github.com/prometheus/prometheus/storage/local/doubledelta.go:500:2: field error is unused
-/home/dominikh/prj/src/github.com/prometheus/prometheus/storage/local/doubledelta.go:504:3: field error is unused
-/home/dominikh/prj/src/github.com/prometheus/prometheus/storage/remote/opentsdb/client.go:40:2: var illegalCharsRE is unused
-/home/dominikh/prj/src/github.com/prometheus/prometheus/util/stats/timer.go:56:2: field child is unused
-/home/dominikh/prj/src/github.com/prometheus/prometheus/util/treecache/treecache.go:25:2: field zkEvents is unused
-unused $(go list github.com/prometheus/prometheus/... | grep -v /vendor/)  5.70s user 0.43s system 535% cpu 1.142 total
-```
-
-```
-$ time unused -exported github.com/kr/pretty/...
-/home/dominikh/prj/src/github.com/kr/pretty/formatter.go:14:2: const limit is unused
-/home/dominikh/prj/src/github.com/kr/pretty/formatter.go:322:6: func tryDeepEqual is unused
-/home/dominikh/prj/src/github.com/kr/pretty/pretty.go:20:6: func Errorf is unused
-/home/dominikh/prj/src/github.com/kr/pretty/pretty.go:28:6: func Fprintf is unused
-/home/dominikh/prj/src/github.com/kr/pretty/pretty.go:37:6: func Log is unused
-/home/dominikh/prj/src/github.com/kr/pretty/pretty.go:45:6: func Logf is unused
-/home/dominikh/prj/src/github.com/kr/pretty/pretty.go:54:6: func Logln is unused
-/home/dominikh/prj/src/github.com/kr/pretty/pretty.go:63:6: func Print is unused
-/home/dominikh/prj/src/github.com/kr/pretty/pretty.go:71:6: func Printf is unused
-/home/dominikh/prj/src/github.com/kr/pretty/pretty.go:80:6: func Println is unused
-/home/dominikh/prj/src/github.com/kr/pretty/pretty.go:88:6: func Sprintf is unused
-/home/dominikh/prj/src/github.com/kr/pretty/pretty.go:92:6: func wrap is unused
-unused -exported github.com/kr/pretty/...  1.23s user 0.19s system 253% cpu 0.558 total
-```

vendor/honnef.co/go/tools/cmd/unused/main.go

@@ -1,78 +0,0 @@
-// unused reports unused identifiers (types, functions, ...) in your
-// code.
-package main // import "honnef.co/go/tools/cmd/unused"
-
-import (
-	"log"
-	"os"
-
-	"honnef.co/go/tools/lint/lintutil"
-	"honnef.co/go/tools/unused"
-)
-
-var (
-	fConstants    bool
-	fFields       bool
-	fFunctions    bool
-	fTypes        bool
-	fVariables    bool
-	fDebug        string
-	fWholeProgram bool
-	fReflection   bool
-)
-
-func newChecker(mode unused.CheckMode) *unused.Checker {
-	checker := unused.NewChecker(mode)
-
-	if fDebug != "" {
-		debug, err := os.Create(fDebug)
-		if err != nil {
-			log.Fatal("couldn't open debug file:", err)
-		}
-		checker.Debug = debug
-	}
-
-	checker.WholeProgram = fWholeProgram
-	checker.ConsiderReflection = fReflection
-	return checker
-}
-
-func main() {
-	log.SetFlags(0)
-
-	fs := lintutil.FlagSet("unused")
-	fs.BoolVar(&fConstants, "consts", true, "Report unused constants")
-	fs.BoolVar(&fFields, "fields", true, "Report unused fields")
-	fs.BoolVar(&fFunctions, "funcs", true, "Report unused functions and methods")
-	fs.BoolVar(&fTypes, "types", true, "Report unused types")
-	fs.BoolVar(&fVariables, "vars", true, "Report unused variables")
-	fs.StringVar(&fDebug, "debug", "", "Write a debug graph to `file`. Existing files will be overwritten.")
-	fs.BoolVar(&fWholeProgram, "exported", false, "Treat arguments as a program and report unused exported identifiers")
-	fs.BoolVar(&fReflection, "reflect", true, "Consider identifiers as used when it's likely they'll be accessed via reflection")
-	fs.Parse(os.Args[1:])
-
-	var mode unused.CheckMode
-	if fConstants {
-		mode |= unused.CheckConstants
-	}
-	if fFields {
-		mode |= unused.CheckFields
-	}
-	if fFunctions {
-		mode |= unused.CheckFunctions
-	}
-	if fTypes {
-		mode |= unused.CheckTypes
-	}
-	if fVariables {
-		mode |= unused.CheckVariables
-	}
-
-	checker := newChecker(mode)
-	l := unused.NewLintChecker(checker)
-	cfg := lintutil.CheckerConfig{
-		Checker:     l,
-		ExitNonZero: true,
-	}
-	lintutil.ProcessFlagSet([]lintutil.CheckerConfig{cfg}, fs)
-}

vendor/honnef.co/go/tools/config/config.go

@@ -0,0 +1,162 @@
+package config
+
+import (
+	"os"
+	"path/filepath"
+
+	"github.com/BurntSushi/toml"
+)
+
+func mergeLists(a, b []string) []string {
+	out := make([]string, 0, len(a)+len(b))
+	for _, el := range b {
+		if el == "inherit" {
+			out = append(out, a...)
+		} else {
+			out = append(out, el)
+		}
+	}
+
+	return out
+}
+
+func normalizeList(list []string) []string {
+	if len(list) > 1 {
+		nlist := make([]string, 0, len(list))
+		nlist = append(nlist, list[0])
+		for i, el := range list[1:] {
+			if el != list[i] {
+				nlist = append(nlist, el)
+			}
+		}
+		list = nlist
+	}
+
+	for _, el := range list {
+		if el == "inherit" {
+			// This should never happen, because the default config
+			// should not use "inherit"
+			panic(`unresolved "inherit"`)
+		}
+	}
+
+	return list
+}
+
+func (cfg Config) Merge(ocfg Config) Config {
+	if ocfg.Checks != nil {
+		cfg.Checks = mergeLists(cfg.Checks, ocfg.Checks)
+	}
+	if ocfg.Initialisms != nil {
+		cfg.Initialisms = mergeLists(cfg.Initialisms, ocfg.Initialisms)
+	}
+	if ocfg.DotImportWhitelist != nil {
+		cfg.DotImportWhitelist = mergeLists(cfg.DotImportWhitelist, ocfg.DotImportWhitelist)
+	}
+	if ocfg.HTTPStatusCodeWhitelist != nil {
+		cfg.HTTPStatusCodeWhitelist = mergeLists(cfg.HTTPStatusCodeWhitelist, ocfg.HTTPStatusCodeWhitelist)
+	}
+	return cfg
+}
+
+type Config struct {
+	// TODO(dh): this implementation makes it impossible for external
+	// clients to add their own checkers with configuration. At the
+	// moment, we don't really care about that; we don't encourage
+	// that people use this package. In the future, we may. The
+	// obvious solution would be using map[string]interface{}, but
+	// that's obviously subpar.
+
+	Checks                  []string `toml:"checks"`
+	Initialisms             []string `toml:"initialisms"`
+	DotImportWhitelist      []string `toml:"dot_import_whitelist"`
+	HTTPStatusCodeWhitelist []string `toml:"http_status_code_whitelist"`
+}
+
+var defaultConfig = Config{
+	Checks: []string{"all", "-ST1000", "-ST1003", "-ST1016"},
+	Initialisms: []string{
+		"ACL", "API", "ASCII", "CPU", "CSS", "DNS",
+		"EOF", "GUID", "HTML", "HTTP", "HTTPS", "ID",
+		"IP", "JSON", "QPS", "RAM", "RPC", "SLA",
+		"SMTP", "SQL", "SSH", "TCP", "TLS", "TTL",
+		"UDP", "UI", "GID", "UID", "UUID", "URI",
+		"URL", "UTF8", "VM", "XML", "XMPP", "XSRF",
+		"XSS",
+	},
+	DotImportWhitelist:      []string{},
+	HTTPStatusCodeWhitelist: []string{"200", "400", "404", "500"},
+}
+
+const configName = "staticcheck.conf"
+
+func parseConfigs(dir string) ([]Config, error) {
+	var out []Config
+
+	// TODO(dh): consider stopping at the GOPATH/module boundary
+	for dir != "" {
+		f, err := os.Open(filepath.Join(dir, configName))
+		if os.IsNotExist(err) {
+			ndir := filepath.Dir(dir)
+			if ndir == dir {
+				break
+			}
+			dir = ndir
+			continue
+		}
+		if err != nil {
+			return nil, err
+		}
+		var cfg Config
+		_, err = toml.DecodeReader(f, &cfg)
+		f.Close()
+		if err != nil {
+			return nil, err
+		}
+		out = append(out, cfg)
+		ndir := filepath.Dir(dir)
+		if ndir == dir {
+			break
+		}
+		dir = ndir
+	}
+	out = append(out, defaultConfig)
+	if len(out) < 2 {
+		return out, nil
+	}
+	for i := 0; i < len(out)/2; i++ {
+		out[i], out[len(out)-1-i] = out[len(out)-1-i], out[i]
+	}
+	return out, nil
+}
+
+func mergeConfigs(confs []Config) Config {
+	if len(confs) == 0 {
+		// This shouldn't happen because we always have at least a
+		// default config.
+		panic("trying to merge zero configs")
+	}
+	if len(confs) == 1 {
+		return confs[0]
+	}
+	conf := confs[0]
+	for _, oconf := range confs[1:] {
+		conf = conf.Merge(oconf)
+	}
+	return conf
+}
+
+func Load(dir string) (Config, error) {
+	confs, err := parseConfigs(dir)
+	if err != nil {
+		return Config{}, err
+	}
+	conf := mergeConfigs(confs)
+
+	conf.Checks = normalizeList(conf.Checks)
+	conf.Initialisms = normalizeList(conf.Initialisms)
+	conf.DotImportWhitelist = normalizeList(conf.DotImportWhitelist)
+	conf.HTTPStatusCodeWhitelist = normalizeList(conf.HTTPStatusCodeWhitelist)
+
+	return conf, nil
+}

vendor/honnef.co/go/tools/config/example.conf

@@ -0,0 +1,10 @@
+checks = ["all", "-ST1003", "-ST1014"]
+initialisms = ["ACL", "API", "ASCII", "CPU", "CSS", "DNS",
+	"EOF", "GUID", "HTML", "HTTP", "HTTPS", "ID",
+	"IP", "JSON", "QPS", "RAM", "RPC", "SLA",
+	"SMTP", "SQL", "SSH", "TCP", "TLS", "TTL",
+	"UDP", "UI", "GID", "UID", "UUID", "URI",
+	"URL", "UTF8", "VM", "XML", "XMPP", "XSRF",
+	"XSS"]
+dot_import_whitelist = []
+http_status_code_whitelist = ["200", "400", "404", "500"]

vendor/honnef.co/go/tools/lint/generated.go

@@ -0,0 +1,38 @@
+package lint
+
+import (
+	"bufio"
+	"bytes"
+	"io"
+)
+
+var (
+	// used by cgo before Go 1.11
+	oldCgo = []byte("// Created by cgo - DO NOT EDIT")
+	prefix = []byte("// Code generated ")
+	suffix = []byte(" DO NOT EDIT.")
+	nl     = []byte("\n")
+	crnl   = []byte("\r\n")
+)
+
+func isGenerated(r io.Reader) bool {
+	br := bufio.NewReader(r)
+	for {
+		s, err := br.ReadBytes('\n')
+		if err != nil && err != io.EOF {
+			return false
+		}
+		s = bytes.TrimSuffix(s, crnl)
+		s = bytes.TrimSuffix(s, nl)
+		if bytes.HasPrefix(s, prefix) && bytes.HasSuffix(s, suffix) {
+			return true
+		}
+		if bytes.Equal(s, oldCgo) {
+			return true
+		}
+		if err == io.EOF {
+			break
+		}
+	}
+	return false
+}

vendor/honnef.co/go/tools/lint/lint.go

@@ -1,25 +1,22 @@
-// Copyright (c) 2013 The Go Authors. All rights reserved.
+// Package lint provides the foundation for tools like staticcheck
-//
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file or at
-// https://developers.google.com/open-source/licenses/bsd.
-
-// Package lint provides the foundation for tools like gosimple.
 package lint // import "honnef.co/go/tools/lint"
 
 import (
 	"fmt"
 	"go/ast"
-	"go/build"
 	"go/token"
 	"go/types"
+	"io"
+	"os"
 	"path/filepath"
 	"sort"
 	"strings"
 	"sync"
+	"time"
 	"unicode"
 
-	"golang.org/x/tools/go/loader"
+	"golang.org/x/tools/go/packages"
+	"honnef.co/go/tools/config"
 	"honnef.co/go/tools/ssa"
 	"honnef.co/go/tools/ssa/ssautil"
 )
@@ -28,8 +25,10 @@ type Job struct {
 	Program *Program
 
 	checker  string
-	check    string
+	check    Check
 	problems []Problem
+
+	duration time.Duration
 }
 
 type Ignore interface {
@@ -89,7 +88,7 @@ type GlobIgnore struct {
 
 func (gi *GlobIgnore) Match(p Problem) bool {
 	if gi.Pattern != "*" {
-		pkgpath := p.Package.Path()
+		pkgpath := p.Package.Types.Path()
 		if strings.HasSuffix(pkgpath, "_test") {
 			pkgpath = pkgpath[:len(pkgpath)-len("_test")]
 		}
@@ -108,30 +107,43 @@ func (gi *GlobIgnore) Match(p Problem) bool {
 
 type Program struct {
 	SSA              *ssa.Program
-	Prog *loader.Program
+	InitialPackages  []*Pkg
-	// TODO(dh): Rename to InitialPackages?
-	Packages         []*Pkg
 	InitialFunctions []*ssa.Function
+	AllPackages      []*packages.Package
 	AllFunctions     []*ssa.Function
 	Files            []*ast.File
-	Info             *types.Info
 	GoVersion        int
 
 	tokenFileMap map[*token.File]*ast.File
 	astFileMap   map[*ast.File]*Pkg
+	packagesMap  map[string]*packages.Package
+
+	genMu        sync.RWMutex
+	generatedMap map[string]bool
+}
+
+func (prog *Program) Fset() *token.FileSet {
+	return prog.InitialPackages[0].Fset
 }
 
 type Func func(*Job)
 
+type Severity uint8
+
+const (
+	Error Severity = iota
+	Warning
+	Ignored
+)
+
 // Problem represents a problem in some source code.
 type Problem struct {
-	pos      token.Pos
 	Position token.Position // position in source file
 	Text     string         // the prose that describes the problem
 	Check    string
 	Checker  string
-	Package  *types.Package
+	Package  *Pkg
-	Ignored  bool
+	Severity Severity
 }
 
 func (p *Problem) String() string {
@@ -145,15 +157,25 @@ type Checker interface {
 	Name() string
 	Prefix() string
 	Init(*Program)
-	Funcs() map[string]Func
+	Checks() []Check
+}
+
+type Check struct {
+	Fn              Func
+	ID              string
+	FilterGenerated bool
 }
 
 // A Linter lints Go source code.
 type Linter struct {
-	Checker       Checker
+	Checkers      []Checker
 	Ignores       []Ignore
 	GoVersion     int
 	ReturnIgnored bool
+	Config        config.Config
+
+	MaxConcurrentJobs int
+	PrintStats        bool
 
 	automaticIgnores []Ignore
 }
@@ -191,36 +213,6 @@ func (j *Job) File(node Positioner) *ast.File {
 	return j.Program.File(node)
 }
 
-// TODO(dh): switch to sort.Slice when Go 1.9 lands.
-type byPosition struct {
-	fset *token.FileSet
-	ps   []Problem
-}
-
-func (ps byPosition) Len() int {
-	return len(ps.ps)
-}
-
-func (ps byPosition) Less(i int, j int) bool {
-	pi, pj := ps.ps[i].Position, ps.ps[j].Position
-
-	if pi.Filename != pj.Filename {
-		return pi.Filename < pj.Filename
-	}
-	if pi.Line != pj.Line {
-		return pi.Line < pj.Line
-	}
-	if pi.Column != pj.Column {
-		return pi.Column < pj.Column
-	}
-
-	return ps.ps[i].Text < ps.ps[j].Text
-}
-
-func (ps byPosition) Swap(i int, j int) {
-	ps.ps[i], ps.ps[j] = ps.ps[j], ps.ps[i]
-}
-
 func parseDirective(s string) (cmd string, args []string) {
 	if !strings.HasPrefix(s, "//lint:") {
 		return "", nil
@@ -230,79 +222,131 @@ func parseDirective(s string) (cmd string, args []string) {
 	return fields[0], fields[1:]
 }
 
-func (l *Linter) Lint(lprog *loader.Program, conf *loader.Config) []Problem {
+type PerfStats struct {
-	ssaprog := ssautil.CreateProgram(lprog, ssa.GlobalDebug)
+	PackageLoading time.Duration
+	SSABuild       time.Duration
+	OtherInitWork  time.Duration
+	CheckerInits   map[string]time.Duration
+	Jobs           []JobStat
+}
+
+type JobStat struct {
+	Job      string
+	Duration time.Duration
+}
+
+func (stats *PerfStats) Print(w io.Writer) {
+	fmt.Fprintln(w, "Package loading:", stats.PackageLoading)
+	fmt.Fprintln(w, "SSA build:", stats.SSABuild)
+	fmt.Fprintln(w, "Other init work:", stats.OtherInitWork)
+
+	fmt.Fprintln(w, "Checker inits:")
+	for checker, d := range stats.CheckerInits {
+		fmt.Fprintf(w, "\t%s: %s\n", checker, d)
+	}
+	fmt.Fprintln(w)
+
+	fmt.Fprintln(w, "Jobs:")
+	sort.Slice(stats.Jobs, func(i, j int) bool {
+		return stats.Jobs[i].Duration < stats.Jobs[j].Duration
+	})
+	var total time.Duration
+	for _, job := range stats.Jobs {
+		fmt.Fprintf(w, "\t%s: %s\n", job.Job, job.Duration)
+		total += job.Duration
+	}
+	fmt.Fprintf(w, "\tTotal: %s\n", total)
+}
+
+func (l *Linter) Lint(initial []*packages.Package, stats *PerfStats) []Problem {
+	allPkgs := allPackages(initial)
+	t := time.Now()
+	ssaprog, _ := ssautil.Packages(allPkgs, ssa.GlobalDebug)
 	ssaprog.Build()
+	if stats != nil {
+		stats.SSABuild = time.Since(t)
+	}
+
+	t = time.Now()
 	pkgMap := map[*ssa.Package]*Pkg{}
 	var pkgs []*Pkg
-	for _, pkginfo := range lprog.InitialPackages() {
+	for _, pkg := range initial {
-		ssapkg := ssaprog.Package(pkginfo.Pkg)
+		ssapkg := ssaprog.Package(pkg.Types)
-		var bp *build.Package
+		var cfg config.Config
-		if len(pkginfo.Files) != 0 {
+		if len(pkg.GoFiles) != 0 {
-			path := lprog.Fset.Position(pkginfo.Files[0].Pos()).Filename
+			path := pkg.GoFiles[0]
 			dir := filepath.Dir(path)
 			var err error
-			ctx := conf.Build
+			// OPT(dh): we're rebuilding the entire config tree for
-			if ctx == nil {
+			// each package. for example, if we check a/b/c and
-				ctx = &build.Default
+			// a/b/c/d, we'll process a, a/b, a/b/c, a, a/b, a/b/c,
-			}
+			// a/b/c/d – we should cache configs per package and only
-			bp, err = ctx.ImportDir(dir, 0)
+			// load the new levels.
+			cfg, err = config.Load(dir)
 			if err != nil {
-				// shouldn't happen
+				// FIXME(dh): we couldn't load the config, what are we
+				// supposed to do? probably tell the user somehow
 			}
+			cfg = cfg.Merge(l.Config)
 		}
+
 		pkg := &Pkg{
-			Package:  ssapkg,
+			SSA:     ssapkg,
-			Info:     pkginfo,
+			Package: pkg,
-			BuildPkg: bp,
+			Config:  cfg,
 		}
 		pkgMap[ssapkg] = pkg
 		pkgs = append(pkgs, pkg)
 	}
+
 	prog := &Program{
 		SSA:             ssaprog,
-		Prog:         lprog,
+		InitialPackages: pkgs,
-		Packages:     pkgs,
+		AllPackages:     allPkgs,
-		Info:         &types.Info{},
 		GoVersion:       l.GoVersion,
 		tokenFileMap:    map[*token.File]*ast.File{},
 		astFileMap:      map[*ast.File]*Pkg{},
+		generatedMap:    map[string]bool{},
+	}
+	prog.packagesMap = map[string]*packages.Package{}
+	for _, pkg := range allPkgs {
+		prog.packagesMap[pkg.Types.Path()] = pkg
 	}
 
-	initial := map[*types.Package]struct{}{}
+	isInitial := map[*types.Package]struct{}{}
 	for _, pkg := range pkgs {
-		initial[pkg.Info.Pkg] = struct{}{}
+		isInitial[pkg.Types] = struct{}{}
 	}
 	for fn := range ssautil.AllFunctions(ssaprog) {
 		if fn.Pkg == nil {
 			continue
 		}
 		prog.AllFunctions = append(prog.AllFunctions, fn)
-		if _, ok := initial[fn.Pkg.Pkg]; ok {
+		if _, ok := isInitial[fn.Pkg.Pkg]; ok {
 			prog.InitialFunctions = append(prog.InitialFunctions, fn)
 		}
 	}
 	for _, pkg := range pkgs {
-		prog.Files = append(prog.Files, pkg.Info.Files...)
+		prog.Files = append(prog.Files, pkg.Syntax...)
 
