instance method parse!

# File railties/lib/commands/plugin.rb, line 565
    def parse!(args)
      options.order!(args)
      unless @sources.empty?
        @sources.map!{ |uri| Repository.new(uri) }
      else
        @sources = Repositories.instance.all
      end
      if @remote
        @sources.map{|r| r.plugins}.flatten.each do |plugin| 
          if @local or !plugin.installed?
            puts plugin.to_s
          end
        end
      else
        cd "#{@base_command.environment.root}/vendor/plugins"
        Dir["*"].select{|p| File.directory?(p)}.each do |name| 
          puts name
        end
      end
    end