capistrano 3 pury ruby​​错误 - 不知道如何构建任务'：检查'

Question

我跟着capistrano in ruby script文档。

我的文件：

$ ls 
deploy.rb Gemfile Gemfile.lock 

Capistrano的版本：

$ cat Gemfile | grep -i cap 
    gem "capistrano", "3.2.1" 

红宝石版本：

$ bundle exec ruby --version 
ruby 2.1.2p95 (2014-05-08 revision 45877) [x86_64-linux-gnu] 

Ruby脚本：

require "capistrano/all" 
set :application, "my_app" 
set :deploy_to, "/home/my_app" 
set :tmp_dir, "/tmp" 
set :keep_releases, 5 
SSHKit::Backend::Netssh.configure { |ssh| ssh.ssh_options = { forward_agent: true, port: 22, user: "deploy_user", keys: "/ssh/key" } } 
server "host.example.com", roles: [:myrole] 
require "capistrano/setup" 
require "capistrano/deploy" 
cap_gem_dir = File.join Gem::Specification.find_by_name("capistrano").gem_dir, "lib", "capistrano", "tasks", "*.rake" 
Dir.glob(cap_gem_dir).each { |r| import r } 
Capistrano::Application.invoke("deploy") 

执行：

$ bundle exec ruby deploy.rb 
** Invoke deploy (first_time) 
** Execute deploy 
** Invoke deploy:starting (first_time) 
** Execute deploy:starting 
** Invoke deploy:check (first_time) 
** Execute deploy:check 
/var/lib/gems/2.1.0/gems/rake-10.3.2/lib/rake/task_manager.rb:62:in `[]': Don't know how to build task ':check' (RuntimeError) 
    from /var/lib/gems/2.1.0/gems/rake-10.3.2/lib/rake/task.rb:353:in `[]' 
    from /var/lib/gems/2.1.0/gems/capistrano-3.2.1/lib/capistrano/dsl.rb:15:in `invoke' 
    from /var/lib/gems/2.1.0/gems/capistrano-3.2.1/lib/capistrano/tasks/deploy.rake:36:in `block (2 levels) in <top (required)>' 
    from /var/lib/gems/2.1.0/gems/rake-10.3.2/lib/rake/task.rb:240:in `call' 
    from /var/lib/gems/2.1.0/gems/rake-10.3.2/lib/rake/task.rb:240:in `block in execute' 
    from /var/lib/gems/2.1.0/gems/rake-10.3.2/lib/rake/task.rb:235:in `each' 
    from /var/lib/gems/2.1.0/gems/rake-10.3.2/lib/rake/task.rb:235:in `execute' 
    from /var/lib/gems/2.1.0/gems/rake-10.3.2/lib/rake/task.rb:179:in `block in invoke_with_call_chain' 
    from /usr/lib/ruby/2.1.0/monitor.rb:211:in `mon_synchronize' 
    from /var/lib/gems/2.1.0/gems/rake-10.3.2/lib/rake/task.rb:172:in `invoke_with_call_chain' 
    from /var/lib/gems/2.1.0/gems/rake-10.3.2/lib/rake/task.rb:165:in `invoke' 
    from /var/lib/gems/2.1.0/gems/capistrano-3.2.1/lib/capistrano/dsl.rb:15:in `invoke' 
    from /var/lib/gems/2.1.0/gems/capistrano-3.2.1/lib/capistrano/tasks/deploy.rake:4:in `block (2 levels) in <top (required)>' 
    from /var/lib/gems/2.1.0/gems/rake-10.3.2/lib/rake/task.rb:240:in `call' 
    from /var/lib/gems/2.1.0/gems/rake-10.3.2/lib/rake/task.rb:240:in `block in execute' 
    from /var/lib/gems/2.1.0/gems/rake-10.3.2/lib/rake/task.rb:235:in `each' 
    from /var/lib/gems/2.1.0/gems/rake-10.3.2/lib/rake/task.rb:235:in `execute' 
    from /var/lib/gems/2.1.0/gems/rake-10.3.2/lib/rake/task.rb:179:in `block in invoke_with_call_chain' 
    from /usr/lib/ruby/2.1.0/monitor.rb:211:in `mon_synchronize' 
    from /var/lib/gems/2.1.0/gems/rake-10.3.2/lib/rake/task.rb:172:in `invoke_with_call_chain' 
    from /var/lib/gems/2.1.0/gems/rake-10.3.2/lib/rake/task.rb:165:in `invoke' 
    from /var/lib/gems/2.1.0/gems/capistrano-3.2.1/lib/capistrano/dsl.rb:15:in `invoke' 
    from /var/lib/gems/2.1.0/gems/capistrano-3.2.1/lib/capistrano/tasks/framework.rake:65:in `block (2 levels) in <top (required)>' 
    from /var/lib/gems/2.1.0/gems/capistrano-3.2.1/lib/capistrano/tasks/framework.rake:64:in `each' 
    from /var/lib/gems/2.1.0/gems/capistrano-3.2.1/lib/capistrano/tasks/framework.rake:64:in `block in <top (required)>' 
    from /var/lib/gems/2.1.0/gems/rake-10.3.2/lib/rake/task.rb:240:in `call' 
    from /var/lib/gems/2.1.0/gems/rake-10.3.2/lib/rake/task.rb:240:in `block in execute' 
    from /var/lib/gems/2.1.0/gems/rake-10.3.2/lib/rake/task.rb:235:in `each' 
    from /var/lib/gems/2.1.0/gems/rake-10.3.2/lib/rake/task.rb:235:in `execute' 
    from /var/lib/gems/2.1.0/gems/rake-10.3.2/lib/rake/task.rb:179:in `block in invoke_with_call_chain' 
    from /usr/lib/ruby/2.1.0/monitor.rb:211:in `mon_synchronize' 
    from /var/lib/gems/2.1.0/gems/rake-10.3.2/lib/rake/task.rb:172:in `invoke_with_call_chain' 
    from /var/lib/gems/2.1.0/gems/rake-10.3.2/lib/rake/task.rb:165:in `invoke' 
    from /var/lib/gems/2.1.0/gems/capistrano-3.2.1/lib/capistrano/dsl.rb:15:in `invoke' 
    from deploy.rb:13:in `<main>' 