-		ssapkg := ssaprog.Package(pkg.Info.Pkg)
+		ssapkg := ssaprog.Package(pkg.Types)
-		for _, f := range pkg.Info.Files {
+		for _, f := range pkg.Syntax {
 			prog.astFileMap[f] = pkgMap[ssapkg]
 		}
 	}
 
-	for _, pkginfo := range lprog.AllPackages {
+	for _, pkg := range allPkgs {
-		for _, f := range pkginfo.Files {
+		for _, f := range pkg.Syntax {
-			tf := lprog.Fset.File(f.Pos())
+			tf := pkg.Fset.File(f.Pos())
 			prog.tokenFileMap[tf] = f
 		}
 	}
 
 	var out []Problem
 	l.automaticIgnores = nil
-	for _, pkginfo := range lprog.InitialPackages() {
+	for _, pkg := range initial {
-		for _, f := range pkginfo.Files {
+		for _, f := range pkg.Syntax {
-			cm := ast.NewCommentMap(lprog.Fset, f, f.Comments)
+			cm := ast.NewCommentMap(pkg.Fset, f, f.Comments)
 			for node, cgs := range cm {
 				for _, cg := range cgs {
 					for _, c := range cg.List {
@@ -315,11 +359,10 @@ func (l *Linter) Lint(lprog *loader.Program, conf *loader.Config) []Problem {
 							if len(args) < 2 {
 								// FIXME(dh): this causes duplicated warnings when using megacheck
 								p := Problem{
-									pos:      c.Pos(),
 									Position: prog.DisplayPosition(c.Pos()),
 									Text:     "malformed linter directive; missing the required reason field?",
 									Check:    "",
-									Checker:  l.Checker.Name(),
+									Checker:  "lint",
 									Package:  nil,
 								}
 								out = append(out, p)
@@ -362,75 +405,84 @@ func (l *Linter) Lint(lprog *loader.Program, conf *loader.Config) []Problem {
 		scopes     int
 	}{}
 	for _, pkg := range pkgs {
-		sizes.types += len(pkg.Info.Info.Types)
+		sizes.types += len(pkg.TypesInfo.Types)
-		sizes.defs += len(pkg.Info.Info.Defs)
+		sizes.defs += len(pkg.TypesInfo.Defs)
-		sizes.uses += len(pkg.Info.Info.Uses)
+		sizes.uses += len(pkg.TypesInfo.Uses)
-		sizes.implicits += len(pkg.Info.Info.Implicits)
+		sizes.implicits += len(pkg.TypesInfo.Implicits)
-		sizes.selections += len(pkg.Info.Info.Selections)
+		sizes.selections += len(pkg.TypesInfo.Selections)
-		sizes.scopes += len(pkg.Info.Info.Scopes)
+		sizes.scopes += len(pkg.TypesInfo.Scopes)
 	}
-	prog.Info.Types = make(map[ast.Expr]types.TypeAndValue, sizes.types)
-	prog.Info.Defs = make(map[*ast.Ident]types.Object, sizes.defs)
-	prog.Info.Uses = make(map[*ast.Ident]types.Object, sizes.uses)
-	prog.Info.Implicits = make(map[ast.Node]types.Object, sizes.implicits)
-	prog.Info.Selections = make(map[*ast.SelectorExpr]*types.Selection, sizes.selections)
-	prog.Info.Scopes = make(map[ast.Node]*types.Scope, sizes.scopes)
-	for _, pkg := range pkgs {
-		for k, v := range pkg.Info.Info.Types {
-			prog.Info.Types[k] = v
-		}
-		for k, v := range pkg.Info.Info.Defs {
-			prog.Info.Defs[k] = v
-		}
-		for k, v := range pkg.Info.Info.Uses {
-			prog.Info.Uses[k] = v
-		}
-		for k, v := range pkg.Info.Info.Implicits {
-			prog.Info.Implicits[k] = v
-		}
-		for k, v := range pkg.Info.Info.Selections {
-			prog.Info.Selections[k] = v
-		}
-		for k, v := range pkg.Info.Info.Scopes {
-			prog.Info.Scopes[k] = v
-		}
-	}
-	l.Checker.Init(prog)
 
-	funcs := l.Checker.Funcs()
+	if stats != nil {
-	var keys []string
+		stats.OtherInitWork = time.Since(t)
-	for k := range funcs {
+	}
-		keys = append(keys, k)
+
+	for _, checker := range l.Checkers {
+		t := time.Now()
+		checker.Init(prog)
+		if stats != nil {
+			stats.CheckerInits[checker.Name()] = time.Since(t)
+		}
 	}
-	sort.Strings(keys)
 
 	var jobs []*Job
-	for _, k := range keys {
+	var allChecks []string
+
+	for _, checker := range l.Checkers {
+		checks := checker.Checks()
+		for _, check := range checks {
+			allChecks = append(allChecks, check.ID)
 			j := &Job{
 				Program: prog,
-			checker: l.Checker.Name(),
+				checker: checker.Name(),
-			check:   k,
+				check:   check,
 			}
 			jobs = append(jobs, j)
 		}
+	}
+
+	max := len(jobs)
+	if l.MaxConcurrentJobs > 0 {
+		max = l.MaxConcurrentJobs
+	}
+
+	sem := make(chan struct{}, max)
 	wg := &sync.WaitGroup{}
 	for _, j := range jobs {
 		wg.Add(1)
 		go func(j *Job) {
 			defer wg.Done()
-			fn := funcs[j.check]
+			sem <- struct{}{}
+			defer func() { <-sem }()
+			fn := j.check.Fn
 			if fn == nil {
 				return
 			}
+			t := time.Now()
 			fn(j)
+			j.duration = time.Since(t)
 		}(j)
 	}
 	wg.Wait()
 
 	for _, j := range jobs {
+		if stats != nil {
+			stats.Jobs = append(stats.Jobs, JobStat{j.check.ID, j.duration})
+		}
 		for _, p := range j.problems {
-			p.Ignored = l.ignore(p)
+			allowedChecks := FilterChecks(allChecks, p.Package.Config.Checks)
-			if l.ReturnIgnored || !p.Ignored {
+
+			if l.ignore(p) {
+				p.Severity = Ignored
+			}
+			// TODO(dh): support globs in check white/blacklist
+			// OPT(dh): this approach doesn't actually disable checks,
+			// it just discards their results. For the moment, that's
+			// fine. None of our checks are super expensive. In the
+			// future, we may want to provide opt-in expensive
+			// analysis, which shouldn't run at all. It may be easiest
+			// to implement this in the individual checks.
+			if (l.ReturnIgnored || p.Severity != Ignored) && allowedChecks[p.Check] {
 				out = append(out, p)
 			}
 		}
@@ -444,39 +496,128 @@ func (l *Linter) Lint(lprog *loader.Program, conf *loader.Config) []Problem {
 		if ig.matched {
 			continue
 		}
-		for _, c := range ig.Checks {
+
-			idx := strings.IndexFunc(c, func(r rune) bool {
+		couldveMatched := false
-				return unicode.IsNumber(r)
+		for f, pkg := range prog.astFileMap {
-			})
+			if prog.Fset().Position(f.Pos()).Filename != ig.File {
-			if idx == -1 {
-				// malformed check name, backing out
 				continue
 			}
-			if c[:idx] != l.Checker.Prefix() {
+			allowedChecks := FilterChecks(allChecks, pkg.Config.Checks)
-				// not for this checker
+			for _, c := range ig.Checks {
+				if !allowedChecks[c] {
+					continue
+				}
+				couldveMatched = true
+				break
+			}
+			break
+		}
+
+		if !couldveMatched {
+			// The ignored checks were disabled for the containing package.
+			// Don't flag the ignore for not having matched.
 			continue
 		}
 		p := Problem{
-				pos:      ig.pos,
 			Position: prog.DisplayPosition(ig.pos),
 			Text:     "this linter directive didn't match anything; should it be removed?",
 			Check:    "",
-				Checker:  l.Checker.Name(),
+			Checker:  "lint",
 			Package:  nil,
 		}
 		out = append(out, p)
 	}
+
+	sort.Slice(out, func(i int, j int) bool {
+		pi, pj := out[i].Position, out[j].Position
+
+		if pi.Filename != pj.Filename {
+			return pi.Filename < pj.Filename
+		}
+		if pi.Line != pj.Line {
+			return pi.Line < pj.Line
+		}
+		if pi.Column != pj.Column {
+			return pi.Column < pj.Column
 		}
 
-	sort.Sort(byPosition{lprog.Fset, out})
+		return out[i].Text < out[j].Text
+	})
+
+	if l.PrintStats && stats != nil {
+		stats.Print(os.Stderr)
+	}
+
+	if len(out) < 2 {
 		return out
 	}
 
+	uniq := make([]Problem, 0, len(out))
+	uniq = append(uniq, out[0])
+	prev := out[0]
+	for _, p := range out[1:] {
+		if prev.Position == p.Position && prev.Text == p.Text {
+			continue
+		}
+		prev = p
+		uniq = append(uniq, p)
+	}
+
+	return uniq
+}
+
+func FilterChecks(allChecks []string, checks []string) map[string]bool {
+	// OPT(dh): this entire computation could be cached per package
+	allowedChecks := map[string]bool{}
+
+	for _, check := range checks {
+		b := true
+		if len(check) > 1 && check[0] == '-' {
+			b = false
+			check = check[1:]
+		}
+		if check == "*" || check == "all" {
+			// Match all
+			for _, c := range allChecks {
+				allowedChecks[c] = b
+			}
+		} else if strings.HasSuffix(check, "*") {
+			// Glob
+			prefix := check[:len(check)-1]
+			isCat := strings.IndexFunc(prefix, func(r rune) bool { return unicode.IsNumber(r) }) == -1
+
+			for _, c := range allChecks {
+				idx := strings.IndexFunc(c, func(r rune) bool { return unicode.IsNumber(r) })
+				if isCat {
+					// Glob is S*, which should match S1000 but not SA1000
+					cat := c[:idx]
+					if prefix == cat {
+						allowedChecks[c] = b
+					}
+				} else {
+					// Glob is S1*
+					if strings.HasPrefix(c, prefix) {
+						allowedChecks[c] = b
+					}
+				}
+			}
+		} else {
+			// Literal check name
+			allowedChecks[check] = b
+		}
+	}
+	return allowedChecks
+}
+
+func (prog *Program) Package(path string) *packages.Package {
+	return prog.packagesMap[path]
+}
+
 // Pkg represents a package being linted.
 type Pkg struct {
-	*ssa.Package
+	SSA *ssa.Package
-	Info     *loader.PackageInfo
+	*packages.Package
-	BuildPkg *build.Package
+	Config config.Config
 }
 
 type Positioner interface {
@@ -484,52 +625,61 @@ type Positioner interface {
 }
 
 func (prog *Program) DisplayPosition(p token.Pos) token.Position {
-	// The //line compiler directive can be used to change the file
+	// Only use the adjusted position if it points to another Go file.
-	// name and line numbers associated with code. This can, for
+	// This means we'll point to the original file for cgo files, but
-	// example, be used by code generation tools. The most prominent
+	// we won't point to a YACC grammar file.
-	// example is 'go tool cgo', which uses //line directives to refer
-	// back to the original source code.
-	//
-	// In the context of our linters, we need to treat these
-	// directives differently depending on context. For cgo files, we
-	// want to honour the directives, so that line numbers are
-	// adjusted correctly. For all other files, we want to ignore the
-	// directives, so that problems are reported at their actual
-	// position and not, for example, a yacc grammar file. This also
-	// affects the ignore mechanism, since it operates on the position
-	// information stored within problems. With this implementation, a
-	// user will ignore foo.go, not foo.y
 
-	pkg := prog.astFileMap[prog.tokenFileMap[prog.Prog.Fset.File(p)]]
+	pos := prog.Fset().PositionFor(p, false)
-	bp := pkg.BuildPkg
+	adjPos := prog.Fset().PositionFor(p, true)
-	adjPos := prog.Prog.Fset.Position(p)
+
-	if bp == nil {
+	if filepath.Ext(adjPos.Filename) == ".go" {
-		// couldn't find the package for some reason (deleted? faulty
-		// file system?)
 		return adjPos
 	}
-	base := filepath.Base(adjPos.Filename)
+	return pos
-	for _, f := range bp.CgoFiles {
-		if f == base {
-			// this is a cgo file, use the adjusted position
-			return adjPos
 }
+
+func (prog *Program) isGenerated(path string) bool {
+	// This function isn't very efficient in terms of lock contention
+	// and lack of parallelism, but it really shouldn't matter.
+	// Projects consists of thousands of files, and have hundreds of
+	// errors. That's not a lot of calls to isGenerated.
+
+	prog.genMu.RLock()
+	if b, ok := prog.generatedMap[path]; ok {
+		prog.genMu.RUnlock()
+		return b
 	}
-	// not a cgo file, ignore //line directives
+	prog.genMu.RUnlock()
-	return prog.Prog.Fset.PositionFor(p, false)
+	prog.genMu.Lock()
+	defer prog.genMu.Unlock()
+	// recheck to avoid doing extra work in case of race
+	if b, ok := prog.generatedMap[path]; ok {
+		return b
+	}
+
+	f, err := os.Open(path)
+	if err != nil {
+		return false
+	}
+	defer f.Close()
+	b := isGenerated(f)
+	prog.generatedMap[path] = b
+	return b
 }
 
 func (j *Job) Errorf(n Positioner, format string, args ...interface{}) *Problem {
 	tf := j.Program.SSA.Fset.File(n.Pos())
 	f := j.Program.tokenFileMap[tf]
-	pkg := j.Program.astFileMap[f].Pkg
+	pkg := j.Program.astFileMap[f]
 
 	pos := j.Program.DisplayPosition(n.Pos())
+	if j.Program.isGenerated(pos.Filename) && j.check.FilterGenerated {
+		return nil
+	}
 	problem := Problem{
-		pos:      n.Pos(),
 		Position: pos,
 		Text:     fmt.Sprintf(format, args...),
-		Check:    j.check,
+		Check:    j.check.ID,
 		Checker:  j.checker,
 		Package:  pkg,
 	}
@@ -541,3 +691,16 @@ func (j *Job) NodePackage(node Positioner) *Pkg {
 	f := j.File(node)
 	return j.Program.astFileMap[f]
 }
+
+func allPackages(pkgs []*packages.Package) []*packages.Package {
+	var out []*packages.Package
+	packages.Visit(
+		pkgs,
+		func(pkg *packages.Package) bool {
+			out = append(out, pkg)
+			return true
+		},
+		nil,
+	)
+	return out
+}

vendor/honnef.co/go/tools/lint/lintdsl/lintdsl.go

@@ -103,10 +103,21 @@ func IsZero(expr ast.Expr) bool {
 	return IsIntLiteral(expr, "0")
 }
 
-func TypeOf(j *lint.Job, expr ast.Expr) types.Type          { return j.Program.Info.TypeOf(expr) }
+func TypeOf(j *lint.Job, expr ast.Expr) types.Type {
+	if expr == nil {
+		return nil
+	}
+	return j.NodePackage(expr).TypesInfo.TypeOf(expr)
+}
+
 func IsOfType(j *lint.Job, expr ast.Expr, name string) bool { return IsType(TypeOf(j, expr), name) }
 
-func ObjectOf(j *lint.Job, ident *ast.Ident) types.Object { return j.Program.Info.ObjectOf(ident) }
+func ObjectOf(j *lint.Job, ident *ast.Ident) types.Object {
+	if ident == nil {
+		return nil
+	}
+	return j.NodePackage(ident).TypesInfo.ObjectOf(ident)
+}
 
 func IsInTest(j *lint.Job, node lint.Positioner) bool {
 	// FIXME(dh): this doesn't work for global variables with
@@ -123,14 +134,15 @@ func IsInMain(j *lint.Job, node lint.Positioner) bool {
 	if pkg == nil {
 		return false
 	}
-	return pkg.Pkg.Name() == "main"
+	return pkg.Types.Name() == "main"
 }
 
 func SelectorName(j *lint.Job, expr *ast.SelectorExpr) string {
-	sel := j.Program.Info.Selections[expr]
+	info := j.NodePackage(expr).TypesInfo
+	sel := info.Selections[expr]
 	if sel == nil {
 		if x, ok := expr.X.(*ast.Ident); ok {
-			pkg, ok := j.Program.Info.ObjectOf(x).(*types.PkgName)
+			pkg, ok := info.ObjectOf(x).(*types.PkgName)
 			if !ok {
 				// This shouldn't happen
 				return fmt.Sprintf("%s.%s", x.Name, expr.Sel.Name)
@@ -143,11 +155,11 @@ func SelectorName(j *lint.Job, expr *ast.SelectorExpr) string {
 }
 
 func IsNil(j *lint.Job, expr ast.Expr) bool {
-	return j.Program.Info.Types[expr].IsNil()
+	return j.NodePackage(expr).TypesInfo.Types[expr].IsNil()
 }
 
 func BoolConst(j *lint.Job, expr ast.Expr) bool {
-	val := j.Program.Info.ObjectOf(expr.(*ast.Ident)).(*types.Const).Val()
+	val := j.NodePackage(expr).TypesInfo.ObjectOf(expr.(*ast.Ident)).(*types.Const).Val()
 	return constant.BoolVal(val)
 }
 
@@ -160,7 +172,7 @@ func IsBoolConst(j *lint.Job, expr ast.Expr) bool {
 	if !ok {
 		return false
 	}
-	obj := j.Program.Info.ObjectOf(ident)
+	obj := j.NodePackage(expr).TypesInfo.ObjectOf(ident)
 	c, ok := obj.(*types.Const)
 	if !ok {
 		return false
@@ -176,7 +188,7 @@ func IsBoolConst(j *lint.Job, expr ast.Expr) bool {
 }
 
 func ExprToInt(j *lint.Job, expr ast.Expr) (int64, bool) {
-	tv := j.Program.Info.Types[expr]
+	tv := j.NodePackage(expr).TypesInfo.Types[expr]
 	if tv.Value == nil {
 		return 0, false
 	}
@@ -187,7 +199,7 @@ func ExprToInt(j *lint.Job, expr ast.Expr) (int64, bool) {
 }
 
 func ExprToString(j *lint.Job, expr ast.Expr) (string, bool) {
-	val := j.Program.Info.Types[expr].Value
+	val := j.NodePackage(expr).TypesInfo.Types[expr].Value
 	if val == nil {
 		return "", false
 	}
@@ -220,17 +232,35 @@ func IsGoVersion(j *lint.Job, minor int) bool {
 	return j.Program.GoVersion >= minor
 }
 
