要求 Capistrano 在链接（符号链接）文件之前运行任务

Question

我一直在尝试编写一个 capistrano 脚本，我将配置文件从我的应用程序目录 (support/config/#{rails_env}) 复制到 capistrano 中的 shared directory(shared/config)

rails_env => 'staging'

这样当 capistrano 运行 first time 时，它会将文件从 support/config/#{rails_env} 目录复制到 shared/config 目录，但它需要在 capistrano 链接文件之前运行它，即在此之前完成

set :linked_files, %w{config/api_config.yml}

这样链接的任务不会失败（因为它要求任务需要文件存在于共享目录中）

这是我的 Capfile（没什么特别的，因为大部分东西都是我的 capistrno 完成的）

set :application, 'custom-api'
set :repo_url, ''

# ask :branch, proc { `git rev-parse --abbrev-ref HEAD`.chomp }
set :rails_env, 'staging' 
set :deploy_to, '/var/apps/staging/custom-api'
set :scm, :git

set :format, :pretty
set :log_level, :debug
set :rvm_type, :user   # Defaults to: :auto
set :rvm_ruby_version, 'ruby-1.9.3@484@custom-api'  
#set :rvm_custom_path, '~/.myveryownrvm'  # only needed if not detected
# set :pty, true
set :linked_files, %w{config/mongoid.yml config/api_config.yml}
set :linked_dirs, %w{bin log tmp/pids tmp/cache tmp/sockets vendor/bundle public/system}

#set :default_env, { path: "$HOME/.rvm/#{}:$PATH" }
set :keep_releases, 5
#SSHKit.config.command_map[:cp_r]  = "cp -r"

## Need to run before the file is linked
#before 'deploy:[task_name]' , 'deploy:copy_files'

namespace :deploy do
  desc 'Copy files from application to shared directory'
  ## copy the files to the shared directories
  task :copy_files do 
    on roles(:app) do
      execute :cp ,'-r',release_path.join('support/config'),shared_path
    end  
  end

  desc 'Restart application'
  task :restart do
    on roles(:app), in: :sequence, wait: 5 do
      # Your restart mechanism here, for example:
      execute :touch, release_path.join('tmp/restart.txt')
    end
  end

  after :restart, :clear_cache do
    on roles(:web), in: :groups, limit: 3, wait: 10 do
      # Here we can do anything such as:
      # within release_path do
      #   execute :rake, 'cache:clear'
      # end
    end
  end
  after :finishing, 'deploy:cleanup'
end

我只需要做一些类似的事情

before 'deploy:[task_name]' , 'deploy:copy_files'

补充说明：使用 Capistrno 3.0.1

Answer 1

根据他们的documentation，该任务称为deploy:symlink:shared。我会像你的例子一样装饰它：

before 'deploy:symlink:shared', 'deploy:copy_files'

请注意，当您装饰实际任务时，每次调用该任务时都会调用它。