instance method parse!

# File railties/lib/commands/plugin.rb, line 698
    def parse!(args)
      options.parse!(args)
      args = ['http://wiki.rubyonrails.org/rails/pages/Plugins'] if args.empty?
      args.each do |uri|
        scrape(uri) do |repo_uri|
          catch(:next_uri) do
            if @prompt
              begin
                $stdout.print "Add #{repo_uri}? [Y/n] "
                throw :next_uri if $stdin.gets !~ /^y?$/i
              rescue Interrupt
                $stdout.puts
                exit 1
              end
            elsif @list
              puts repo_uri
              throw :next_uri
            end
            Repositories.instance.add(repo_uri)
            puts "discovered: #{repo_uri}" if $verbose or !@prompt
          end
        end
      end
      Repositories.instance.save
    end