+func CallNameAST(j *lint.Job, call *ast.CallExpr) string {
+	switch fun := call.Fun.(type) {
+	case *ast.SelectorExpr:
+		fn, ok := ObjectOf(j, fun.Sel).(*types.Func)
+		if !ok {
+			return ""
+		}
+		return fn.FullName()
+	case *ast.Ident:
+		obj := ObjectOf(j, fun)
+		switch obj := obj.(type) {
+		case *types.Func:
+			return obj.FullName()
+		case *types.Builtin:
+			return obj.Name()
+		default:
+			return ""
+		}
+	default:
+		return ""
+	}
+}
+
 func IsCallToAST(j *lint.Job, node ast.Node, name string) bool {
 	call, ok := node.(*ast.CallExpr)
 	if !ok {
 		return false
 	}
-	sel, ok := call.Fun.(*ast.SelectorExpr)
+	return CallNameAST(j, call) == name
-	if !ok {
-		return false
-	}
-	fn, ok := j.Program.Info.ObjectOf(sel.Sel).(*types.Func)
-	return ok && fn.FullName() == name
 }
 
 func IsCallToAnyAST(j *lint.Job, node ast.Node, names ...string) bool {
@@ -280,3 +310,70 @@ func Inspect(node ast.Node, fn func(node ast.Node) bool) {
 	}
 	ast.Inspect(node, fn)
 }
+
+func GroupSpecs(j *lint.Job, specs []ast.Spec) [][]ast.Spec {
+	if len(specs) == 0 {
+		return nil
+	}
+	fset := j.Program.SSA.Fset
+	groups := make([][]ast.Spec, 1)
+	groups[0] = append(groups[0], specs[0])
+
+	for _, spec := range specs[1:] {
+		g := groups[len(groups)-1]
+		if fset.PositionFor(spec.Pos(), false).Line-1 !=
+			fset.PositionFor(g[len(g)-1].End(), false).Line {
+
+			groups = append(groups, nil)
+		}
+
+		groups[len(groups)-1] = append(groups[len(groups)-1], spec)
+	}
+
+	return groups
+}
+
+func IsObject(obj types.Object, name string) bool {
+	var path string
+	if pkg := obj.Pkg(); pkg != nil {
+		path = pkg.Path() + "."
+	}
+	return path+obj.Name() == name
+}
+
+type Field struct {
+	Var  *types.Var
+	Tag  string
+	Path []int
+}
+
+// FlattenFields recursively flattens T and embedded structs,
+// returning a list of fields. If multiple fields with the same name
+// exist, all will be returned.
+func FlattenFields(T *types.Struct) []Field {
+	return flattenFields(T, nil, nil)
+}
+
+func flattenFields(T *types.Struct, path []int, seen map[types.Type]bool) []Field {
+	if seen == nil {
+		seen = map[types.Type]bool{}
+	}
+	if seen[T] {
+		return nil
+	}
+	seen[T] = true
+	var out []Field
+	for i := 0; i < T.NumFields(); i++ {
+		field := T.Field(i)
+		tag := T.Tag(i)
+		np := append(path[:len(path):len(path)], i)
+		if field.Anonymous() {
+			if s, ok := Dereference(field.Type()).Underlying().(*types.Struct); ok {
+				out = append(out, flattenFields(s, np, seen)...)
+			}
+		} else {
+			out = append(out, Field{field, tag, np})
+		}
+	}
+	return out
+}

vendor/honnef.co/go/tools/lint/lintutil/format/format.go

@@ -0,0 +1,128 @@
+// Package format provides formatters for linter problems.
+package format
+
+import (
+	"encoding/json"
+	"fmt"
+	"go/token"
+	"io"
+	"os"
+	"path/filepath"
+	"text/tabwriter"
+
+	"honnef.co/go/tools/lint"
+)
+
+func shortPath(path string) string {
+	cwd, err := os.Getwd()
+	if err != nil {
+		return path
+	}
+	if rel, err := filepath.Rel(cwd, path); err == nil && len(rel) < len(path) {
+		return rel
+	}
+	return path
+}
+
+func relativePositionString(pos token.Position) string {
+	s := shortPath(pos.Filename)
+	if pos.IsValid() {
+		if s != "" {
+			s += ":"
+		}
+		s += fmt.Sprintf("%d:%d", pos.Line, pos.Column)
+	}
+	if s == "" {
+		s = "-"
+	}
+	return s
+}
+
+type Statter interface {
+	Stats(total, errors, warnings int)
+}
+
+type Formatter interface {
+	Format(p lint.Problem)
+}
+
+type Text struct {
+	W io.Writer
+}
+
+func (o Text) Format(p lint.Problem) {
+	fmt.Fprintf(o.W, "%v: %s\n", relativePositionString(p.Position), p.String())
+}
+
+type JSON struct {
+	W io.Writer
+}
+
+func severity(s lint.Severity) string {
+	switch s {
+	case lint.Error:
+		return "error"
+	case lint.Warning:
+		return "warning"
+	case lint.Ignored:
+		return "ignored"
+	}
+	return ""
+}
+
+func (o JSON) Format(p lint.Problem) {
+	type location struct {
+		File   string `json:"file"`
+		Line   int    `json:"line"`
+		Column int    `json:"column"`
+	}
+	jp := struct {
+		Code     string   `json:"code"`
+		Severity string   `json:"severity,omitempty"`
+		Location location `json:"location"`
+		Message  string   `json:"message"`
+	}{
+		Code:     p.Check,
+		Severity: severity(p.Severity),
+		Location: location{
+			File:   p.Position.Filename,
+			Line:   p.Position.Line,
+			Column: p.Position.Column,
+		},
+		Message: p.Text,
+	}
+	_ = json.NewEncoder(o.W).Encode(jp)
+}
+
+type Stylish struct {
+	W io.Writer
+
+	prevFile string
+	tw       *tabwriter.Writer
+}
+
+func (o *Stylish) Format(p lint.Problem) {
+	if p.Position.Filename == "" {
+		p.Position.Filename = "-"
+	}
+
+	if p.Position.Filename != o.prevFile {
+		if o.prevFile != "" {
+			o.tw.Flush()
+			fmt.Fprintln(o.W)
+		}
+		fmt.Fprintln(o.W, p.Position.Filename)
+		o.prevFile = p.Position.Filename
+		o.tw = tabwriter.NewWriter(o.W, 0, 4, 2, ' ', 0)
+	}
+	fmt.Fprintf(o.tw, "  (%d, %d)\t%s\t%s\n", p.Position.Line, p.Position.Column, p.Check, p.Text)
+}
+
+func (o *Stylish) Stats(total, errors, warnings int) {
+	if o.tw != nil {
+		o.tw.Flush()
+		fmt.Fprintln(o.W)
+	}
+	fmt.Fprintf(o.W, " ✖ %d problems (%d errors, %d warnings)\n",
+		total, errors, warnings)
+}

vendor/honnef.co/go/tools/lint/lintutil/util.go

@@ -8,70 +8,28 @@
 package lintutil // import "honnef.co/go/tools/lint/lintutil"
 
 import (
-	"encoding/json"
 	"errors"
 	"flag"
 	"fmt"
 	"go/build"
-	"go/parser"
 	"go/token"
-	"go/types"
+	"log"
-	"io"
 	"os"
-	"path/filepath"
+	"regexp"
+	"runtime"
+	"runtime/pprof"
 	"strconv"
 	"strings"
+	"time"
 
+	"honnef.co/go/tools/config"
 	"honnef.co/go/tools/lint"
+	"honnef.co/go/tools/lint/lintutil/format"
 	"honnef.co/go/tools/version"
 
-	"github.com/kisielk/gotool"
+	"golang.org/x/tools/go/packages"
-	"golang.org/x/tools/go/loader"
 )
 
-type OutputFormatter interface {
-	Format(p lint.Problem)
-}
-
-type TextOutput struct {
-	w io.Writer
-}
-
-func (o TextOutput) Format(p lint.Problem) {
-	fmt.Fprintf(o.w, "%v: %s\n", relativePositionString(p.Position), p.String())
-}
-
-type JSONOutput struct {
-	w io.Writer
-}
-
-func (o JSONOutput) Format(p lint.Problem) {
-	type location struct {
-		File   string `json:"file"`
-		Line   int    `json:"line"`
-		Column int    `json:"column"`
-	}
-	jp := struct {
-		Checker  string   `json:"checker"`
-		Code     string   `json:"code"`
-		Severity string   `json:"severity,omitempty"`
-		Location location `json:"location"`
-		Message  string   `json:"message"`
-		Ignored  bool     `json:"ignored"`
-	}{
-		p.Checker,
-		p.Check,
-		"", // TODO(dh): support severity
-		location{
-			p.Position.Filename,
-			p.Position.Line,
-			p.Position.Column,
-		},
-		p.Text,
-		p.Ignored,
-	}
-	_ = json.NewEncoder(o.w).Encode(jp)
-}
 func usage(name string, flags *flag.FlagSet) func() {
 	return func() {
 		fmt.Fprintf(os.Stderr, "Usage of %s:\n", name)
@@ -84,38 +42,6 @@ func usage(name string, flags *flag.FlagSet) func() {
 	}
 }
 
-type runner struct {
-	checker       lint.Checker
-	tags          []string
-	ignores       []lint.Ignore
-	version       int
-	returnIgnored bool
-}
-
-func resolveRelative(importPaths []string, tags []string) (goFiles bool, err error) {
-	if len(importPaths) == 0 {
-		return false, nil
-	}
-	if strings.HasSuffix(importPaths[0], ".go") {
-		// User is specifying a package in terms of .go files, don't resolve
-		return true, nil
-	}
-	wd, err := os.Getwd()
-	if err != nil {
-		return false, err
-	}
-	ctx := build.Default
-	ctx.BuildTags = tags
-	for i, path := range importPaths {
-		bpkg, err := ctx.Import(path, wd, build.FindOnly)
-		if err != nil {
-			return false, fmt.Errorf("can't load package %q: %v", path, err)
-		}
-		importPaths[i] = bpkg.ImportPath
-	}
-	return false, nil
-}
-
 func parseIgnore(s string) ([]lint.Ignore, error) {
 	var out []lint.Ignore
 	if len(s) == 0 {
@@ -158,16 +84,41 @@ func (v *versionFlag) Get() interface{} {
 	return int(*v)
 }
 
+type list []string
+
+func (list *list) String() string {
+	return `"` + strings.Join(*list, ",") + `"`
+}
+
+func (list *list) Set(s string) error {
+	if s == "" {
+		*list = nil
+		return nil
+	}
+
+	*list = strings.Split(s, ",")
+	return nil
+}
+
 func FlagSet(name string) *flag.FlagSet {
 	flags := flag.NewFlagSet("", flag.ExitOnError)
 	flags.Usage = usage(name, flags)
-	flags.Float64("min_confidence", 0, "Deprecated; use -ignore instead")
 	flags.String("tags", "", "List of `build tags`")
-	flags.String("ignore", "", "Space separated list of checks to ignore, in the following format: 'import/path/file.go:Check1,Check2,...' Both the import path and file name sections support globbing, e.g. 'os/exec/*_test.go'")
+	flags.String("ignore", "", "Deprecated: use linter directives instead")
 	flags.Bool("tests", true, "Include tests")
 	flags.Bool("version", false, "Print version and exit")
 	flags.Bool("show-ignored", false, "Don't filter ignored problems")
-	flags.String("f", "text", "Output `format` (valid choices are 'text' and 'json')")
+	flags.String("f", "text", "Output `format` (valid choices are 'stylish', 'text' and 'json')")
+
+	flags.Int("debug.max-concurrent-jobs", 0, "Number of jobs to run concurrently")
+	flags.Bool("debug.print-stats", false, "Print debug statistics")
+	flags.String("debug.cpuprofile", "", "Write CPU profile to `file`")
+	flags.String("debug.memprofile", "", "Write memory profile to `file`")
+
+	checks := list{"inherit"}
+	fail := list{"all"}
+	flags.Var(&checks, "checks", "Comma-separated list of `checks` to enable.")
+	flags.Var(&fail, "fail", "Comma-separated list of `checks` that can cause a non-zero exit status.")
 
 	tags := build.Default.ReleaseTags
 	v := tags[len(tags)-1][2:]
@@ -180,76 +131,129 @@ func FlagSet(name string) *flag.FlagSet {
 	return flags
 }
 
-type CheckerConfig struct {
+func ProcessFlagSet(cs []lint.Checker, fs *flag.FlagSet) {
-	Checker     lint.Checker
-	ExitNonZero bool
-}
-
-func ProcessFlagSet(confs []CheckerConfig, fs *flag.FlagSet) {
 	tags := fs.Lookup("tags").Value.(flag.Getter).Get().(string)
 	ignore := fs.Lookup("ignore").Value.(flag.Getter).Get().(string)
 	tests := fs.Lookup("tests").Value.(flag.Getter).Get().(bool)
 	goVersion := fs.Lookup("go").Value.(flag.Getter).Get().(int)
-	format := fs.Lookup("f").Value.(flag.Getter).Get().(string)
+	formatter := fs.Lookup("f").Value.(flag.Getter).Get().(string)
 	printVersion := fs.Lookup("version").Value.(flag.Getter).Get().(bool)
 	showIgnored := fs.Lookup("show-ignored").Value.(flag.Getter).Get().(bool)
 
-	if printVersion {
+	maxConcurrentJobs := fs.Lookup("debug.max-concurrent-jobs").Value.(flag.Getter).Get().(int)
-		version.Print()
+	printStats := fs.Lookup("debug.print-stats").Value.(flag.Getter).Get().(bool)
-		os.Exit(0)
+	cpuProfile := fs.Lookup("debug.cpuprofile").Value.(flag.Getter).Get().(string)
+	memProfile := fs.Lookup("debug.memprofile").Value.(flag.Getter).Get().(string)
+
+	cfg := config.Config{}
+	cfg.Checks = *fs.Lookup("checks").Value.(*list)
+
+	exit := func(code int) {
+		if cpuProfile != "" {
+			pprof.StopCPUProfile()
+		}
+		if memProfile != "" {
+			f, err := os.Create(memProfile)
+			if err != nil {
+				panic(err)
+			}
+			runtime.GC()
+			pprof.WriteHeapProfile(f)
+		}
+		os.Exit(code)
+	}
+	if cpuProfile != "" {
+		f, err := os.Create(cpuProfile)
+		if err != nil {
+			log.Fatal(err)
+		}
+		pprof.StartCPUProfile(f)
 	}
 
-	var cs []lint.Checker
+	if printVersion {
-	for _, conf := range confs {
+		version.Print()
-		cs = append(cs, conf.Checker)
+		exit(0)
 	}
-	pss, err := Lint(cs, fs.Args(), &Options{
+
+	ps, err := Lint(cs, fs.Args(), &Options{
 		Tags:          strings.Fields(tags),
 		LintTests:     tests,
 		Ignores:       ignore,
 		GoVersion:     goVersion,
 		ReturnIgnored: showIgnored,
+		Config:        cfg,
+
+		MaxConcurrentJobs: maxConcurrentJobs,
+		PrintStats:        printStats,
 	})
 	if err != nil {
 		fmt.Fprintln(os.Stderr, err)
-		os.Exit(1)
+		exit(1)
 	}
 
-	var ps []lint.Problem
+	var f format.Formatter
-	for _, p := range pss {
+	switch formatter {
-		ps = append(ps, p...)
-	}
-
-	var f OutputFormatter
-	switch format {
 	case "text":
-		f = TextOutput{os.Stdout}
+		f = format.Text{W: os.Stdout}
+	case "stylish":
+		f = &format.Stylish{W: os.Stdout}
 	case "json":
-		f = JSONOutput{os.Stdout}
+		f = format.JSON{W: os.Stdout}
 	default:
-		fmt.Fprintf(os.Stderr, "unsupported output format %q\n", format)
+		fmt.Fprintf(os.Stderr, "unsupported output format %q\n", formatter)
-		os.Exit(2)
+		exit(2)
 	}
 
+	var (
+		total    int
+		errors   int
+		warnings int
+	)
+
+	fail := *fs.Lookup("fail").Value.(*list)
+	var allChecks []string
 	for _, p := range ps {
+		allChecks = append(allChecks, p.Check)
+	}
+
+	shouldExit := lint.FilterChecks(allChecks, fail)
+
+	total = len(ps)
+	for _, p := range ps {
+		if shouldExit[p.Check] {
+			errors++
+		} else {
+			p.Severity = lint.Warning
+			warnings++
+		}
 		f.Format(p)
 	}
-	for i, p := range pss {
+	if f, ok := f.(format.Statter); ok {
-		if len(p) != 0 && confs[i].ExitNonZero {
+		f.Stats(total, errors, warnings)
-			os.Exit(1)
 	}
+	if errors > 0 {
+		exit(1)
 	}
 }
 
 type Options struct {
+	Config config.Config
+
 	Tags          []string
 	LintTests     bool
 	Ignores       string
 	GoVersion     int
 	ReturnIgnored bool
+
+	MaxConcurrentJobs int
+	PrintStats        bool
+}
+
+func Lint(cs []lint.Checker, paths []string, opt *Options) ([]lint.Problem, error) {
+	stats := lint.PerfStats{
+		CheckerInits: map[string]time.Duration{},
 	}
 
-func Lint(cs []lint.Checker, pkgs []string, opt *Options) ([][]lint.Problem, error) {
 	if opt == nil {
 		opt = &Options{}
 	}
@@ -257,94 +261,102 @@ func Lint(cs []lint.Checker, pkgs []string, opt *Options) ([][]lint.Problem, err
 	if err != nil {
 		return nil, err
 	}
-	paths := gotool.ImportPaths(pkgs)
+
-	goFiles, err := resolveRelative(paths, opt.Tags)
+	conf := &packages.Config{
-	if err != nil {
+		Mode:  packages.LoadAllSyntax,
-		return nil, err
+		Tests: opt.LintTests,
-	}
+		BuildFlags: []string{
-	ctx := build.Default
+			"-tags=" + strings.Join(opt.Tags, " "),
-	ctx.BuildTags = opt.Tags
-	hadError := false
-	conf := &loader.Config{
-		Build:      &ctx,
-		ParserMode: parser.ParseComments,
-		ImportPkgs: map[string]bool{},
-		TypeChecker: types.Config{
-			Sizes: types.SizesFor(ctx.Compiler, ctx.GOARCH),
-			Error: func(err error) {
-				// Only print the first error found
-				if hadError {
-					return
-				}
-				hadError = true
-				fmt.Fprintln(os.Stderr, err)
 		},
-		},
-	}
-	if goFiles {
-		conf.CreateFromFilenames("adhoc", paths...)
-	} else {
-		for _, path := range paths {
-			conf.ImportPkgs[path] = opt.LintTests
-		}
-	}
-	lprog, err := conf.Load()
-	if err != nil {
-		return nil, err
 	}
 
-	var problems [][]lint.Problem
+	t := time.Now()
-	for _, c := range cs {
+	if len(paths) == 0 {
-		runner := &runner{
+		paths = []string{"."}
-			checker:       c,
-			tags:          opt.Tags,
-			ignores:       ignores,
-			version:       opt.GoVersion,
-			returnIgnored: opt.ReturnIgnored,
 	}
-		problems = append(problems, runner.lint(lprog, conf))
+	pkgs, err := packages.Load(conf, paths...)
+	if err != nil {
+		return nil, err
 	}
+	stats.PackageLoading = time.Since(t)
+
+	var problems []lint.Problem
+	workingPkgs := make([]*packages.Package, 0, len(pkgs))
+	for _, pkg := range pkgs {
+		if pkg.IllTyped {
+			problems = append(problems, compileErrors(pkg)...)
+		} else {
+			workingPkgs = append(workingPkgs, pkg)
+		}
+	}
+
+	if len(workingPkgs) == 0 {
 		return problems, nil
 	}
 
-func shortPath(path string) string {
+	l := &lint.Linter{
-	cwd, err := os.Getwd()
+		Checkers:      cs,
-	if err != nil {
+		Ignores:       ignores,
-		return path
+		GoVersion:     opt.GoVersion,
+		ReturnIgnored: opt.ReturnIgnored,
+		Config:        opt.Config,
+
+		MaxConcurrentJobs: opt.MaxConcurrentJobs,
+		PrintStats:        opt.PrintStats,
 	}
-	if rel, err := filepath.Rel(cwd, path); err == nil && len(rel) < len(path) {
+	problems = append(problems, l.Lint(workingPkgs, &stats)...)
-		return rel
+
-	}
+	return problems, nil
-	return path
 }
 
-func relativePositionString(pos token.Position) string {
+var posRe = regexp.MustCompile(`^(.+?):(\d+)(?::(\d+)?)?$`)
-	s := shortPath(pos.Filename)
+
-	if pos.IsValid() {
+func parsePos(pos string) token.Position {
-		if s != "" {
+	if pos == "-" || pos == "" {
-			s += ":"
+		return token.Position{}
 	}
-		s += fmt.Sprintf("%d:%d", pos.Line, pos.Column)
+	parts := posRe.FindStringSubmatch(pos)
+	if parts == nil {
+		panic(fmt.Sprintf("internal error: malformed position %q", pos))
 	}
-	if s == "" {
+	file := parts[1]
-		s = "-"
+	line, _ := strconv.Atoi(parts[2])
+	col, _ := strconv.Atoi(parts[3])
+	return token.Position{
+		Filename: file,
+		Line:     line,
+		Column:   col,
 	}
-	return s
 }
 
-func ProcessArgs(name string, cs []CheckerConfig, args []string) {
+func compileErrors(pkg *packages.Package) []lint.Problem {
+	if !pkg.IllTyped {
+		return nil
+	}
+	if len(pkg.Errors) == 0 {
+		// transitively ill-typed
+		var ps []lint.Problem
+		for _, imp := range pkg.Imports {
+			ps = append(ps, compileErrors(imp)...)
+		}
+		return ps
+	}
+	var ps []lint.Problem
+	for _, err := range pkg.Errors {
+		p := lint.Problem{
+			Position: parsePos(err.Pos),
+			Text:     err.Msg,
+			Checker:  "compiler",
+			Check:    "compile",
+		}
+		ps = append(ps, p)
+	}
+	return ps
+}
+
+func ProcessArgs(name string, cs []lint.Checker, args []string) {
 	flags := FlagSet(name)
 	flags.Parse(args)
 
