add_source_option (Gem::LocalRemoteOptions)

    # File lib/rubygems/local_remote_options.rb, line 72
      def add_source_option
        accept_uri_http

        add_option("Local/Remote""Local/Remote", '--source URL', URI::HTTP,
                   'Use URL as the remote source for gems') do |value, options|
          if options[:added_source] then
            Gem.sources << value
          else
            options[:added_source] = true
            Gem.sources.replace [value]
          end
        end
      end