106 lines
2.4 KiB
Go
106 lines
2.4 KiB
Go
|
// Package vfspath implements utility routines for manipulating virtual file system paths.
|
||
|
|
package vfspath
|
||
|
|
|
||
|
|
import (
|
||
|
|
"net/http"
|
||
|
|
"os"
|
||
|
|
"path"
|
||
|
|
"sort"
|
||
|
|
"strings"
|
||
|
|
|
||
|
|
"github.com/shurcooL/httpfs/vfsutil"
|
||
|
|
)
|
||
|
|
|
||
|
|
const separator = "/"
|
||
|
|
|
||
|
|
// Glob returns the names of all files matching pattern or nil
|
||
|
|
// if there is no matching file. The syntax of patterns is the same
|
||
|
|
// as in path.Match. The pattern may describe hierarchical names such as
|
||
|
|
// /usr/*/bin/ed.
|
||
|
|
//
|
||
|
|
// Glob ignores file system errors such as I/O errors reading directories.
|
||
|
|
// The only possible returned error is ErrBadPattern, when pattern
|
||
|
|
// is malformed.
|
||
|
|
func Glob(fs http.FileSystem, pattern string) (matches []string, err error) {
|
||
|
|
if !hasMeta(pattern) {
|
||
|
|
if _, err = vfsutil.Stat(fs, pattern); err != nil {
|
||
|
|
return nil, nil
|
||
|
|
}
|
||
|
|
return []string{pattern}, nil
|
||
|
|
}
|
||
|
|
|
||
|
|
dir, file := path.Split(pattern)
|
||
|
|
switch dir {
|
||
|
|
case "":
|
||
|
|
dir = "."
|
||
|
|
case string(separator):
|
||
|
|
// nothing
|
||
|
|
default:
|
||
|
|
dir = dir[0 : len(dir)-1] // chop off trailing separator
|
||
|
|
}
|
||
|
|
|
||
|
|
if !hasMeta(dir) {
|
||
|
|
return glob(fs, dir, file, nil)
|
||
|
|
}
|
||
|
|
|
||
|
|
var m []string
|
||
|
|
m, err = Glob(fs, dir)
|
||
|
|
if err != nil {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
for _, d := range m {
|
||
|
|
matches, err = glob(fs, d, file, matches)
|
||
|
|
if err != nil {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return
|
||
|
|
}
|
||
|
|
|
||
|
|
// glob searches for files matching pattern in the directory dir
|
||
|
|
// and appends them to matches. If the directory cannot be
|
||
|
|
// opened, it returns the existing matches. New matches are
|
||
|
|
// added in lexicographical order.
|
||
|
|
func glob(fs http.FileSystem, dir, pattern string, matches []string) (m []string, e error) {
|
||
|
|
m = matches
|
||
|
|
fi, err := vfsutil.Stat(fs, dir)
|
||
|
|
if err != nil {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
if !fi.IsDir() {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
fis, err := vfsutil.ReadDir(fs, dir)
|
||
|
|
if err != nil {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
|
||
|
|
sort.Sort(byName(fis))
|
||
|
|
|
||
|
|
for _, fi := range fis {
|
||
|
|
n := fi.Name()
|
||
|
|
matched, err := path.Match(path.Clean(pattern), n)
|
||
|
|
if err != nil {
|
||
|
|
return m, err
|
||
|
|
}
|
||
|
|
if matched {
|
||
|
|
m = append(m, path.Join(dir, n))
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return
|
||
|
|
}
|
||
|
|
|
||
|
|
// hasMeta reports whether path contains any of the magic characters
|
||
|
|
// recognized by Match.
|
||
|
|
func hasMeta(path string) bool {
|
||
|
|
// TODO(niemeyer): Should other magic characters be added here?
|
||
|
|
return strings.ContainsAny(path, "*?[")
|
||
|
|
}
|
||
|
|
|
||
|
|
// byName implements sort.Interface.
|
||
|
|
type byName []os.FileInfo
|
||
|
|
|
||
|
|
func (f byName) Len() int { return len(f) }
|
||
|
|
func (f byName) Less(i, j int) bool { return f[i].Name() < f[j].Name() }
|
||
|
|
func (f byName) Swap(i, j int) { f[i], f[j] = f[j], f[i] }
|