instance method parse!

# File railties/lib/rails/commands/plugin.rb, line 407
      def parse!(args)
        options.parse!(args)
        if args.blank?
          puts options
          exit 1
        end
        environment = @base_command.environment
        install_method = determine_install_method
        puts "Plugins will be installed using #{install_method}" if $verbose
        args.each do |name|
          ::Plugin.find(name).install(install_method, @options)
        end
      rescue StandardError => e
        puts "Plugin not found: #{args.inspect}"
        puts e.inspect if $verbose
        exit 1
      end