instance method parse!

# File railties/lib/rails/commands/plugin.rb, line 406
    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