upload rsync with capistrano

gistfile1.rb

module ::Capistrano
  class Configuration
    module Actions
      module Rsync
        def self.included(base)
          base.send(:alias_method, :old_upload, :upload)
          base.send(:alias_method, :upload,     :new_upload)
        end

        def new_upload(from, to)
          servers = find_servers_for_task(current_task, {})
          raise Capistrano::NoMatchingServersError if servers.empty?
          servers.each do |server|
            begin
              u = server.user || exists?(:user) ? fetch(:user) : nil
              dest = "#{server.host}:#{to}"
              if not u.nil?
                dest = "#{u}@#{dest}"
              end
              system_or_exit(%Q[rsync --progress -avz #{from} #{dest}])
            rescue => error
              raise unless current_task && current_task.continue_on_error?
            end
          end
        end

        private
        def system_or_exit(cmd, stdout = nil)
          puts "$ #{cmd}"
          cmd += " >#{stdout}" if stdout
          system(cmd) or raise "command failed. "
        end
      end
    end
  end
end

Capistrano::Configuration.send(:include, Actions::Rsync)