parse!

# File railties/lib/commands/plugin.rb, line 688
    def parse!(args)
      options.parse!(args)
      environment = @base_command.environment
      install_method = determine_install_method
      puts "Plugins will be installed using #{install_method}" if $verbose
      args.each do |name| 
        if name =~ /\// then
          ::Plugin.new(name).install(install_method)
        else
          plugin = Repositories.instance.find_plugin(name)
          unless plugin.nil?
            plugin.install(install_method)
          else
            puts "Plugin not found: #{name}"
            exit 1
          end
        end
      end
    end