foodsoft/lib/capistrano/tasks/plugins.cap

# Capistrano tasks for enabling/disabling foodsoft plugins in the Gemfile
#
# Please note that the foodsoft plugins should be present already in the
# Gemfile, either commented out or not.
#
# To automatically enable the desired plugins on deployment, create the
# file `config/plugins.yml` in the shared directory, containing the
# key `enabled` with a list of enabled plugin names (without foodsoft_).
# Then add to your `config/deploy.rb`:
#   before 'bundler:install', 'enable_plugins:auto'

desc 'Enable only the foodsoft plugins, cap enable_plugins PLUGINS=wiki,messages'
task :enable_plugins do
  on roles(:app), in: :groups do
    unless env['PLUGINS'].nil?
      enable_foodsoft_plugins(ENV['PLUGINS'].split(/,\s*/))
    else
      raise 'You need to set the PLUGINS environment variable to enable specific plugins'
    end
  end
end

namespace :enable_plugins do

  desc 'Enable the foodsoft plugins specified in shared/config/plugins.yml, if it exists (key `enabled`).'
  task 'auto' do
    on roles(:app), in: :groups do
      text = capture :cat, shared_path.join('config/plugins.yml'), '||true'
      if text
        plugins = YAML.load(text)
        enable_foodsoft_plugins(plugins['enabled']) if plugins && !plugins['enabled'].nil?
      end
    end
  end

end

# need to run in role
def enable_foodsoft_plugins(plugins)
  gemfile = capture :cat, release_path.join('Gemfile')
  gemfile.gsub! /^\s*(#)?\s*(gem\s+(['"])foodsoft_(.*?)\3)/ do |c|
    (plugins.index($4) ? '' : '#') + $2
  end
  upload! StringIO.new(gemfile), release_path.join('Gemfile')
  # since we updated the Gemfile, we need to run bundler in non-deployment mode
  new_bundle_flags = fetch(:bundle_flags).split(/\s+/)
  new_bundle_flags.reject! {|o| o=='--deployment'}
  new_bundle_flags << '--no-deployment'
  set :bundle_flags, new_bundle_flags.join(' ')
end