如何用'exception`将capistrano 2任务改写为capistarano 3

Question

我想用capistrano 3改写一个capistrano 2任务。

此代码来自Railscast 335

  %w[start stop restart].each do |command|
    desc "#{command} unicorn server"
    task command, roles: :app, except: {no_release: true} do
      run "/etc/init.d/unicorn_#{application} #{command}"
    end
  end  

我可以根据这样的capistrano文件重写。

  %w[start stop restart].each do |command|
     desc "#{command} unicorn server"
     task command do
        on roles(:app) do
          run "/etc/init.d/unicorn_#{application} #{command}"
        end
     end
  end

但我不知道如何重写except: {no_release: true}部分，我找不到有关它的文档。

我怎样才能改写它？

Answer 1

  %w[start stop restart].each do |command|
     desc "#{command} unicorn server"
     task command do
        on roles(:app), reject: lambda { |h| h.properties.no_release } do
          run "/etc/init.d/unicorn_#{application} #{command}"
        end
     end
  end

更多信息：http://capistranorb.com/2013/06/01/release-announcement.html