 	ProcessFlagSet(cs, flags)
 }
-
-func (runner *runner) lint(lprog *loader.Program, conf *loader.Config) []lint.Problem {
-	l := &lint.Linter{
-		Checker:       runner.checker,
-		Ignores:       runner.ignores,
-		GoVersion:     runner.version,
-		ReturnIgnored: runner.returnIgnored,
-	}
-	return l.Lint(lprog, conf)
-}

vendor/honnef.co/go/tools/simple/lint.go

@@ -9,6 +9,7 @@ import (
 	"reflect"
 	"strings"
 
+	. "honnef.co/go/tools/arg"
 	"honnef.co/go/tools/internal/sharedcheck"
 	"honnef.co/go/tools/lint"
 	. "honnef.co/go/tools/lint/lintdsl"
@@ -32,57 +33,40 @@ func (*Checker) Prefix() string { return "S" }
 
 func (c *Checker) Init(prog *lint.Program) {}
 
-func (c *Checker) Funcs() map[string]lint.Func {
+func (c *Checker) Checks() []lint.Check {
-	return map[string]lint.Func{
+	return []lint.Check{
-		"S1000": c.LintSingleCaseSelect,
+		{ID: "S1000", FilterGenerated: true, Fn: c.LintSingleCaseSelect},
-		"S1001": c.LintLoopCopy,
+		{ID: "S1001", FilterGenerated: true, Fn: c.LintLoopCopy},
-		"S1002": c.LintIfBoolCmp,
+		{ID: "S1002", FilterGenerated: true, Fn: c.LintIfBoolCmp},
-		"S1003": c.LintStringsContains,
+		{ID: "S1003", FilterGenerated: true, Fn: c.LintStringsContains},
-		"S1004": c.LintBytesCompare,
+		{ID: "S1004", FilterGenerated: true, Fn: c.LintBytesCompare},
-		"S1005": c.LintUnnecessaryBlank,
+		{ID: "S1005", FilterGenerated: true, Fn: c.LintUnnecessaryBlank},
-		"S1006": c.LintForTrue,
+		{ID: "S1006", FilterGenerated: true, Fn: c.LintForTrue},
-		"S1007": c.LintRegexpRaw,
+		{ID: "S1007", FilterGenerated: true, Fn: c.LintRegexpRaw},
-		"S1008": c.LintIfReturn,
+		{ID: "S1008", FilterGenerated: true, Fn: c.LintIfReturn},
-		"S1009": c.LintRedundantNilCheckWithLen,
+		{ID: "S1009", FilterGenerated: true, Fn: c.LintRedundantNilCheckWithLen},
-		"S1010": c.LintSlicing,
+		{ID: "S1010", FilterGenerated: true, Fn: c.LintSlicing},
-		"S1011": c.LintLoopAppend,
+		{ID: "S1011", FilterGenerated: true, Fn: c.LintLoopAppend},
-		"S1012": c.LintTimeSince,
+		{ID: "S1012", FilterGenerated: true, Fn: c.LintTimeSince},
-		"S1013": nil,
+		{ID: "S1016", FilterGenerated: true, Fn: c.LintSimplerStructConversion},
-		"S1014": nil,
+		{ID: "S1017", FilterGenerated: true, Fn: c.LintTrim},
-		"S1015": nil,
+		{ID: "S1018", FilterGenerated: true, Fn: c.LintLoopSlide},
-		"S1016": c.LintSimplerStructConversion,
+		{ID: "S1019", FilterGenerated: true, Fn: c.LintMakeLenCap},
-		"S1017": c.LintTrim,
+		{ID: "S1020", FilterGenerated: true, Fn: c.LintAssertNotNil},
-		"S1018": c.LintLoopSlide,
+		{ID: "S1021", FilterGenerated: true, Fn: c.LintDeclareAssign},
-		"S1019": c.LintMakeLenCap,
+		{ID: "S1023", FilterGenerated: true, Fn: c.LintRedundantBreak},
-		"S1020": c.LintAssertNotNil,
+		{ID: "S1024", FilterGenerated: true, Fn: c.LintTimeUntil},
-		"S1021": c.LintDeclareAssign,
+		{ID: "S1025", FilterGenerated: true, Fn: c.LintRedundantSprintf},
-		"S1022": nil,
+		{ID: "S1028", FilterGenerated: true, Fn: c.LintErrorsNewSprintf},
-		"S1023": c.LintRedundantBreak,
+		{ID: "S1029", FilterGenerated: false, Fn: c.LintRangeStringRunes},
-		"S1024": c.LintTimeUntil,
+		{ID: "S1030", FilterGenerated: true, Fn: c.LintBytesBufferConversions},
-		"S1025": c.LintRedundantSprintf,
+		{ID: "S1031", FilterGenerated: true, Fn: c.LintNilCheckAroundRange},
-		"S1026": nil,
+		{ID: "S1032", FilterGenerated: true, Fn: c.LintSortHelpers},
-		"S1027": nil,
+		{ID: "S1033", FilterGenerated: true, Fn: c.LintGuardedDelete},
-		"S1028": c.LintErrorsNewSprintf,
+		{ID: "S1034", FilterGenerated: true, Fn: c.LintSimplifyTypeSwitch},
-		"S1029": c.LintRangeStringRunes,
-		"S1030": c.LintBytesBufferConversions,
-		"S1031": c.LintNilCheckAroundRange,
-		"S1032": c.LintSortHelpers,
 	}
 }
 
-func (c *Checker) filterGenerated(files []*ast.File) []*ast.File {
-	if c.CheckGenerated {
-		return files
-	}
-	var out []*ast.File
-	for _, f := range files {
-		if !IsGenerated(f) {
-			out = append(out, f)
-		}
-	}
-	return out
-}
-
 func (c *Checker) LintSingleCaseSelect(j *lint.Job) {
 	isSingleSelect := func(node ast.Node) bool {
 		v, ok := node.(*ast.SelectStmt)
@@ -120,7 +104,7 @@ func (c *Checker) LintSingleCaseSelect(j *lint.Job) {
 		}
 		return true
 	}
-	for _, f := range c.filterGenerated(j.Program.Files) {
+	for _, f := range j.Program.Files {
 		ast.Inspect(f, fn)
 	}
 }
@@ -149,7 +133,8 @@ func (c *Checker) LintLoopCopy(j *lint.Job) {
 		if !ok {
 			return true
 		}
-		if _, ok := j.Program.Info.TypeOf(lhs.X).(*types.Slice); !ok {
+
+		if _, ok := TypeOf(j, lhs.X).(*types.Slice); !ok {
 			return true
 		}
 		lidx, ok := lhs.Index.(*ast.Ident)
@@ -160,16 +145,16 @@ func (c *Checker) LintLoopCopy(j *lint.Job) {
 		if !ok {
 			return true
 		}
-		if j.Program.Info.TypeOf(lhs) == nil || j.Program.Info.TypeOf(stmt.Rhs[0]) == nil {
+		if TypeOf(j, lhs) == nil || TypeOf(j, stmt.Rhs[0]) == nil {
 			return true
 		}
-		if j.Program.Info.ObjectOf(lidx) != j.Program.Info.ObjectOf(key) {
+		if ObjectOf(j, lidx) != ObjectOf(j, key) {
 			return true
 		}
-		if !types.Identical(j.Program.Info.TypeOf(lhs), j.Program.Info.TypeOf(stmt.Rhs[0])) {
+		if !types.Identical(TypeOf(j, lhs), TypeOf(j, stmt.Rhs[0])) {
 			return true
 		}
-		if _, ok := j.Program.Info.TypeOf(loop.X).(*types.Slice); !ok {
+		if _, ok := TypeOf(j, loop.X).(*types.Slice); !ok {
 			return true
 		}
 
@@ -183,7 +168,7 @@ func (c *Checker) LintLoopCopy(j *lint.Job) {
 			if !ok {
 				return true
 			}
-			if j.Program.Info.ObjectOf(ridx) != j.Program.Info.ObjectOf(key) {
+			if ObjectOf(j, ridx) != ObjectOf(j, key) {
 				return true
 			}
 		} else if rhs, ok := stmt.Rhs[0].(*ast.Ident); ok {
@@ -191,7 +176,7 @@ func (c *Checker) LintLoopCopy(j *lint.Job) {
 			if !ok {
 				return true
 			}
-			if j.Program.Info.ObjectOf(rhs) != j.Program.Info.ObjectOf(value) {
+			if ObjectOf(j, rhs) != ObjectOf(j, value) {
 				return true
 			}
 		} else {
@@ -200,7 +185,7 @@ func (c *Checker) LintLoopCopy(j *lint.Job) {
 		j.Errorf(loop, "should use copy() instead of a loop")
 		return true
 	}
-	for _, f := range c.filterGenerated(j.Program.Files) {
+	for _, f := range j.Program.Files {
 		ast.Inspect(f, fn)
 	}
 }
@@ -225,7 +210,7 @@ func (c *Checker) LintIfBoolCmp(j *lint.Job) {
 			val = BoolConst(j, expr.Y)
 			other = expr.X
 		}
-		basic, ok := j.Program.Info.TypeOf(other).Underlying().(*types.Basic)
+		basic, ok := TypeOf(j, other).Underlying().(*types.Basic)
 		if !ok || basic.Kind() != types.Bool {
 			return true
 		}
@@ -239,10 +224,13 @@ func (c *Checker) LintIfBoolCmp(j *lint.Job) {
 		if (l1-len(r))%2 == 1 {
 			r = "!" + r
 		}
+		if IsInTest(j, node) {
+			return true
+		}
 		j.Errorf(expr, "should omit comparison to bool constant, can be simplified to %s", r)
 		return true
 	}
-	for _, f := range c.filterGenerated(j.Program.Files) {
+	for _, f := range j.Program.Files {
 		ast.Inspect(f, fn)
 	}
 }
@@ -263,7 +251,7 @@ func (c *Checker) LintBytesBufferConversions(j *lint.Job) {
 			return true
 		}
 
-		typ := j.Program.Info.TypeOf(call.Fun)
+		typ := TypeOf(j, call.Fun)
 		if typ == types.Universe.Lookup("string").Type() && IsCallToAST(j, call.Args[0], "(*bytes.Buffer).Bytes") {
 			j.Errorf(call, "should use %v.String() instead of %v", Render(j, sel.X), Render(j, call))
 		} else if typ, ok := typ.(*types.Slice); ok && typ.Elem() == types.Universe.Lookup("byte").Type() && IsCallToAST(j, call.Args[0], "(*bytes.Buffer).String") {
@@ -272,7 +260,7 @@ func (c *Checker) LintBytesBufferConversions(j *lint.Job) {
 
 		return true
 	}
-	for _, f := range c.filterGenerated(j.Program.Files) {
+	for _, f := range j.Program.Files {
 		ast.Inspect(f, fn)
 	}
 }
@@ -344,7 +332,7 @@ func (c *Checker) LintStringsContains(j *lint.Job) {
 
 		return true
 	}
-	for _, f := range c.filterGenerated(j.Program.Files) {
+	for _, f := range j.Program.Files {
 		ast.Inspect(f, fn)
 	}
 }
@@ -377,7 +365,7 @@ func (c *Checker) LintBytesCompare(j *lint.Job) {
 		j.Errorf(node, "should use %sbytes.Equal(%s) instead", prefix, args)
 		return true
 	}
-	for _, f := range c.filterGenerated(j.Program.Files) {
+	for _, f := range j.Program.Files {
 		ast.Inspect(f, fn)
 	}
 }
@@ -397,7 +385,7 @@ func (c *Checker) LintForTrue(j *lint.Job) {
 		j.Errorf(loop, "should use for {} instead of for true {}")
 		return true
 	}
-	for _, f := range c.filterGenerated(j.Program.Files) {
+	for _, f := range j.Program.Files {
 		ast.Inspect(f, fn)
 	}
 }
@@ -420,7 +408,7 @@ func (c *Checker) LintRegexpRaw(j *lint.Job) {
 			// invalid function call
 			return true
 		}
-		lit, ok := call.Args[0].(*ast.BasicLit)
+		lit, ok := call.Args[Arg("regexp.Compile.expr")].(*ast.BasicLit)
 		if !ok {
 			// TODO(dominikh): support string concat, maybe support constants
 			return true
@@ -437,6 +425,9 @@ func (c *Checker) LintRegexpRaw(j *lint.Job) {
 		if !strings.Contains(val, `\\`) {
 			return true
 		}
+		if strings.Contains(val, "`") {
+			return true
+		}
 
 		bs := false
 		for _, c := range val {
@@ -457,7 +448,7 @@ func (c *Checker) LintRegexpRaw(j *lint.Job) {
 		j.Errorf(call, "should use raw string (`...`) with regexp.%s to avoid having to escape twice", sel.Sel.Name)
 		return true
 	}
-	for _, f := range c.filterGenerated(j.Program.Files) {
+	for _, f := range j.Program.Files {
 		ast.Inspect(f, fn)
 	}
 }
@@ -524,7 +515,7 @@ func (c *Checker) LintIfReturn(j *lint.Job) {
 		j.Errorf(n1, "should use 'return <expr>' instead of 'if <expr> { return <bool> }; return <bool>'")
 		return true
 	}
-	for _, f := range c.filterGenerated(j.Program.Files) {
+	for _, f := range j.Program.Files {
 		ast.Inspect(f, fn)
 	}
 }
@@ -547,7 +538,7 @@ func (c *Checker) LintRedundantNilCheckWithLen(j *lint.Job) {
 		if !ok {
 			return false, false
 		}
-		c, ok := j.Program.Info.ObjectOf(id).(*types.Const)
+		c, ok := ObjectOf(j, id).(*types.Const)
 		if !ok {
 			return false, false
 		}
@@ -600,7 +591,7 @@ func (c *Checker) LintRedundantNilCheckWithLen(j *lint.Job) {
 		if !ok || yxFun.Name != "len" || len(yx.Args) != 1 {
 			return true
 		}
-		yxArg, ok := yx.Args[0].(*ast.Ident)
+		yxArg, ok := yx.Args[Arg("len.v")].(*ast.Ident)
 		if !ok {
 			return true
 		}
@@ -643,7 +634,7 @@ func (c *Checker) LintRedundantNilCheckWithLen(j *lint.Job) {
 		// finally check that xx type is one of array, slice, map or chan
 		// this is to prevent false positive in case if xx is a pointer to an array
 		var nilType string
-		switch j.Program.Info.TypeOf(xx).(type) {
+		switch TypeOf(j, xx).(type) {
 		case *types.Slice:
 			nilType = "nil slices"
 		case *types.Map:
@@ -656,7 +647,7 @@ func (c *Checker) LintRedundantNilCheckWithLen(j *lint.Job) {
 		j.Errorf(expr, "should omit nil check; len() for %s is defined as zero", nilType)
 		return true
 	}
-	for _, f := range c.filterGenerated(j.Program.Files) {
+	for _, f := range j.Program.Files {
 		ast.Inspect(f, fn)
 	}
 }
@@ -682,29 +673,29 @@ func (c *Checker) LintSlicing(j *lint.Job) {
 		if !ok || fun.Name != "len" {
 			return true
 		}
-		if _, ok := j.Program.Info.ObjectOf(fun).(*types.Builtin); !ok {
+		if _, ok := ObjectOf(j, fun).(*types.Builtin); !ok {
 			return true
 		}
-		arg, ok := call.Args[0].(*ast.Ident)
+		arg, ok := call.Args[Arg("len.v")].(*ast.Ident)
 		if !ok || arg.Obj != s.Obj {
 			return true
 		}
 		j.Errorf(n, "should omit second index in slice, s[a:len(s)] is identical to s[a:]")
 		return true
 	}
-	for _, f := range c.filterGenerated(j.Program.Files) {
+	for _, f := range j.Program.Files {
 		ast.Inspect(f, fn)
 	}
 }
 
-func refersTo(info *types.Info, expr ast.Expr, ident *ast.Ident) bool {
+func refersTo(j *lint.Job, expr ast.Expr, ident *ast.Ident) bool {
 	found := false
 	fn := func(node ast.Node) bool {
 		ident2, ok := node.(*ast.Ident)
 		if !ok {
 			return true
 		}
-		if info.ObjectOf(ident) == info.ObjectOf(ident2) {
+		if ObjectOf(j, ident) == ObjectOf(j, ident2) {
 			found = true
 			return false
 		}
@@ -737,7 +728,7 @@ func (c *Checker) LintLoopAppend(j *lint.Job) {
 		if stmt.Tok != token.ASSIGN || len(stmt.Lhs) != 1 || len(stmt.Rhs) != 1 {
 			return true
 		}
-		if refersTo(j.Program.Info, stmt.Lhs[0], val) {
+		if refersTo(j, stmt.Lhs[0], val) {
 			return true
 		}
 		call, ok := stmt.Rhs[0].(*ast.CallExpr)
@@ -751,14 +742,14 @@ func (c *Checker) LintLoopAppend(j *lint.Job) {
 		if !ok {
 			return true
 		}
-		obj := j.Program.Info.ObjectOf(fun)
+		obj := ObjectOf(j, fun)
 		fn, ok := obj.(*types.Builtin)
 		if !ok || fn.Name() != "append" {
 			return true
 		}
 
-		src := j.Program.Info.TypeOf(loop.X)
+		src := TypeOf(j, loop.X)
-		dst := j.Program.Info.TypeOf(call.Args[0])
+		dst := TypeOf(j, call.Args[Arg("append.slice")])
 		// TODO(dominikh) remove nil check once Go issue #15173 has
 		// been fixed
 		if src == nil {
@@ -768,22 +759,22 @@ func (c *Checker) LintLoopAppend(j *lint.Job) {
 			return true
 		}
 
-		if Render(j, stmt.Lhs[0]) != Render(j, call.Args[0]) {
+		if Render(j, stmt.Lhs[0]) != Render(j, call.Args[Arg("append.slice")]) {
 			return true
 		}
 