虽然我不知道，好像是命名空间缺失 - Don't know how to build task ':check' - 在':check'应该是'deploy:check'。

更新：

似乎scm变量必须设置。

$ grep -nH scm /var/lib/gems/2.1.0/gems/capistrano-3.2.1/lib/capistrano/tasks/deploy.rake 
/var/lib/gems/2.1.0/gems/capistrano-3.2.1/lib/capistrano/tasks/deploy.rake:9: invoke "#{scm}:create_release" 
/var/lib/gems/2.1.0/gems/capistrano-3.2.1/lib/capistrano/tasks/deploy.rake:36: invoke "#{scm}:check" 
/var/lib/gems/2.1.0/gems/capistrano-3.2.1/lib/capistrano/tasks/deploy.rake:205: invoke "#{scm}:set_current_revision" 

加入set :scm, "deploy"让它继续下去，但后来失败

/var/lib/gems/2.1.0/gems/rake-10.3.2/lib/rake/task_manager.rb:62:in `[]': Don't know how to build task 'deploy:create_release' (RuntimeError) 

可以请你帮助我了解什么是错误，它可能如何固定？

谢谢。

Answer 1

我认为你必须将scm选项设置为:git。所以这个：set :scm, :git。至少这是默认Capistrano itself has。

另外，为什么你没有设置stage选项，如capistrano pure ruby guide中所述？

该页面明确指出stage选项需要在加载setup和deploy文件之前sed。

请注意，由于在加载安装和部署之前需要设置阶段，所以需求订单很重要。

除此之外，你在这里做了一个非常新颖的工作（你是我知道的第一个这样做）。