-		el, ok := call.Args[1].(*ast.Ident)
+		el, ok := call.Args[Arg("append.elems")].(*ast.Ident)
 		if !ok {
 			return true
 		}
-		if j.Program.Info.ObjectOf(val) != j.Program.Info.ObjectOf(el) {
+		if ObjectOf(j, val) != ObjectOf(j, el) {
 			return true
 		}
 		j.Errorf(loop, "should replace loop with %s = append(%s, %s...)",
-			Render(j, stmt.Lhs[0]), Render(j, call.Args[0]), Render(j, loop.X))
+			Render(j, stmt.Lhs[0]), Render(j, call.Args[Arg("append.slice")]), Render(j, loop.X))
 		return true
 	}
-	for _, f := range c.filterGenerated(j.Program.Files) {
+	for _, f := range j.Program.Files {
 		ast.Inspect(f, fn)
 	}
 }
@@ -807,7 +798,7 @@ func (c *Checker) LintTimeSince(j *lint.Job) {
 		j.Errorf(call, "should use time.Since instead of time.Now().Sub")
 		return true
 	}
-	for _, f := range c.filterGenerated(j.Program.Files) {
+	for _, f := range j.Program.Files {
 		ast.Inspect(f, fn)
 	}
 }
@@ -824,13 +815,13 @@ func (c *Checker) LintTimeUntil(j *lint.Job) {
 		if !IsCallToAST(j, call, "(time.Time).Sub") {
 			return true
 		}
-		if !IsCallToAST(j, call.Args[0], "time.Now") {
+		if !IsCallToAST(j, call.Args[Arg("(time.Time).Sub.u")], "time.Now") {
 			return true
 		}
 		j.Errorf(call, "should use time.Until instead of t.Sub(time.Now())")
 		return true
 	}
-	for _, f := range c.filterGenerated(j.Program.Files) {
+	for _, f := range j.Program.Files {
 		ast.Inspect(f, fn)
 	}
 }
@@ -851,7 +842,7 @@ func (c *Checker) LintUnnecessaryBlank(j *lint.Job) {
 		case *ast.IndexExpr:
 			// The type-checker should make sure that it's a map, but
 			// let's be safe.
-			if _, ok := j.Program.Info.TypeOf(rhs.X).Underlying().(*types.Map); !ok {
+			if _, ok := TypeOf(j, rhs.X).Underlying().(*types.Map); !ok {
 				return
 			}
 		case *ast.UnaryExpr:
@@ -914,7 +905,7 @@ func (c *Checker) LintUnnecessaryBlank(j *lint.Job) {
 		}
 		return true
 	}
-	for _, f := range c.filterGenerated(j.Program.Files) {
+	for _, f := range j.Program.Files {
 		ast.Inspect(f, fn)
 	}
 }
@@ -938,7 +929,7 @@ func (c *Checker) LintSimplerStructConversion(j *lint.Job) {
 		if !ok {
 			return true
 		}
-		typ1, _ := j.Program.Info.TypeOf(lit.Type).(*types.Named)
+		typ1, _ := TypeOf(j, lit.Type).(*types.Named)
 		if typ1 == nil {
 			return true
 		}
@@ -958,7 +949,7 @@ func (c *Checker) LintSimplerStructConversion(j *lint.Job) {
 			if !ok {
 				return nil, nil, false
 			}
-			typ := j.Program.Info.TypeOf(sel.X)
+			typ := TypeOf(j, sel.X)
 			return typ, ident, typ != nil
 		}
 		if len(lit.Elts) == 0 {
@@ -1026,14 +1017,20 @@ func (c *Checker) LintSimplerStructConversion(j *lint.Job) {
 		if typ1 == typ2 {
 			return true
 		}
-		if !structsIdentical(s1, s2) {
+		if IsGoVersion(j, 8) {
+			if !types.IdenticalIgnoreTags(s1, s2) {
 				return true
 			}
+		} else {
+			if !types.Identical(s1, s2) {
+				return true
+			}
+		}
 		j.Errorf(node, "should convert %s (type %s) to %s instead of using struct literal",
 			ident.Name, typ2.Obj().Name(), typ1.Obj().Name())
 		return true
 	}
-	for _, f := range c.filterGenerated(j.Program.Files) {
+	for _, f := range j.Program.Files {
 		ast.Inspect(f, fn)
 	}
 }
@@ -1066,7 +1063,7 @@ func (c *Checker) LintTrim(j *lint.Job) {
 		if len(call.Args) != 1 {
 			return false
 		}
-		return sameNonDynamic(call.Args[0], ident)
+		return sameNonDynamic(call.Args[Arg("len.v")], ident)
 	}
 
 	fn := func(node ast.Node) bool {
@@ -1090,22 +1087,26 @@ func (c *Checker) LintTrim(j *lint.Job) {
 		if !ok {
 			return true
 		}
-		call, ok := condCall.Fun.(*ast.SelectorExpr)
+		switch {
-		if !ok {
+		case IsCallToAST(j, condCall, "strings.HasPrefix"):
-			return true
-		}
-		if IsIdent(call.X, "strings") {
 			pkg = "strings"
-		} else if IsIdent(call.X, "bytes") {
-			pkg = "bytes"
-		} else {
-			return true
-		}
-		if IsIdent(call.Sel, "HasPrefix") {
 			fun = "HasPrefix"
-		} else if IsIdent(call.Sel, "HasSuffix") {
+		case IsCallToAST(j, condCall, "strings.HasSuffix"):
+			pkg = "strings"
 			fun = "HasSuffix"
-		} else {
+		case IsCallToAST(j, condCall, "strings.Contains"):
+			pkg = "strings"
+			fun = "Contains"
+		case IsCallToAST(j, condCall, "bytes.HasPrefix"):
+			pkg = "bytes"
+			fun = "HasPrefix"
+		case IsCallToAST(j, condCall, "bytes.HasSuffix"):
+			pkg = "bytes"
+			fun = "HasSuffix"
+		case IsCallToAST(j, condCall, "bytes.Contains"):
+			pkg = "bytes"
+			fun = "Contains"
+		default:
 			return true
 		}
 
@@ -1122,7 +1123,23 @@ func (c *Checker) LintTrim(j *lint.Job) {
 		if !sameNonDynamic(condCall.Args[0], assign.Lhs[0]) {
 			return true
 		}
-		slice, ok := assign.Rhs[0].(*ast.SliceExpr)
+
+		switch rhs := assign.Rhs[0].(type) {
+		case *ast.CallExpr:
+			if len(rhs.Args) < 2 || !sameNonDynamic(condCall.Args[0], rhs.Args[0]) || !sameNonDynamic(condCall.Args[1], rhs.Args[1]) {
+				return true
+			}
+			if IsCallToAST(j, condCall, "strings.HasPrefix") && IsCallToAST(j, rhs, "strings.TrimPrefix") ||
+				IsCallToAST(j, condCall, "strings.HasSuffix") && IsCallToAST(j, rhs, "strings.TrimSuffix") ||
+				IsCallToAST(j, condCall, "strings.Contains") && IsCallToAST(j, rhs, "strings.Replace") ||
+				IsCallToAST(j, condCall, "bytes.HasPrefix") && IsCallToAST(j, rhs, "bytes.TrimPrefix") ||
+				IsCallToAST(j, condCall, "bytes.HasSuffix") && IsCallToAST(j, rhs, "bytes.TrimSuffix") ||
+				IsCallToAST(j, condCall, "bytes.Contains") && IsCallToAST(j, rhs, "bytes.Replace") {
+				j.Errorf(ifstmt, "should replace this if statement with an unconditional %s", CallNameAST(j, rhs))
+			}
+			return true
+		case *ast.SliceExpr:
+			slice := rhs
 			if !ok {
 				return true
 			}
@@ -1162,7 +1179,7 @@ func (c *Checker) LintTrim(j *lint.Job) {
 				if len(index.Args) != 1 {
 					return true
 				}
-			id3 := index.Args[0]
+				id3 := index.Args[Arg("len.v")]
 				switch oid3 := condCall.Args[1].(type) {
 				case *ast.BasicLit:
 					if pkg != "strings" {
@@ -1218,8 +1235,11 @@ func (c *Checker) LintTrim(j *lint.Job) {
 			}
 			j.Errorf(ifstmt, "should replace this if statement with an unconditional %s.%s", pkg, replacement)
 			return true
+		default:
+			return true
 		}
-	for _, f := range c.filterGenerated(j.Program.Files) {
+	}
+	for _, f := range j.Program.Files {
 		ast.Inspect(f, fn)
 	}
 }
@@ -1258,7 +1278,7 @@ func (c *Checker) LintLoopSlide(j *lint.Job) {
 			return true
 		}
 		postvar, ok := post.X.(*ast.Ident)
-		if !ok || j.Program.Info.ObjectOf(postvar) != j.Program.Info.ObjectOf(initvar) {
+		if !ok || ObjectOf(j, postvar) != ObjectOf(j, initvar) {
 			return true
 		}
 		bin, ok := loop.Cond.(*ast.BinaryExpr)
@@ -1266,7 +1286,7 @@ func (c *Checker) LintLoopSlide(j *lint.Job) {
 			return true
 		}
 		binx, ok := bin.X.(*ast.Ident)
-		if !ok || j.Program.Info.ObjectOf(binx) != j.Program.Info.ObjectOf(initvar) {
+		if !ok || ObjectOf(j, binx) != ObjectOf(j, initvar) {
 			return true
 		}
 		biny, ok := bin.Y.(*ast.Ident)
@@ -1295,8 +1315,8 @@ func (c *Checker) LintLoopSlide(j *lint.Job) {
 		if !ok {
 			return true
 		}
-		obj1 := j.Program.Info.ObjectOf(bs1)
+		obj1 := ObjectOf(j, bs1)
-		obj2 := j.Program.Info.ObjectOf(bs2)
+		obj2 := ObjectOf(j, bs2)
 		if obj1 != obj2 {
 			return true
 		}
@@ -1305,7 +1325,7 @@ func (c *Checker) LintLoopSlide(j *lint.Job) {
 		}
 
 		index1, ok := lhs.Index.(*ast.Ident)
-		if !ok || j.Program.Info.ObjectOf(index1) != j.Program.Info.ObjectOf(initvar) {
+		if !ok || ObjectOf(j, index1) != ObjectOf(j, initvar) {
 			return true
 		}
 		index2, ok := rhs.Index.(*ast.BinaryExpr)
@@ -1317,14 +1337,14 @@ func (c *Checker) LintLoopSlide(j *lint.Job) {
 			return true
 		}
 		add2, ok := index2.Y.(*ast.Ident)
-		if !ok || j.Program.Info.ObjectOf(add2) != j.Program.Info.ObjectOf(initvar) {
+		if !ok || ObjectOf(j, add2) != ObjectOf(j, initvar) {
 			return true
 		}
 
 		j.Errorf(loop, "should use copy(%s[:%s], %s[%s:]) instead", Render(j, bs1), Render(j, biny), Render(j, bs1), Render(j, add1))
 		return true
 	}
-	for _, f := range c.filterGenerated(j.Program.Files) {
+	for _, f := range j.Program.Files {
 		ast.Inspect(f, fn)
 	}
 }
@@ -1342,21 +1362,23 @@ func (c *Checker) LintMakeLenCap(j *lint.Job) {
 		switch len(call.Args) {
 		case 2:
 			// make(T, len)
-			if _, ok := j.Program.Info.TypeOf(call.Args[0]).Underlying().(*types.Slice); ok {
+			if _, ok := TypeOf(j, call.Args[Arg("make.t")]).Underlying().(*types.Slice); ok {
 				break
 			}
-			if IsZero(call.Args[1]) {
+			if IsZero(call.Args[Arg("make.size[0]")]) {
-				j.Errorf(call.Args[1], "should use make(%s) instead", Render(j, call.Args[0]))
+				j.Errorf(call.Args[Arg("make.size[0]")], "should use make(%s) instead", Render(j, call.Args[Arg("make.t")]))
 			}
 		case 3:
 			// make(T, len, cap)
-			if Render(j, call.Args[1]) == Render(j, call.Args[2]) {
+			if Render(j, call.Args[Arg("make.size[0]")]) == Render(j, call.Args[Arg("make.size[1]")]) {
-				j.Errorf(call.Args[1], "should use make(%s, %s) instead", Render(j, call.Args[0]), Render(j, call.Args[1]))
+				j.Errorf(call.Args[Arg("make.size[0]")],
+					"should use make(%s, %s) instead",
+					Render(j, call.Args[Arg("make.t")]), Render(j, call.Args[Arg("make.size[0]")]))
 			}
 		}
 		return false
 	}
-	for _, f := range c.filterGenerated(j.Program.Files) {
+	for _, f := range j.Program.Files {
 		ast.Inspect(f, fn)
 	}
 }
@@ -1383,7 +1405,7 @@ func (c *Checker) LintAssertNotNil(j *lint.Job) {
 		}
 		return true
 	}
-	fn := func(node ast.Node) bool {
+	fn1 := func(node ast.Node) bool {
 		ifstmt, ok := node.(*ast.IfStmt)
 		if !ok {
 			return true
@@ -1415,7 +1437,72 @@ func (c *Checker) LintAssertNotNil(j *lint.Job) {
 		j.Errorf(ifstmt, "when %s is true, %s can't be nil", Render(j, assignIdent), Render(j, assertIdent))
 		return true
 	}
-	for _, f := range c.filterGenerated(j.Program.Files) {
+	fn2 := func(node ast.Node) bool {
+		// Check that outer ifstmt is an 'if x != nil {}'
+		ifstmt, ok := node.(*ast.IfStmt)
+		if !ok {
+			return true
+		}
+		if ifstmt.Init != nil {
+			return true
+		}
+		if ifstmt.Else != nil {
+			return true
+		}
+		if len(ifstmt.Body.List) != 1 {
+			return true
+		}
+		binop, ok := ifstmt.Cond.(*ast.BinaryExpr)
+		if !ok {
+			return true
+		}
+		if binop.Op != token.NEQ {
+			return true
+		}
+		lhs, ok := binop.X.(*ast.Ident)
+		if !ok {
+			return true
+		}
+		if !IsNil(j, binop.Y) {
+			return true
+		}
+
+		// Check that inner ifstmt is an `if _, ok := x.(T); ok {}`
+		ifstmt, ok = ifstmt.Body.List[0].(*ast.IfStmt)
+		if !ok {
+			return true
+		}
+		assign, ok := ifstmt.Init.(*ast.AssignStmt)
+		if !ok || len(assign.Lhs) != 2 || len(assign.Rhs) != 1 || !IsBlank(assign.Lhs[0]) {
+			return true
+		}
+		assert, ok := assign.Rhs[0].(*ast.TypeAssertExpr)
+		if !ok {
+			return true
+		}
+		assertIdent, ok := assert.X.(*ast.Ident)
+		if !ok {
+			return true
+		}
+		if lhs.Obj != assertIdent.Obj {
+			return true
+		}
+		assignIdent, ok := assign.Lhs[1].(*ast.Ident)
+		if !ok {
+			return true
+		}
+		if !isOKCheck(assignIdent, ifstmt.Cond) {
+			return true
+		}
+		j.Errorf(ifstmt, "when %s is true, %s can't be nil", Render(j, assignIdent), Render(j, assertIdent))
+		return true
+	}
+	fn := func(node ast.Node) bool {
+		b1 := fn1(node)
+		b2 := fn2(node)
+		return b1 || b2
+	}
+	for _, f := range j.Program.Files {
 		ast.Inspect(f, fn)
 	}
 }
@@ -1459,14 +1546,14 @@ func (c *Checker) LintDeclareAssign(j *lint.Job) {
 				continue
 			}
 
-			if refersTo(j.Program.Info, assign.Rhs[0], ident) {
+			if refersTo(j, assign.Rhs[0], ident) {
 				continue
 			}
 			j.Errorf(decl, "should merge variable declaration with assignment on next line")
 		}
 		return true
 	}
-	for _, f := range c.filterGenerated(j.Program.Files) {
+	for _, f := range j.Program.Files {
 		ast.Inspect(f, fn)
 	}
 }
@@ -1485,7 +1572,6 @@ func (c *Checker) LintRedundantBreak(j *lint.Job) {
 			return
 		}
 		j.Errorf(branch, "redundant break statement")
-		return
 	}
 	fn2 := func(node ast.Node) {
 		var ret *ast.FieldList
@@ -1519,7 +1605,7 @@ func (c *Checker) LintRedundantBreak(j *lint.Job) {
 		fn2(node)
 		return true
 	}
-	for _, f := range c.filterGenerated(j.Program.Files) {
+	for _, f := range j.Program.Files {
 		ast.Inspect(f, fn)
 	}
 }
@@ -1534,11 +1620,11 @@ func (c *Checker) Implements(j *lint.Job, typ types.Type, iface string) bool {
 		ifaceName = iface
 	} else {
 		pkgName := iface[:idx]
-		pkg := j.Program.Prog.Package(pkgName)
+		pkg := j.Program.Package(pkgName)
 		if pkg == nil {
 			return false
 		}
-		scope = pkg.Pkg.Scope()
+		scope = pkg.Types.Scope()
 		ifaceName = iface[idx+1:]
 	}
 
@@ -1565,12 +1651,11 @@ func (c *Checker) LintRedundantSprintf(j *lint.Job) {
 		if len(call.Args) != 2 {
 			return true
 		}
-		if s, ok := ExprToString(j, call.Args[0]); !ok || s != "%s" {
+		if s, ok := ExprToString(j, call.Args[Arg("fmt.Sprintf.format")]); !ok || s != "%s" {
 			return true
 		}
-		pkg := j.NodePackage(call)
+		arg := call.Args[Arg("fmt.Sprintf.a[0]")]
-		arg := call.Args[1]
+		typ := TypeOf(j, arg)
-		typ := pkg.Info.TypeOf(arg)
 
 		if c.Implements(j, typ, "fmt.Stringer") {
 			j.Errorf(call, "should use String() instead of fmt.Sprintf")
@@ -1586,7 +1671,7 @@ func (c *Checker) LintRedundantSprintf(j *lint.Job) {
 		}
 		return true
 	}
-	for _, f := range c.filterGenerated(j.Program.Files) {
+	for _, f := range j.Program.Files {
 		ast.Inspect(f, fn)
 	}
 }
@@ -1597,13 +1682,13 @@ func (c *Checker) LintErrorsNewSprintf(j *lint.Job) {
 			return true
 		}
 		call := node.(*ast.CallExpr)
-		if !IsCallToAST(j, call.Args[0], "fmt.Sprintf") {
+		if !IsCallToAST(j, call.Args[Arg("errors.New.text")], "fmt.Sprintf") {
 			return true
 		}
 		j.Errorf(node, "should use fmt.Errorf(...) instead of errors.New(fmt.Sprintf(...))")
 		return true
 	}
-	for _, f := range c.filterGenerated(j.Program.Files) {
+	for _, f := range j.Program.Files {
 		ast.Inspect(f, fn)
 	}
 }
@@ -1643,13 +1728,13 @@ func (c *Checker) LintNilCheckAroundRange(j *lint.Job) {
 		if ifXIdent.Obj != rangeXIdent.Obj {
 			return true
 		}
-		switch j.Program.Info.TypeOf(rangeXIdent).(type) {
+		switch TypeOf(j, rangeXIdent).(type) {
 		case *types.Slice, *types.Map:
 			j.Errorf(node, "unnecessary nil check around range")
 		}
 		return true
 	}
-	for _, f := range c.filterGenerated(j.Program.Files) {
+	for _, f := range j.Program.Files {
 		ast.Inspect(f, fn)
 	}
 }
@@ -1708,7 +1793,7 @@ func (c *Checker) LintSortHelpers(j *lint.Job) {
 				return false
 			}
 			call := node.(*ast.CallExpr)
-			typeconv := call.Args[0].(*ast.CallExpr)
+			typeconv := call.Args[Arg("sort.Sort.data")].(*ast.CallExpr)
 			sel := typeconv.Fun.(*ast.SelectorExpr)
 			name := SelectorName(j, sel)
 
@@ -1733,7 +1818,150 @@ func (c *Checker) LintSortHelpers(j *lint.Job) {
 		return false
 	}
 
-	for _, f := range c.filterGenerated(j.Program.Files) {
+	for _, f := range j.Program.Files {
 		ast.Inspect(f, fnFuncs)
 	}
 }
+
+func (c *Checker) LintGuardedDelete(j *lint.Job) {
+	isCommaOkMapIndex := func(stmt ast.Stmt) (b *ast.Ident, m ast.Expr, key ast.Expr, ok bool) {
+		// Has to be of the form `_, <b:*ast.Ident> = <m:*types.Map>[<key>]
+
+		assign, ok := stmt.(*ast.AssignStmt)
+		if !ok {
+			return nil, nil, nil, false
+		}
+		if len(assign.Lhs) != 2 || len(assign.Rhs) != 1 {
+			return nil, nil, nil, false
+		}
+		if !IsBlank(assign.Lhs[0]) {
+			return nil, nil, nil, false
+		}
+		ident, ok := assign.Lhs[1].(*ast.Ident)
+		if !ok {
+			return nil, nil, nil, false
+		}
+		index, ok := assign.Rhs[0].(*ast.IndexExpr)
+		if !ok {
+			return nil, nil, nil, false
+		}
+		if _, ok := TypeOf(j, index.X).(*types.Map); !ok {
+			return nil, nil, nil, false
+		}
+		key = index.Index
+		return ident, index.X, key, true
+	}
+	fn := func(node ast.Node) bool {
+		stmt, ok := node.(*ast.IfStmt)
+		if !ok {
+			return true
+		}
+		if len(stmt.Body.List) != 1 {
+			return true
+		}
+		if stmt.Else != nil {
+			return true
+		}
+		expr, ok := stmt.Body.List[0].(*ast.ExprStmt)
+		if !ok {
+			return true
+		}
+		call, ok := expr.X.(*ast.CallExpr)
+		if !ok {
+			return true
+		}
+		if !IsCallToAST(j, call, "delete") {
+			return true
+		}
+		b, m, key, ok := isCommaOkMapIndex(stmt.Init)
+		if !ok {
+			return true
+		}
+		if cond, ok := stmt.Cond.(*ast.Ident); !ok || ObjectOf(j, cond) != ObjectOf(j, b) {
+			return true
+		}
+		if Render(j, call.Args[0]) != Render(j, m) || Render(j, call.Args[1]) != Render(j, key) {
+			return true
+		}
+		j.Errorf(stmt, "unnecessary guard around call to delete")
+		return true
+	}
+	for _, f := range j.Program.Files {
+		ast.Inspect(f, fn)
+	}
+}
+
+func (c *Checker) LintSimplifyTypeSwitch(j *lint.Job) {
+	fn := func(node ast.Node) bool {
+		stmt, ok := node.(*ast.TypeSwitchStmt)
+		if !ok {
+			return true
+		}
+		if stmt.Init != nil {
+			// bailing out for now, can't anticipate how type switches with initializers are being used
+			return true
+		}
+		expr, ok := stmt.Assign.(*ast.ExprStmt)
+		if !ok {
+			// the user is in fact assigning the result
+			return true
+		}
+		assert := expr.X.(*ast.TypeAssertExpr)
+		ident, ok := assert.X.(*ast.Ident)
+		if !ok {
+			return true
+		}
+		x := ObjectOf(j, ident)
+		var allOffenders []ast.Node
+		for _, clause := range stmt.Body.List {
+			clause := clause.(*ast.CaseClause)
+			if len(clause.List) != 1 {
+				continue
+			}
+			hasUnrelatedAssertion := false
+			var offenders []ast.Node
+			ast.Inspect(clause, func(node ast.Node) bool {
+				assert2, ok := node.(*ast.TypeAssertExpr)
+				if !ok {
+					return true
+				}
+				ident, ok := assert2.X.(*ast.Ident)
+				if !ok {
+					hasUnrelatedAssertion = true
+					return false
+				}
+				if ObjectOf(j, ident) != x {
+					hasUnrelatedAssertion = true
+					return false
+				}
+
+				if !types.Identical(TypeOf(j, clause.List[0]), TypeOf(j, assert2.Type)) {
+					hasUnrelatedAssertion = true
+					return false
+				}
+				offenders = append(offenders, assert2)
+				return true
+			})
+			if !hasUnrelatedAssertion {
+				// don't flag cases that have other type assertions
+				// unrelated to the one in the case clause. often
+				// times, this is done for symmetry, when two
+				// different values have to be asserted to the same
+				// type.
+				allOffenders = append(allOffenders, offenders...)
+			}
+		}
+		if len(allOffenders) != 0 {
+			at := ""
+			for _, offender := range allOffenders {
+				pos := j.Program.DisplayPosition(offender.Pos())
+				at += "\n\t" + pos.String()
+			}
+			j.Errorf(expr, "assigning the result of this type assertion to a variable (switch %s := %s.(type)) could eliminate the following type assertions:%s", Render(j, ident), Render(j, ident), at)
+		}
+		return true
+	}
+	for _, f := range j.Program.Files {
+		ast.Inspect(f, fn)
+	}
+}

vendor/honnef.co/go/tools/simple/lint17.go

@@ -1,7 +0,0 @@
-// +build !go1.8
-
-package simple
-
-import "go/types"
-
-var structsIdentical = types.Identical

vendor/honnef.co/go/tools/simple/lint18.go

@@ -1,7 +0,0 @@
-// +build go1.8
-
-package simple
-
-import "go/types"
-
-var structsIdentical = types.IdenticalIgnoreTags

vendor/honnef.co/go/tools/ssa/ssautil/load.go

@@ -12,9 +12,57 @@ import (
 	"go/types"
 
 	"golang.org/x/tools/go/loader"
+	"golang.org/x/tools/go/packages"
 	"honnef.co/go/tools/ssa"
 )
 
+// Packages creates an SSA program for a set of packages loaded from
+// source syntax using the golang.org/x/tools/go/packages.Load function.
+// It creates and returns an SSA package for each well-typed package in
+// the initial list. The resulting list of packages has the same length
+// as initial, and contains a nil if SSA could not be constructed for
+// the corresponding initial package.
+//
+// Code for bodies of functions is not built until Build is called
+// on the resulting Program.
+//
+// The mode parameter controls diagnostics and checking during SSA construction.
+//
+func Packages(initial []*packages.Package, mode ssa.BuilderMode) (*ssa.Program, []*ssa.Package) {
+	var fset *token.FileSet
+	if len(initial) > 0 {
+		fset = initial[0].Fset
+	}
+
+	prog := ssa.NewProgram(fset, mode)
+	seen := make(map[*packages.Package]*ssa.Package)
+	var create func(p *packages.Package) *ssa.Package
+	create = func(p *packages.Package) *ssa.Package {
+		ssapkg, ok := seen[p]
+		if !ok {
+			if p.Types == nil || p.IllTyped {
+				// not well typed
+				seen[p] = nil
+				return nil
+			}
+
+			ssapkg = prog.CreatePackage(p.Types, p.Syntax, p.TypesInfo, true)
+			seen[p] = ssapkg
+
+			for _, imp := range p.Imports {
+				create(imp)
+			}
+		}
+		return ssapkg
+	}
+
+	var ssapkgs []*ssa.Package
+	for _, p := range initial {
+		ssapkgs = append(ssapkgs, create(p))
+	}
+	return prog, ssapkgs
+}
+
 // CreateProgram returns a new program in SSA form, given a program
 // loaded from source.  An SSA package is created for each transitively
 // error-free package of lprog.

vendor/honnef.co/go/tools/ssautil/ssautil.go

@@ -0,0 +1,41 @@
+package ssautil
+
+import (
+	"honnef.co/go/tools/ssa"
+)
+
+func Reachable(from, to *ssa.BasicBlock) bool {
+	if from == to {
+		return true
+	}
+	if from.Dominates(to) {
+		return true
+	}
+
+	found := false
+	Walk(from, func(b *ssa.BasicBlock) bool {
+		if b == to {
+			found = true
+			return false
+		}
+		return true
+	})
+	return found
+}
+
+func Walk(b *ssa.BasicBlock, fn func(*ssa.BasicBlock) bool) {
+	seen := map[*ssa.BasicBlock]bool{}
+	wl := []*ssa.BasicBlock{b}
+	for len(wl) > 0 {
+		b := wl[len(wl)-1]
+		wl = wl[:len(wl)-1]
+		if seen[b] {
+			continue
+		}
+		seen[b] = true
+		if !fn(b) {
+			continue
+		}
+		wl = append(wl, b.Succs...)
+	}
+}

vendor/honnef.co/go/tools/stylecheck/lint.go

@@ -0,0 +1,643 @@
+package stylecheck // import "honnef.co/go/tools/stylecheck"
+
+import (
+	"fmt"
+	"go/ast"
+	"go/constant"
+	"go/token"
+	"go/types"
+	"strconv"
+	"strings"
+	"unicode"
+	"unicode/utf8"
+
+	"honnef.co/go/tools/lint"
+	. "honnef.co/go/tools/lint/lintdsl"
+	"honnef.co/go/tools/ssa"
+
+	"golang.org/x/tools/go/types/typeutil"
+)
+
+type Checker struct {
+	CheckGenerated bool
+}
+
+func NewChecker() *Checker {
+	return &Checker{}
+}
+
+func (*Checker) Name() string              { return "stylecheck" }
+func (*Checker) Prefix() string            { return "ST" }
+func (c *Checker) Init(prog *lint.Program) {}
+
+func (c *Checker) Checks() []lint.Check {
+	return []lint.Check{
+		{ID: "ST1000", FilterGenerated: false, Fn: c.CheckPackageComment},
+		{ID: "ST1001", FilterGenerated: true, Fn: c.CheckDotImports},
+		// {ID: "ST1002", FilterGenerated: true, Fn: c.CheckBlankImports},
+		{ID: "ST1003", FilterGenerated: true, Fn: c.CheckNames},
+		// {ID: "ST1004", FilterGenerated: false, Fn: nil, 			  },
+		{ID: "ST1005", FilterGenerated: false, Fn: c.CheckErrorStrings},
+		{ID: "ST1006", FilterGenerated: false, Fn: c.CheckReceiverNames},
+		// {ID: "ST1007", FilterGenerated: true, Fn: c.CheckIncDec},
+		{ID: "ST1008", FilterGenerated: false, Fn: c.CheckErrorReturn},
+		// {ID: "ST1009", FilterGenerated: false, Fn: c.CheckUnexportedReturn},
+		// {ID: "ST1010", FilterGenerated: false, Fn: c.CheckContextFirstArg},
+		{ID: "ST1011", FilterGenerated: false, Fn: c.CheckTimeNames},
+		{ID: "ST1012", FilterGenerated: false, Fn: c.CheckErrorVarNames},
+		{ID: "ST1013", FilterGenerated: true, Fn: c.CheckHTTPStatusCodes},
+		{ID: "ST1015", FilterGenerated: true, Fn: c.CheckDefaultCaseOrder},
+		{ID: "ST1016", FilterGenerated: false, Fn: c.CheckReceiverNamesIdentical},
+		{ID: "ST1017", FilterGenerated: true, Fn: c.CheckYodaConditions},
+	}
+}
+
+func (c *Checker) CheckPackageComment(j *lint.Job) {
+	// - At least one file in a non-main package should have a package comment
+	//
+	// - The comment should be of the form
+	// "Package x ...". This has a slight potential for false
+	// positives, as multiple files can have package comments, in
+	// which case they get appended. But that doesn't happen a lot in
+	// the real world.
+
+	for _, pkg := range j.Program.InitialPackages {
+		if pkg.Name == "main" {
+			continue
+		}
+		hasDocs := false
+		for _, f := range pkg.Syntax {
+			if IsInTest(j, f) {
+				continue
+			}
+			if f.Doc != nil && len(f.Doc.List) > 0 {
+				hasDocs = true
+				prefix := "Package " + f.Name.Name + " "
+				if !strings.HasPrefix(strings.TrimSpace(f.Doc.Text()), prefix) {
+					j.Errorf(f.Doc, `package comment should be of the form "%s..."`, prefix)
+				}
+				f.Doc.Text()
+			}
+		}
+
+		if !hasDocs {
+			for _, f := range pkg.Syntax {
+				if IsInTest(j, f) {
+					continue
+				}
+				j.Errorf(f, "at least one file in a package should have a package comment")
+			}
+		}
+	}
+}
+
+func (c *Checker) CheckDotImports(j *lint.Job) {
+	for _, pkg := range j.Program.InitialPackages {
+		for _, f := range pkg.Syntax {
+		imports:
+			for _, imp := range f.Imports {
+				path := imp.Path.Value
+				path = path[1 : len(path)-1]
+				for _, w := range pkg.Config.DotImportWhitelist {
+					if w == path {
+						continue imports
+					}
+				}
+
+				if imp.Name != nil && imp.Name.Name == "." && !IsInTest(j, f) {
+					j.Errorf(imp, "should not use dot imports")
+				}
+			}
+		}
+	}
+}
+
+func (c *Checker) CheckBlankImports(j *lint.Job) {
+	fset := j.Program.Fset()
+	for _, f := range j.Program.Files {
+		if IsInMain(j, f) || IsInTest(j, f) {
+			continue
+		}
+
+		// Collect imports of the form `import _ "foo"`, i.e. with no
+		// parentheses, as their comment will be associated with the
+		// (paren-free) GenDecl, not the import spec itself.
+		//
+		// We don't directly process the GenDecl so that we can
+		// correctly handle the following:
+		//
+		//  import _ "foo"
+		//  import _ "bar"
+		//
+		// where only the first import should get flagged.
+		skip := map[ast.Spec]bool{}
+		ast.Inspect(f, func(node ast.Node) bool {
+			switch node := node.(type) {
+			case *ast.File:
+				return true
+			case *ast.GenDecl:
+				if node.Tok != token.IMPORT {
+					return false
+				}
+				if node.Lparen == token.NoPos && node.Doc != nil {
+					skip[node.Specs[0]] = true
+				}
+				return false
+			}
+			return false
+		})
+		for i, imp := range f.Imports {
+			pos := fset.Position(imp.Pos())
+
+			if !IsBlank(imp.Name) {
+				continue
+			}
+			// Only flag the first blank import in a group of imports,
+			// or don't flag any of them, if the first one is
+			// commented
+			if i > 0 {
+				prev := f.Imports[i-1]
+				prevPos := fset.Position(prev.Pos())
+				if pos.Line-1 == prevPos.Line && IsBlank(prev.Name) {
+					continue
+				}
+			}
+
+			if imp.Doc == nil && imp.Comment == nil && !skip[imp] {
+				j.Errorf(imp, "a blank import should be only in a main or test package, or have a comment justifying it")
+			}
+		}
+	}
+}
+
+func (c *Checker) CheckIncDec(j *lint.Job) {
+	// TODO(dh): this can be noisy for function bodies that look like this:
+	// 	x += 3
+	// 	...
+	// 	x += 2
+	// 	...
+	// 	x += 1
+	fn := func(node ast.Node) bool {
+		assign, ok := node.(*ast.AssignStmt)
+		if !ok || (assign.Tok != token.ADD_ASSIGN && assign.Tok != token.SUB_ASSIGN) {
+			return true
+		}
+		if (len(assign.Lhs) != 1 || len(assign.Rhs) != 1) ||
+			!IsIntLiteral(assign.Rhs[0], "1") {
+			return true
+		}
+
+		suffix := ""
+		switch assign.Tok {
+		case token.ADD_ASSIGN:
+			suffix = "++"
+		case token.SUB_ASSIGN:
+			suffix = "--"
+		}
+
+		j.Errorf(assign, "should replace %s with %s%s", Render(j, assign), Render(j, assign.Lhs[0]), suffix)
+		return true
+	}
+	for _, f := range j.Program.Files {
+		ast.Inspect(f, fn)
+	}
+}
+
+func (c *Checker) CheckErrorReturn(j *lint.Job) {
+fnLoop:
+	for _, fn := range j.Program.InitialFunctions {
+		sig := fn.Type().(*types.Signature)
+		rets := sig.Results()
+		if rets == nil || rets.Len() < 2 {
+			continue
+		}
+
+		if rets.At(rets.Len()-1).Type() == types.Universe.Lookup("error").Type() {
+			// Last return type is error. If the function also returns
+			// errors in other positions, that's fine.
+			continue
+		}
+		for i := rets.Len() - 2; i >= 0; i-- {
+			if rets.At(i).Type() == types.Universe.Lookup("error").Type() {
+				j.Errorf(rets.At(i), "error should be returned as the last argument")
+				continue fnLoop
+			}
+		}
+	}
+}
+
+// CheckUnexportedReturn checks that exported functions on exported
+// types do not return unexported types.
+func (c *Checker) CheckUnexportedReturn(j *lint.Job) {
+	for _, fn := range j.Program.InitialFunctions {
+		if fn.Synthetic != "" || fn.Parent() != nil {
+			continue
+		}
+		if !ast.IsExported(fn.Name()) || IsInMain(j, fn) || IsInTest(j, fn) {
+			continue
+		}
+		sig := fn.Type().(*types.Signature)
+		if sig.Recv() != nil && !ast.IsExported(Dereference(sig.Recv().Type()).(*types.Named).Obj().Name()) {
+			continue
+		}
+		res := sig.Results()
+		for i := 0; i < res.Len(); i++ {
+			if named, ok := DereferenceR(res.At(i).Type()).(*types.Named); ok &&
+				!ast.IsExported(named.Obj().Name()) &&
+				named != types.Universe.Lookup("error").Type() {
+				j.Errorf(fn, "should not return unexported type")
+			}
+		}
+	}
+}
+
+func (c *Checker) CheckReceiverNames(j *lint.Job) {
+	for _, pkg := range j.Program.InitialPackages {
+		for _, m := range pkg.SSA.Members {
+			if T, ok := m.Object().(*types.TypeName); ok && !T.IsAlias() {
+				ms := typeutil.IntuitiveMethodSet(T.Type(), nil)
+				for _, sel := range ms {
+					fn := sel.Obj().(*types.Func)
+					recv := fn.Type().(*types.Signature).Recv()
+					if Dereference(recv.Type()) != T.Type() {
+						// skip embedded methods
+						continue
+					}
+					if recv.Name() == "self" || recv.Name() == "this" {
+						j.Errorf(recv, `receiver name should be a reflection of its identity; don't use generic names such as "this" or "self"`)
+					}
+					if recv.Name() == "_" {
+						j.Errorf(recv, "receiver name should not be an underscore, omit the name if it is unused")
+					}
+				}
+			}
+		}
+	}
+}
+
+func (c *Checker) CheckReceiverNamesIdentical(j *lint.Job) {
+	for _, pkg := range j.Program.InitialPackages {
+		for _, m := range pkg.SSA.Members {
+			names := map[string]int{}
+
+			var firstFn *types.Func
+			if T, ok := m.Object().(*types.TypeName); ok && !T.IsAlias() {
+				ms := typeutil.IntuitiveMethodSet(T.Type(), nil)
+				for _, sel := range ms {
+					fn := sel.Obj().(*types.Func)
+					recv := fn.Type().(*types.Signature).Recv()
+					if Dereference(recv.Type()) != T.Type() {
+						// skip embedded methods
+						continue
+					}
+					if firstFn == nil {
+						firstFn = fn
+					}
+					if recv.Name() != "" && recv.Name() != "_" {
+						names[recv.Name()]++
+					}
+				}
+			}
+
+			if len(names) > 1 {
+				var seen []string
+				for name, count := range names {
+					seen = append(seen, fmt.Sprintf("%dx %q", count, name))
+				}
+
+				j.Errorf(firstFn, "methods on the same type should have the same receiver name (seen %s)", strings.Join(seen, ", "))
+			}
+		}
+	}
+}
+
+func (c *Checker) CheckContextFirstArg(j *lint.Job) {
+	// TODO(dh): this check doesn't apply to test helpers. Example from the stdlib:
+	// 	func helperCommandContext(t *testing.T, ctx context.Context, s ...string) (cmd *exec.Cmd) {
+fnLoop:
+	for _, fn := range j.Program.InitialFunctions {
+		if fn.Synthetic != "" || fn.Parent() != nil {
+			continue
+		}
+		params := fn.Signature.Params()
+		if params.Len() < 2 {
+			continue
+		}
+		if types.TypeString(params.At(0).Type(), nil) == "context.Context" {
+			continue
+		}
+		for i := 1; i < params.Len(); i++ {
+			param := params.At(i)
+			if types.TypeString(param.Type(), nil) == "context.Context" {
+				j.Errorf(param, "context.Context should be the first argument of a function")
+				continue fnLoop
+			}
+		}
+	}
+}
+
+func (c *Checker) CheckErrorStrings(j *lint.Job) {
+	fnNames := map[*ssa.Package]map[string]bool{}
+	for _, fn := range j.Program.InitialFunctions {
+		m := fnNames[fn.Package()]
+		if m == nil {
+			m = map[string]bool{}
+			fnNames[fn.Package()] = m
+		}
+		m[fn.Name()] = true
+	}
+
+	for _, fn := range j.Program.InitialFunctions {
+		if IsInTest(j, fn) {
+			// We don't care about malformed error messages in tests;
+			// they're usually for direct human consumption, not part
+			// of an API
+			continue
+		}
+		for _, block := range fn.Blocks {
+		instrLoop:
+			for _, ins := range block.Instrs {
+				call, ok := ins.(*ssa.Call)
+				if !ok {
+					continue
+				}
+				if !IsCallTo(call.Common(), "errors.New") && !IsCallTo(call.Common(), "fmt.Errorf") {
+					continue
+				}
+
+				k, ok := call.Common().Args[0].(*ssa.Const)
+				if !ok {
+					continue
+				}
+
+				s := constant.StringVal(k.Value)
+				if len(s) == 0 {
+					continue
+				}
+				switch s[len(s)-1] {
+				case '.', ':', '!', '\n':
+					j.Errorf(call, "error strings should not end with punctuation or a newline")
+				}
+				idx := strings.IndexByte(s, ' ')
+				if idx == -1 {
+					// single word error message, probably not a real
+					// error but something used in tests or during
+					// debugging
+					continue
+				}
+				word := s[:idx]
+				first, n := utf8.DecodeRuneInString(word)
+				if !unicode.IsUpper(first) {
+					continue
+				}
+				for _, c := range word[n:] {
+					if unicode.IsUpper(c) {
+						// Word is probably an initialism or
+						// multi-word function name
+						continue instrLoop
+					}
+				}
+
+				word = strings.TrimRightFunc(word, func(r rune) bool { return unicode.IsPunct(r) })
+				if fnNames[fn.Package()][word] {
+					// Word is probably the name of a function in this package
+					continue
+				}
+				// First word in error starts with a capital
+				// letter, and the word doesn't contain any other
+				// capitals, making it unlikely to be an
+				// initialism or multi-word function name.
+				//
+				// It could still be a proper noun, though.
+
+				j.Errorf(call, "error strings should not be capitalized")
+			}
+		}
+	}
+}
+
+func (c *Checker) CheckTimeNames(j *lint.Job) {
+	suffixes := []string{
+		"Sec", "Secs", "Seconds",
+		"Msec", "Msecs",
+		"Milli", "Millis", "Milliseconds",
+		"Usec", "Usecs", "Microseconds",
+		"MS", "Ms",
+	}
+	fn := func(T types.Type, names []*ast.Ident) {
+		if !IsType(T, "time.Duration") && !IsType(T, "*time.Duration") {
+			return
+		}
+		for _, name := range names {
+			for _, suffix := range suffixes {
+				if strings.HasSuffix(name.Name, suffix) {
+					j.Errorf(name, "var %s is of type %v; don't use unit-specific suffix %q", name.Name, T, suffix)
+					break
+				}
+			}
+		}
+	}
+	for _, f := range j.Program.Files {
+		ast.Inspect(f, func(node ast.Node) bool {
+			switch node := node.(type) {
+			case *ast.ValueSpec:
+				T := TypeOf(j, node.Type)
+				fn(T, node.Names)
+			case *ast.FieldList:
+				for _, field := range node.List {
+					T := TypeOf(j, field.Type)
+					fn(T, field.Names)
+				}
+			}
+			return true
+		})
+	}
+}
+
+func (c *Checker) CheckErrorVarNames(j *lint.Job) {
+	for _, f := range j.Program.Files {
+		for _, decl := range f.Decls {
+			gen, ok := decl.(*ast.GenDecl)
+			if !ok || gen.Tok != token.VAR {
+				continue
+			}
+			for _, spec := range gen.Specs {
+				spec := spec.(*ast.ValueSpec)
+				if len(spec.Names) != len(spec.Values) {
+					continue
+				}
+
+				for i, name := range spec.Names {
+					val := spec.Values[i]
+					if !IsCallToAST(j, val, "errors.New") && !IsCallToAST(j, val, "fmt.Errorf") {
+						continue
+					}
+
+					prefix := "err"
+					if name.IsExported() {
+						prefix = "Err"
+					}
+					if !strings.HasPrefix(name.Name, prefix) {
+						j.Errorf(name, "error var %s should have name of the form %sFoo", name.Name, prefix)
+					}
+				}
+			}
+		}
+	}
+}
+
+var httpStatusCodes = map[int]string{
+	100: "StatusContinue",
+	101: "StatusSwitchingProtocols",
+	102: "StatusProcessing",
+	200: "StatusOK",
+	201: "StatusCreated",
+	202: "StatusAccepted",
+	203: "StatusNonAuthoritativeInfo",
+	204: "StatusNoContent",
+	205: "StatusResetContent",
+	206: "StatusPartialContent",
+	207: "StatusMultiStatus",
+	208: "StatusAlreadyReported",
+	226: "StatusIMUsed",
+	300: "StatusMultipleChoices",
+	301: "StatusMovedPermanently",
+	302: "StatusFound",
+	303: "StatusSeeOther",
+	304: "StatusNotModified",
+	305: "StatusUseProxy",
+	307: "StatusTemporaryRedirect",
+	308: "StatusPermanentRedirect",
+	400: "StatusBadRequest",
+	401: "StatusUnauthorized",
+	402: "StatusPaymentRequired",
+	403: "StatusForbidden",
+	404: "StatusNotFound",
+	405: "StatusMethodNotAllowed",
+	406: "StatusNotAcceptable",
+	407: "StatusProxyAuthRequired",
+	408: "StatusRequestTimeout",
+	409: "StatusConflict",
+	410: "StatusGone",
+	411: "StatusLengthRequired",
+	412: "StatusPreconditionFailed",
+	413: "StatusRequestEntityTooLarge",
+	414: "StatusRequestURITooLong",
+	415: "StatusUnsupportedMediaType",
+	416: "StatusRequestedRangeNotSatisfiable",
+	417: "StatusExpectationFailed",
+	418: "StatusTeapot",
+	422: "StatusUnprocessableEntity",
+	423: "StatusLocked",
+	424: "StatusFailedDependency",
+	426: "StatusUpgradeRequired",
+	428: "StatusPreconditionRequired",
+	429: "StatusTooManyRequests",
+	431: "StatusRequestHeaderFieldsTooLarge",
+	451: "StatusUnavailableForLegalReasons",
+	500: "StatusInternalServerError",
+	501: "StatusNotImplemented",
+	502: "StatusBadGateway",
+	503: "StatusServiceUnavailable",
+	504: "StatusGatewayTimeout",
+	505: "StatusHTTPVersionNotSupported",
+	506: "StatusVariantAlsoNegotiates",
+	507: "StatusInsufficientStorage",
+	508: "StatusLoopDetected",
+	510: "StatusNotExtended",
+	511: "StatusNetworkAuthenticationRequired",
+}
+
+func (c *Checker) CheckHTTPStatusCodes(j *lint.Job) {
+	for _, pkg := range j.Program.InitialPackages {
+		whitelist := map[string]bool{}
+		for _, code := range pkg.Config.HTTPStatusCodeWhitelist {
+			whitelist[code] = true
+		}
+		fn := func(node ast.Node) bool {
+			call, ok := node.(*ast.CallExpr)
+			if !ok {
+				return true
+			}
+
+			var arg int
+			switch CallNameAST(j, call) {
+			case "net/http.Error":
+				arg = 2
+			case "net/http.Redirect":
+				arg = 3
+			case "net/http.StatusText":
+				arg = 0
+			case "net/http.RedirectHandler":
+				arg = 1
+			default:
+				return true
+			}
+			lit, ok := call.Args[arg].(*ast.BasicLit)
+			if !ok {
+				return true
+			}
+			if whitelist[lit.Value] {
+				return true
+			}
+
+			n, err := strconv.Atoi(lit.Value)
+			if err != nil {
+				return true
+			}
+			s, ok := httpStatusCodes[n]
+			if !ok {
+				return true
+			}
+			j.Errorf(lit, "should use constant http.%s instead of numeric literal %d", s, n)
+			return true
+		}
+		for _, f := range pkg.Syntax {
+			ast.Inspect(f, fn)
+		}
+	}
+}
+
+func (c *Checker) CheckDefaultCaseOrder(j *lint.Job) {
+	fn := func(node ast.Node) bool {
+		stmt, ok := node.(*ast.SwitchStmt)
+		if !ok {
+			return true
+		}
+		list := stmt.Body.List
+		for i, c := range list {
+			if c.(*ast.CaseClause).List == nil && i != 0 && i != len(list)-1 {
+				j.Errorf(c, "default case should be first or last in switch statement")
+				break
+			}
+		}
+		return true
+	}
+	for _, f := range j.Program.Files {
+		ast.Inspect(f, fn)
+	}
+}
+
+func (c *Checker) CheckYodaConditions(j *lint.Job) {
+	fn := func(node ast.Node) bool {
+		cond, ok := node.(*ast.BinaryExpr)
+		if !ok {
+			return true
+		}
+		if cond.Op != token.EQL && cond.Op != token.NEQ {
+			return true
+		}
+		if _, ok := cond.X.(*ast.BasicLit); !ok {
+			return true
+		}
+		if _, ok := cond.Y.(*ast.BasicLit); ok {
+			// Don't flag lit == lit conditions, just in case
+			return true
+		}
+		j.Errorf(cond, "don't use Yoda conditions")
+		return true
+	}
+	for _, f := range j.Program.Files {
+		ast.Inspect(f, fn)
+	}
+}

vendor/honnef.co/go/tools/stylecheck/names.go

@@ -0,0 +1,263 @@
+// Copyright (c) 2013 The Go Authors. All rights reserved.
+// Copyright (c) 2018 Dominik Honnef. All rights reserved.
+
+package stylecheck
+
+import (
+	"go/ast"
+	"go/token"
+	"strings"
+	"unicode"
+
+	"honnef.co/go/tools/lint"
+	. "honnef.co/go/tools/lint/lintdsl"
+)
+
+// knownNameExceptions is a set of names that are known to be exempt from naming checks.
+// This is usually because they are constrained by having to match names in the
+// standard library.
+var knownNameExceptions = map[string]bool{
+	"LastInsertId": true, // must match database/sql
+	"kWh":          true,
+}
+
+func (c *Checker) CheckNames(j *lint.Job) {
+	// A large part of this function is copied from
+	// github.com/golang/lint, Copyright (c) 2013 The Go Authors,
+	// licensed under the BSD 3-clause license.
+
+	allCaps := func(s string) bool {
+		for _, r := range s {
+			if !((r >= 'A' && r <= 'Z') || (r >= '0' && r <= '9') || r == '_') {
+				return false
+			}
+		}
+		return true
+	}
+
+	check := func(id *ast.Ident, thing string, initialisms map[string]bool) {
+		if id.Name == "_" {
+			return
+		}
+		if knownNameExceptions[id.Name] {
+			return
+		}
+
+		// Handle two common styles from other languages that don't belong in Go.
+		if len(id.Name) >= 5 && allCaps(id.Name) && strings.Contains(id.Name, "_") {
+			j.Errorf(id, "should not use ALL_CAPS in Go names; use CamelCase instead")
+			return
+		}
+
+		should := lintName(id.Name, initialisms)
+		if id.Name == should {
+			return
+		}
+
+		if len(id.Name) > 2 && strings.Contains(id.Name[1:len(id.Name)-1], "_") {
+			j.Errorf(id, "should not use underscores in Go names; %s %s should be %s", thing, id.Name, should)
+			return
+		}
+		j.Errorf(id, "%s %s should be %s", thing, id.Name, should)
+	}
+	checkList := func(fl *ast.FieldList, thing string, initialisms map[string]bool) {
+		if fl == nil {
+			return
+		}
+		for _, f := range fl.List {
+			for _, id := range f.Names {
+				check(id, thing, initialisms)
+			}
+		}
+	}
+
+	for _, pkg := range j.Program.InitialPackages {
+		initialisms := make(map[string]bool, len(pkg.Config.Initialisms))
+		for _, word := range pkg.Config.Initialisms {
+			initialisms[word] = true
+		}
+		for _, f := range pkg.Syntax {
+			// Package names need slightly different handling than other names.
+			if !strings.HasSuffix(f.Name.Name, "_test") && strings.Contains(f.Name.Name, "_") {
+				j.Errorf(f, "should not use underscores in package names")
+			}
+			if strings.IndexFunc(f.Name.Name, unicode.IsUpper) != -1 {
+				j.Errorf(f, "should not use MixedCaps in package name; %s should be %s", f.Name.Name, strings.ToLower(f.Name.Name))
+			}
+
+			ast.Inspect(f, func(node ast.Node) bool {
+				switch v := node.(type) {
+				case *ast.AssignStmt:
+					if v.Tok != token.DEFINE {
+						return true
+					}
+					for _, exp := range v.Lhs {
+						if id, ok := exp.(*ast.Ident); ok {
+							check(id, "var", initialisms)
+						}
+					}
+				case *ast.FuncDecl:
+					// Functions with no body are defined elsewhere (in
+					// assembly, or via go:linkname). These are likely to
+					// be something very low level (such as the runtime),
+					// where our rules don't apply.
+					if v.Body == nil {
+						return true
+					}
+
+					if IsInTest(j, v) && (strings.HasPrefix(v.Name.Name, "Example") || strings.HasPrefix(v.Name.Name, "Test") || strings.HasPrefix(v.Name.Name, "Benchmark")) {
+						return true
+					}
+
+					thing := "func"
+					if v.Recv != nil {
+						thing = "method"
+					}
+
+					if !isTechnicallyExported(v) {
+						check(v.Name, thing, initialisms)
+					}
+
+					checkList(v.Type.Params, thing+" parameter", initialisms)
+					checkList(v.Type.Results, thing+" result", initialisms)
+				case *ast.GenDecl:
+					if v.Tok == token.IMPORT {
+						return true
+					}
+					var thing string
+					switch v.Tok {
+					case token.CONST:
+						thing = "const"
+					case token.TYPE:
+						thing = "type"
+					case token.VAR:
+						thing = "var"
+					}
+					for _, spec := range v.Specs {
+						switch s := spec.(type) {
+						case *ast.TypeSpec:
+							check(s.Name, thing, initialisms)
+						case *ast.ValueSpec:
+							for _, id := range s.Names {
+								check(id, thing, initialisms)
+							}
+						}
+					}
+				case *ast.InterfaceType:
+					// Do not check interface method names.
+					// They are often constrainted by the method names of concrete types.
+					for _, x := range v.Methods.List {
+						ft, ok := x.Type.(*ast.FuncType)
+						if !ok { // might be an embedded interface name
+							continue
+						}
+						checkList(ft.Params, "interface method parameter", initialisms)
+						checkList(ft.Results, "interface method result", initialisms)
+					}
+				case *ast.RangeStmt:
+					if v.Tok == token.ASSIGN {
+						return true
+					}
+					if id, ok := v.Key.(*ast.Ident); ok {
+						check(id, "range var", initialisms)
+					}
+					if id, ok := v.Value.(*ast.Ident); ok {
+						check(id, "range var", initialisms)
+					}
+				case *ast.StructType:
+					for _, f := range v.Fields.List {
+						for _, id := range f.Names {
+							check(id, "struct field", initialisms)
+						}
+					}
+				}
+				return true
+			})
+		}
+	}
+}
+
+// lintName returns a different name if it should be different.
+func lintName(name string, initialisms map[string]bool) (should string) {
+	// A large part of this function is copied from
+	// github.com/golang/lint, Copyright (c) 2013 The Go Authors,
+	// licensed under the BSD 3-clause license.
+
+	// Fast path for simple cases: "_" and all lowercase.
+	if name == "_" {
+		return name
+	}
+	if strings.IndexFunc(name, func(r rune) bool { return !unicode.IsLower(r) }) == -1 {
+		return name
+	}
+
+	// Split camelCase at any lower->upper transition, and split on underscores.
+	// Check each word for common initialisms.
+	runes := []rune(name)
+	w, i := 0, 0 // index of start of word, scan
+	for i+1 <= len(runes) {
+		eow := false // whether we hit the end of a word
+		if i+1 == len(runes) {
+			eow = true
+		} else if runes[i+1] == '_' && i+1 != len(runes)-1 {
+			// underscore; shift the remainder forward over any run of underscores
+			eow = true
+			n := 1
+			for i+n+1 < len(runes) && runes[i+n+1] == '_' {
+				n++
+			}
+
+			// Leave at most one underscore if the underscore is between two digits
+			if i+n+1 < len(runes) && unicode.IsDigit(runes[i]) && unicode.IsDigit(runes[i+n+1]) {
+				n--
+			}
+
+			copy(runes[i+1:], runes[i+n+1:])
+			runes = runes[:len(runes)-n]
+		} else if unicode.IsLower(runes[i]) && !unicode.IsLower(runes[i+1]) {
+			// lower->non-lower
+			eow = true
+		}
+		i++
+		if !eow {
+			continue
+		}
+
+		// [w,i) is a word.
+		word := string(runes[w:i])
+		if u := strings.ToUpper(word); initialisms[u] {
+			// Keep consistent case, which is lowercase only at the start.
+			if w == 0 && unicode.IsLower(runes[w]) {
+				u = strings.ToLower(u)
+			}
+			// All the common initialisms are ASCII,
+			// so we can replace the bytes exactly.
+			// TODO(dh): this won't be true once we allow custom initialisms
+			copy(runes[w:], []rune(u))
+		} else if w > 0 && strings.ToLower(word) == word {
+			// already all lowercase, and not the first word, so uppercase the first character.
+			runes[w] = unicode.ToUpper(runes[w])
+		}
+		w = i
+	}
+	return string(runes)
+}
+
+func isTechnicallyExported(f *ast.FuncDecl) bool {
+	if f.Recv != nil || f.Doc == nil {
+		return false
+	}
+
+	const export = "//export "
+	const linkname = "//go:linkname "
+	for _, c := range f.Doc.List {
+		if strings.HasPrefix(c.Text, export) && len(c.Text) == len(export)+len(f.Name.Name) && c.Text[len(export):] == f.Name.Name {
+			return true
+		}
+
+		if strings.HasPrefix(c.Text, linkname) {
+			return true
+		}
+	}
+	return false
+}

vendor/honnef.co/go/tools/unused/implements.go

@@ -0,0 +1,79 @@
+package unused
+
+import "go/types"
+
+// lookupMethod returns the index of and method with matching package and name, or (-1, nil).
+func lookupMethod(T *types.Interface, pkg *types.Package, name string) (int, *types.Func) {
+	if name != "_" {
+		for i := 0; i < T.NumMethods(); i++ {
+			m := T.Method(i)
+			if sameId(m, pkg, name) {
+				return i, m
+			}
+		}
+	}
+	return -1, nil
+}
+
+func sameId(obj types.Object, pkg *types.Package, name string) bool {
+	// spec:
+	// "Two identifiers are different if they are spelled differently,
+	// or if they appear in different packages and are not exported.
+	// Otherwise, they are the same."
+	if name != obj.Name() {
+		return false
+	}
+	// obj.Name == name
+	if obj.Exported() {
+		return true
+	}
+	// not exported, so packages must be the same (pkg == nil for
+	// fields in Universe scope; this can only happen for types
+	// introduced via Eval)
+	if pkg == nil || obj.Pkg() == nil {
+		return pkg == obj.Pkg()
+	}
+	// pkg != nil && obj.pkg != nil
+	return pkg.Path() == obj.Pkg().Path()
+}
+
+func (c *Checker) implements(V types.Type, T *types.Interface) bool {
+	// fast path for common case
+	if T.Empty() {
+		return true
+	}
+
+	if ityp, _ := V.Underlying().(*types.Interface); ityp != nil {
+		for i := 0; i < T.NumMethods(); i++ {
+			m := T.Method(i)
+			_, obj := lookupMethod(ityp, m.Pkg(), m.Name())
+			switch {
+			case obj == nil:
+				return false
+			case !types.Identical(obj.Type(), m.Type()):
+				return false
+			}
+		}
+		return true
+	}
+
+	// A concrete type implements T if it implements all methods of T.
+	ms := c.msCache.MethodSet(V)
+	for i := 0; i < T.NumMethods(); i++ {
+		m := T.Method(i)
+		sel := ms.Lookup(m.Pkg(), m.Name())
+		if sel == nil {
+			return false
+		}
+
+		f, _ := sel.Obj().(*types.Func)
+		if f == nil {
+			return false
+		}
+
+		if !types.Identical(f.Type(), m.Type()) {
+			return false
+		}
+	}
+	return true
+}

vendor/honnef.co/go/tools/unused/unused.go

@@ -12,7 +12,7 @@ import (
 	"honnef.co/go/tools/lint"
 	. "honnef.co/go/tools/lint/lintdsl"
 
-	"golang.org/x/tools/go/loader"
+	"golang.org/x/tools/go/packages"
 	"golang.org/x/tools/go/types/typeutil"
 )
 
@@ -31,9 +31,9 @@ func (*LintChecker) Name() string   { return "unused" }
 func (*LintChecker) Prefix() string { return "U" }
 
 func (l *LintChecker) Init(*lint.Program) {}
-func (l *LintChecker) Funcs() map[string]lint.Func {
+func (l *LintChecker) Checks() []lint.Check {
-	return map[string]lint.Func{
+	return []lint.Check{
-		"U1000": l.Lint,
+		{ID: "U1000", FilterGenerated: true, Fn: l.Lint},
 	}
 }
 
@@ -57,7 +57,7 @@ func typString(obj types.Object) string {
 }
 
 func (l *LintChecker) Lint(j *lint.Job) {
-	unused := l.c.Check(j.Program.Prog)
+	unused := l.c.Check(j.Program)
 	for _, u := range unused {
 		name := u.Obj.Name()
 		if sig, ok := u.Obj.Type().(*types.Signature); ok && sig.Recv() != nil {
@@ -158,7 +158,7 @@ type Checker struct {
 	graph *graph
 
 	msCache      typeutil.MethodSetCache
-	lprog        *loader.Program
+	prog         *lint.Program
 	topmostCache map[*types.Scope]*types.Scope
 	interfaces   []*types.Interface
 }
@@ -199,13 +199,13 @@ func (e Error) Error() string {
 	return fmt.Sprintf("errors in %d packages", len(e.Errors))
 }
 
-func (c *Checker) Check(lprog *loader.Program) []Unused {
+func (c *Checker) Check(prog *lint.Program) []Unused {
 	var unused []Unused
-	c.lprog = lprog
+	c.prog = prog
 	if c.WholeProgram {
 		c.findExportedInterfaces()
 	}
-	for _, pkg := range c.lprog.InitialPackages() {
+	for _, pkg := range prog.InitialPackages {
 		c.processDefs(pkg)
 		c.processUses(pkg)
 		c.processTypes(pkg)
@@ -231,6 +231,7 @@ func (c *Checker) Check(lprog *loader.Program) []Unused {
 	}
 	markNodesUsed(roots)
 	c.markNodesQuiet()
+	c.deduplicate()
 
 	if c.Debug != nil {
 		c.printDebugGraph(c.Debug)
@@ -246,8 +247,8 @@ func (c *Checker) Check(lprog *loader.Program) []Unused {
 		}
 		found := false
 		if !false {
-			for _, pkg := range c.lprog.InitialPackages() {
+			for _, pkg := range prog.InitialPackages {
-				if pkg.Pkg == obj.Pkg() {
+				if pkg.Types == obj.Pkg() {
 					found = true
 					break
 				}
@@ -257,25 +258,14 @@ func (c *Checker) Check(lprog *loader.Program) []Unused {
 			continue
 		}
 
-		pos := c.lprog.Fset.Position(obj.Pos())
+		pos := c.prog.Fset().Position(obj.Pos())
 		if pos.Filename == "" || filepath.Base(pos.Filename) == "C" {
 			continue
 		}
-		generated := false
+
-		for _, file := range c.lprog.Package(obj.Pkg().Path()).Files {
-			if c.lprog.Fset.Position(file.Pos()).Filename != pos.Filename {
-				continue
-			}
-			if len(file.Comments) > 0 {
-				generated = isGenerated(file.Comments[0].Text())
-			}
-			break
-		}
-		if generated {
-			continue
-		}
 		unused = append(unused, Unused{Obj: obj, Position: pos})
 	}
+
 	return unused
 }
 
@@ -325,17 +315,25 @@ func (c *Checker) useNoCopyFields(typ types.Type) {
 	}
 }
 
-func (c *Checker) useExportedFields(typ types.Type) {
+func (c *Checker) useExportedFields(typ types.Type, by types.Type) bool {
+	any := false
 	if st, ok := typ.Underlying().(*types.Struct); ok {
 		n := st.NumFields()
 		for i := 0; i < n; i++ {
 			field := st.Field(i)
-			if field.Exported() {
+			if field.Anonymous() {
+				if c.useExportedFields(field.Type(), typ) {
 					c.graph.markUsedBy(field, typ)
 				}
 			}
+			if field.Exported() {
+				c.graph.markUsedBy(field, by)
+				any = true
 			}
 		}
+	}
+	return any
+}
 
 func (c *Checker) useExportedMethods(typ types.Type) {
 	named, ok := typ.(*types.Named)
@@ -370,8 +368,8 @@ func (c *Checker) useExportedMethods(typ types.Type) {
 	}
 }
 
-func (c *Checker) processDefs(pkg *loader.PackageInfo) {
+func (c *Checker) processDefs(pkg *lint.Pkg) {
-	for _, obj := range pkg.Defs {
+	for _, obj := range pkg.TypesInfo.Defs {
 		if obj == nil {
 			continue
 		}
@@ -392,7 +390,7 @@ func (c *Checker) processDefs(pkg *loader.PackageInfo) {
 			// mark them used if an instance of the type was
 			// accessible via an interface value.
 			if !c.WholeProgram || c.ConsiderReflection {
-				c.useExportedFields(obj.Type())
+				c.useExportedFields(obj.Type(), obj.Type())
 			}
 
 			// TODO(dh): Traditionally we have not marked all exported
@@ -420,8 +418,8 @@ func (c *Checker) processDefs(pkg *loader.PackageInfo) {
 			if obj.Name() == "_" {
 				node := c.graph.getNode(obj)
 				node.quiet = true
-				scope := c.topmostScope(pkg.Pkg.Scope().Innermost(obj.Pos()), pkg.Pkg)
+				scope := c.topmostScope(pkg.Types.Scope().Innermost(obj.Pos()), pkg.Types)
-				if scope == pkg.Pkg.Scope() {
+				if scope == pkg.Types.Scope() {
 					c.graph.roots = append(c.graph.roots, node)
 				} else {
 					c.graph.markUsedBy(obj, scope)
@@ -471,15 +469,15 @@ func (c *Checker) processDefs(pkg *loader.PackageInfo) {
 	}
 }
 
-func (c *Checker) processUses(pkg *loader.PackageInfo) {
+func (c *Checker) processUses(pkg *lint.Pkg) {
-	for ident, usedObj := range pkg.Uses {
+	for ident, usedObj := range pkg.TypesInfo.Uses {
 		if _, ok := usedObj.(*types.PkgName); ok {
 			continue
 		}
 		pos := ident.Pos()
-		scope := pkg.Pkg.Scope().Innermost(pos)
+		scope := pkg.Types.Scope().Innermost(pos)
-		scope = c.topmostScope(scope, pkg.Pkg)
+		scope = c.topmostScope(scope, pkg.Types)
-		if scope != pkg.Pkg.Scope() {
+		if scope != pkg.Types.Scope() {
 			c.graph.markUsedBy(usedObj, scope)
 		}
 
@@ -492,17 +490,17 @@ func (c *Checker) processUses(pkg *loader.PackageInfo) {
 
 func (c *Checker) findExportedInterfaces() {
 	c.interfaces = []*types.Interface{types.Universe.Lookup("error").Type().(*types.Named).Underlying().(*types.Interface)}
-	var pkgs []*loader.PackageInfo
+	var pkgs []*packages.Package
 	if c.WholeProgram {
-		for _, pkg := range c.lprog.AllPackages {
+		pkgs = append(pkgs, c.prog.AllPackages...)
-			pkgs = append(pkgs, pkg)
-		}
 	} else {
-		pkgs = c.lprog.InitialPackages()
+		for _, pkg := range c.prog.InitialPackages {
+			pkgs = append(pkgs, pkg.Package)
+		}
 	}
 
 	for _, pkg := range pkgs {
-		for _, tv := range pkg.Types {
+		for _, tv := range pkg.TypesInfo.Types {
 			iface, ok := tv.Type.(*types.Interface)
 			if !ok {
 				continue
@@ -515,10 +513,10 @@ func (c *Checker) findExportedInterfaces() {
 	}
 }
 
-func (c *Checker) processTypes(pkg *loader.PackageInfo) {
+func (c *Checker) processTypes(pkg *lint.Pkg) {
 	named := map[*types.Named]*types.Pointer{}
 	var interfaces []*types.Interface
-	for _, tv := range pkg.Types {
+	for _, tv := range pkg.TypesInfo.Types {
 		if typ, ok := tv.Type.(interface {
 			Elem() types.Type
 		}); ok {
@@ -536,8 +534,8 @@ func (c *Checker) processTypes(pkg *loader.PackageInfo) {
 			}
 		case *types.Struct:
 			c.useNoCopyFields(obj)
-			if pkg.Pkg.Name() != "main" && !c.WholeProgram {
+			if pkg.Types.Name() != "main" && !c.WholeProgram {
-				c.useExportedFields(obj)
+				c.useExportedFields(obj, obj)
 			}
 		}
 	}
@@ -547,15 +545,30 @@ func (c *Checker) processTypes(pkg *loader.PackageInfo) {
 	//
 	// TODO(dh): For normal operations, that's the best we can do, as
 	// we have no idea what external users will do with our types. In
-	// whole-program mode, we could be more conservative, in two ways:
+	// whole-program mode, we could be more precise, in two ways:
 	// 1) Only consider interfaces if a type has been assigned to one
 	// 2) Use SSA and flow analysis and determine the exact set of
 	// interfaces that is relevant.
 	fn := func(iface *types.Interface) {
-		for obj, objPtr := range named {
+		for i := 0; i < iface.NumEmbeddeds(); i++ {
-			if !types.Implements(obj, iface) && !types.Implements(objPtr, iface) {
+			c.graph.markUsedBy(iface.Embedded(i), iface)
-				continue
 		}
+	namedLoop:
+		for obj, objPtr := range named {
+			switch obj.Underlying().(type) {
+			case *types.Interface:
+				// pointers to interfaces have no methods, only checking non-pointer
+				if !c.implements(obj, iface) {
+					continue namedLoop
+				}
+			default:
+				// pointer receivers include the method set of non-pointer receivers,
+				// only checking pointer
+				if !c.implements(objPtr, iface) {
+					continue namedLoop
+				}
+			}
+
 			ifaceMethods := make(map[string]struct{}, iface.NumMethods())
 			n := iface.NumMethods()
 			for i := 0; i < n; i++ {
@@ -591,23 +604,23 @@ func (c *Checker) processTypes(pkg *loader.PackageInfo) {
 	}
 }
 
-func (c *Checker) processSelections(pkg *loader.PackageInfo) {
+func (c *Checker) processSelections(pkg *lint.Pkg) {
 	fn := func(expr *ast.SelectorExpr, sel *types.Selection, offset int) {
-		scope := pkg.Pkg.Scope().Innermost(expr.Pos())
+		scope := pkg.Types.Scope().Innermost(expr.Pos())
-		c.graph.markUsedBy(expr.X, c.topmostScope(scope, pkg.Pkg))
+		c.graph.markUsedBy(sel, c.topmostScope(scope, pkg.Types))
-		c.graph.markUsedBy(sel.Obj(), expr.X)
+		c.graph.markUsedBy(sel.Obj(), sel)
 		if len(sel.Index()) > 1 {
 			typ := sel.Recv()
 			indices := sel.Index()
 			for _, idx := range indices[:len(indices)-offset] {
 				obj := getField(typ, idx)
 				typ = obj.Type()
-				c.graph.markUsedBy(obj, expr.X)
+				c.graph.markUsedBy(obj, sel)
 			}
 		}
 	}
 
-	for expr, sel := range pkg.Selections {
+	for expr, sel := range pkg.TypesInfo.Selections {
 		switch sel.Kind() {
 		case types.FieldVal:
 			fn(expr, sel, 0)
@@ -625,9 +638,9 @@ func dereferenceType(typ types.Type) types.Type {
 }
 
 // processConversion marks fields as used if they're part of a type conversion.
-func (c *Checker) processConversion(pkg *loader.PackageInfo, node ast.Node) {
+func (c *Checker) processConversion(pkg *lint.Pkg, node ast.Node) {
 	if node, ok := node.(*ast.CallExpr); ok {
-		callTyp := pkg.TypeOf(node.Fun)
+		callTyp := pkg.TypesInfo.TypeOf(node.Fun)
 		var typDst *types.Struct
 		var ok bool
 		switch typ := callTyp.(type) {
@@ -642,7 +655,7 @@ func (c *Checker) processConversion(pkg *loader.PackageInfo, node ast.Node) {
 			return
 		}
 
-		if typ, ok := pkg.TypeOf(node.Args[0]).(*types.Basic); ok && typ.Kind() == types.UnsafePointer {
+		if typ, ok := pkg.TypesInfo.TypeOf(node.Args[0]).(*types.Basic); ok && typ.Kind() == types.UnsafePointer {
 			// This is an unsafe conversion. Assume that all the
 			// fields are relevant (they are, because of memory
 			// layout)
@@ -653,7 +666,7 @@ func (c *Checker) processConversion(pkg *loader.PackageInfo, node ast.Node) {
 			return
 		}
 
-		typSrc, ok := dereferenceType(pkg.TypeOf(node.Args[0])).Underlying().(*types.Struct)
+		typSrc, ok := dereferenceType(pkg.TypesInfo.TypeOf(node.Args[0])).Underlying().(*types.Struct)
 		if !ok {
 			return
 		}
@@ -683,10 +696,10 @@ func (c *Checker) processConversion(pkg *loader.PackageInfo, node ast.Node) {
 
 // processCompositeLiteral marks fields as used if the struct is used
 // in a composite literal.
-func (c *Checker) processCompositeLiteral(pkg *loader.PackageInfo, node ast.Node) {
+func (c *Checker) processCompositeLiteral(pkg *lint.Pkg, node ast.Node) {
 	// XXX how does this actually work? wouldn't it match t{}?
 	if node, ok := node.(*ast.CompositeLit); ok {
-		typ := pkg.TypeOf(node)
+		typ := pkg.TypesInfo.TypeOf(node)
 		if _, ok := typ.(*types.Named); ok {
 			typ = typ.Underlying()
 		}
@@ -702,7 +715,7 @@ func (c *Checker) processCompositeLiteral(pkg *loader.PackageInfo, node ast.Node
 
 // processCgoExported marks functions as used if they're being
 // exported to cgo.
-func (c *Checker) processCgoExported(pkg *loader.PackageInfo, node ast.Node) {
+func (c *Checker) processCgoExported(pkg *lint.Pkg, node ast.Node) {
 	if node, ok := node.(*ast.FuncDecl); ok {
 		if node.Doc == nil {
 			return
@@ -711,13 +724,13 @@ func (c *Checker) processCgoExported(pkg *loader.PackageInfo, node ast.Node) {
 			if !strings.HasPrefix(cmt.Text, "//go:cgo_export_") {
 				return
 			}
-			obj := pkg.ObjectOf(node.Name)
+			obj := pkg.TypesInfo.ObjectOf(node.Name)
 			c.graph.roots = append(c.graph.roots, c.graph.getNode(obj))
 		}
 	}
 }
 
-func (c *Checker) processVariableDeclaration(pkg *loader.PackageInfo, node ast.Node) {
+func (c *Checker) processVariableDeclaration(pkg *lint.Pkg, node ast.Node) {
 	if decl, ok := node.(*ast.GenDecl); ok {
 		for _, spec := range decl.Specs {
 			spec, ok := spec.(*ast.ValueSpec)
@@ -731,11 +744,11 @@ func (c *Checker) processVariableDeclaration(pkg *loader.PackageInfo, node ast.N
 				value := spec.Values[i]
 				fn := func(node ast.Node) bool {
 					if node3, ok := node.(*ast.Ident); ok {
-						obj := pkg.ObjectOf(node3)
+						obj := pkg.TypesInfo.ObjectOf(node3)
 						if _, ok := obj.(*types.PkgName); ok {
 							return true
 						}
-						c.graph.markUsedBy(obj, pkg.ObjectOf(name))
+						c.graph.markUsedBy(obj, pkg.TypesInfo.ObjectOf(name))
 					}
 					return true
 				}
@@ -745,17 +758,17 @@ func (c *Checker) processVariableDeclaration(pkg *loader.PackageInfo, node ast.N
 	}
 }
 
-func (c *Checker) processArrayConstants(pkg *loader.PackageInfo, node ast.Node) {
+func (c *Checker) processArrayConstants(pkg *lint.Pkg, node ast.Node) {
 	if decl, ok := node.(*ast.ArrayType); ok {
 		ident, ok := decl.Len.(*ast.Ident)
 		if !ok {
 			return
 		}
-		c.graph.markUsedBy(pkg.ObjectOf(ident), pkg.TypeOf(decl))
+		c.graph.markUsedBy(pkg.TypesInfo.ObjectOf(ident), pkg.TypesInfo.TypeOf(decl))
 	}
 }
 
-func (c *Checker) processKnownReflectMethodCallers(pkg *loader.PackageInfo, node ast.Node) {
+func (c *Checker) processKnownReflectMethodCallers(pkg *lint.Pkg, node ast.Node) {
 	call, ok := node.(*ast.CallExpr)
 	if !ok {
 		return
@@ -764,12 +777,12 @@ func (c *Checker) processKnownReflectMethodCallers(pkg *loader.PackageInfo, node
 	if !ok {
 		return
 	}
-	if !IsType(pkg.TypeOf(sel.X), "*net/rpc.Server") {
+	if !IsType(pkg.TypesInfo.TypeOf(sel.X), "*net/rpc.Server") {
 		x, ok := sel.X.(*ast.Ident)
 		if !ok {
 			return
 		}
-		pkgname, ok := pkg.ObjectOf(x).(*types.PkgName)
+		pkgname, ok := pkg.TypesInfo.ObjectOf(x).(*types.PkgName)
 		if !ok {
 			return
 		}
@@ -791,14 +804,14 @@ func (c *Checker) processKnownReflectMethodCallers(pkg *loader.PackageInfo, node
 		}
 		arg = call.Args[1]
 	}
-	typ := pkg.TypeOf(arg)
+	typ := pkg.TypesInfo.TypeOf(arg)
 	ms := types.NewMethodSet(typ)
 	for i := 0; i < ms.Len(); i++ {
 		c.graph.markUsedBy(ms.At(i).Obj(), typ)
 	}
 }
 
-func (c *Checker) processAST(pkg *loader.PackageInfo) {
+func (c *Checker) processAST(pkg *lint.Pkg) {
 	fn := func(node ast.Node) bool {
 		c.processConversion(pkg, node)
 		c.processKnownReflectMethodCallers(pkg, node)
@@ -808,7 +821,7 @@ func (c *Checker) processAST(pkg *loader.PackageInfo) {
 		c.processArrayConstants(pkg, node)
 		return true
 	}
-	for _, file := range pkg.Files {
+	for _, file := range pkg.Syntax {
 		ast.Inspect(file, fn)
 	}
 }
@@ -914,7 +927,7 @@ func (c *Checker) isRoot(obj types.Object) bool {
 		return true
 	}
 	if obj.Exported() {
-		f := c.lprog.Fset.Position(obj.Pos()).Filename
+		f := c.prog.Fset().Position(obj.Pos()).Filename
 		if strings.HasSuffix(f, "_test.go") {
 			return strings.HasPrefix(obj.Name(), "Test") ||
 				strings.HasPrefix(obj.Name(), "Benchmark") ||
@@ -939,6 +952,33 @@ func markNodesUsed(nodes map[*graphNode]struct{}) {
 	}
 }
 
+// deduplicate merges objects based on their positions. This is done
+// to work around packages existing multiple times in go/packages.
+func (c *Checker) deduplicate() {
+	m := map[token.Position]struct{ used, quiet bool }{}
+	for _, node := range c.graph.nodes {
+		obj, ok := node.obj.(types.Object)
+		if !ok {
+			continue
+		}
+		pos := c.prog.Fset().Position(obj.Pos())
+		m[pos] = struct{ used, quiet bool }{
+			m[pos].used || node.used,
+			m[pos].quiet || node.quiet,
+		}
+	}
+
+	for _, node := range c.graph.nodes {
+		obj, ok := node.obj.(types.Object)
+		if !ok {
+			continue
+		}
+		pos := c.prog.Fset().Position(obj.Pos())
+		node.used = m[pos].used
+		node.quiet = m[pos].quiet
+	}
+}
+
 func (c *Checker) markNodesQuiet() {
 	for _, node := range c.graph.nodes {
 		if node.used {
@@ -1058,8 +1098,3 @@ func (c *Checker) printDebugGraph(w io.Writer) {
 	}
 	fmt.Fprintln(w, "}")
 }
-
-func isGenerated(comment string) bool {
-	return strings.Contains(comment, "Code generated by") ||
-		strings.Contains(comment, "DO NOT EDIT")
-}

vendor/modules.txt

@@ -1,6 +1,8 @@
 # code.vikunja.io/web v0.0.0-20190123142349-c30ef6073334
 code.vikunja.io/web
 code.vikunja.io/web/handler
+# github.com/BurntSushi/toml v0.3.1
+github.com/BurntSushi/toml
 # github.com/PuerkitoBio/purell v1.1.0
 github.com/PuerkitoBio/purell
 # github.com/PuerkitoBio/urlesc v0.0.0-20170810143723-de5bf2ad4578
@@ -77,9 +79,6 @@ github.com/jgautheron/goconst/cmd/goconst
 github.com/jgautheron/goconst
 # github.com/karalabe/xgo v0.0.0-20181007145344-72da7d1d3970
 github.com/karalabe/xgo
-# github.com/kisielk/gotool v1.0.0
-github.com/kisielk/gotool
-github.com/kisielk/gotool/internal/load
 # github.com/labstack/echo v3.3.5+incompatible
 github.com/labstack/echo
 github.com/labstack/echo/middleware
@@ -173,10 +172,14 @@ golang.org/x/text/unicode/bidi
 golang.org/x/tools/go/loader
 golang.org/x/tools/go/ast/astutil
 golang.org/x/tools/go/gcexportdata
+golang.org/x/tools/go/packages
 golang.org/x/tools/go/types/typeutil
 golang.org/x/tools/go/buildutil
 golang.org/x/tools/go/internal/cgo
 golang.org/x/tools/go/internal/gcimporter
+golang.org/x/tools/internal/gopathwalk
+golang.org/x/tools/internal/semver
+golang.org/x/tools/internal/fastwalk
 # google.golang.org/appengine v1.3.0
 google.golang.org/appengine/cloudsql
 # gopkg.in/alexcesaro/quotedprintable.v3 v3.0.0-20150716171945-2caba252f4dc
@@ -187,22 +190,25 @@ gopkg.in/gomail.v2
 gopkg.in/testfixtures.v2
 # gopkg.in/yaml.v2 v2.2.2
 gopkg.in/yaml.v2
-# honnef.co/go/tools v0.0.0-20180920025451-e3ad64cb4ed3
+# honnef.co/go/tools v0.0.0-20190215041234-466a0476246c
-honnef.co/go/tools/cmd/gosimple
 honnef.co/go/tools/cmd/staticcheck
-honnef.co/go/tools/cmd/unused
+honnef.co/go/tools/lint
 honnef.co/go/tools/lint/lintutil
 honnef.co/go/tools/simple
 honnef.co/go/tools/staticcheck
+honnef.co/go/tools/stylecheck
 honnef.co/go/tools/unused
-honnef.co/go/tools/lint
+honnef.co/go/tools/config
+honnef.co/go/tools/ssa
+honnef.co/go/tools/ssa/ssautil
+honnef.co/go/tools/lint/lintutil/format
 honnef.co/go/tools/version
+honnef.co/go/tools/arg
 honnef.co/go/tools/internal/sharedcheck
 honnef.co/go/tools/lint/lintdsl
 honnef.co/go/tools/deprecated
 honnef.co/go/tools/functions
-honnef.co/go/tools/ssa
+honnef.co/go/tools/ssautil
 honnef.co/go/tools/staticcheck/vrp
-honnef.co/go/tools/ssa/ssautil
 honnef.co/go/tools/callgraph
 honnef.co/go/tools/callgraph/static