我经常遇到Capistrano部署和i18n-js的问题。 基本上，我有一个rails 3.2.16应用程序，它使用i18n-js gem（版本2.1.2）内部化为2种语言（英语和日语）。当我部署应用程序时，该过程如下所示（我需要运行几个rake任务）：
bundle exec rake i18n:js:export
bundle exec rake db:migrate
bundle exec rake assets:precompile
我在登台服务器上部署，这是Capistrano文件（capistrano gem版本是2.15.5）：
server "ec2-bla-bla.compute-1.amazonaws.com", :app, :web, :db
set :branch, "staging"
set :rails_env, "staging"
after "deploy", "deploy:cleanup"
before "deploy:assets:precompile", "deploy:i18n_js_export"
namespace :deploy do
desc "I18n export"
task :i18n_js_export do
run "ps aux | grep unicorn | grep -v grep | awk '{system(\"kill -9 \"$2)}'; true"
run "ps aux | grep sidekiq | grep -v grep | awk '{system(\"sudo kill -TERM \"$2)}'; true"
run "export RAILS_ENV=#{rails_env} && cd #{current_path} && bundle exec rake i18n:js:export"
run "export RAILS_ENV=#{rails_env} && cd #{current_path} && bundle exec rake db:migrate"
end
task :unicorn_restart do
run "sudo service unicorn_myapp restart; true"
end
end
namespace :deploy do
desc "Recreate symlink"
task :resymlink, :roles => :app do
run "rm -f #{current_path} && ln -s #{release_path} #{current_path}"
end
end
after "deploy:assets:symlink", "deploy:resymlink"
after "deploy:assets:precompile", "deploy:unicorn_restart"
有点好笑，有时脚本运行正常，但有时我会收到以下错误：
* executing "export RAILS_ENV=staging && cd /home/ubuntu/apps/myapp/current && bundle exec rake i18n:js:export"
servers: ["staging.compute-a.aws.amazon.com"]
[staging.compute-a.aws.amazon.com] executing command
** [out :: staging.compute-a.aws.amazon.com] [deprecated] I18n.enforce_available_locales will default to true in the future. If you really want to skip validation of your locale you can set I18n.enforce_available_locales = false to avoid this message.
** [out :: staging.compute-a.aws.amazon.com]
** [out :: staging.compute-a.aws.amazon.com] rake aborted!
** [out :: staging.compute-a.aws.amazon.com] Permission denied - /home/ubuntu/apps/myapp/releases/20140407170608/tmp/i18n-js.cache
** [out :: staging.compute-a.aws.amazon.com] /home/ubuntu/apps/myapp/shared/bundle/ruby/1.9.1/gems/i18n-js-2.1.2/lib/i18n-js/engine.rb:52:in `initialize'
** [out :: staging.compute-a.aws.amazon.com] /home/ubuntu/apps/myapp/shared/bundle/ruby/1.9.1/gems/i18n-js-2.1.2/lib/i18n-js/engine.rb:52:in `open'
** [out :: staging.compute-a.aws.amazon.com] /home/ubuntu/apps/myapp/shared/bundle/ruby/1.9.1/gems/i18n-js-2.1.2/lib/i18n-js/engine.rb:52:in `write_hash!'
** [out :: staging.compute-a.aws.amazon.com] /home/ubuntu/apps/myapp/shared/bundle/ruby/1.9.1/gems/i18n-js-2.1.2/lib/i18n-js/engine.rb:45:in `write_hash_if_changed'
** [out :: staging.compute-a.aws.amazon.com] /home/ubuntu/apps/myapp/shared/bundle/ruby/1.9.1/gems/i18n-js-2.1.2/lib/i18n-js/engine.rb:33:in `block in <class:Engine>'
** [out :: staging.compute-a.aws.amazon.com] /home/ubuntu/apps/myapp/shared/bundle/ruby/1.9.1/gems/activesupport-3.2.16/lib/active_support/callbacks.rb:440:in `_run__3095975217415606208__prepare__1788827297758520059__callbacks'
** [out :: staging.compute-a.aws.amazon.com] /home/ubuntu/apps/myapp/shared/bundle/ruby/1.9.1/gems/activesupport-3.2.16/lib/active_support/callbacks.rb:405:in `__run_callback'
** [out :: staging.compute-a.aws.amazon.com] /home/ubuntu/apps/myapp/shared/bundle/ruby/1.9.1/gems/activesupport-3.2.16/lib/active_support/callbacks.rb:385:in `_run_prepare_callbacks'
** [out :: staging.compute-a.aws.amazon.com] /home/ubuntu/apps/myapp/shared/bundle/ruby/1.9.1/gems/activesupport-3.2.16/lib/active_support/callbacks.rb:81:in `run_callbacks'
** [out :: staging.compute-a.aws.amazon.com] /home/ubuntu/apps/myapp/shared/bundle/ruby/1.9.1/gems/actionpack-3.2.16/lib/action_dispatch/middleware/reloader.rb:74:in `prepare!'
** [out :: staging.compute-a.aws.amazon.com] /home/ubuntu/apps/myapp/shared/bundle/ruby/1.9.1/gems/actionpack-3.2.16/lib/action_dispatch/middleware/reloader.rb:48:in `prepare!'
** [out :: staging.compute-a.aws.amazon.com] /home/ubuntu/apps/myapp/shared/bundle/ruby/1.9.1/gems/railties-3.2.16/lib/rails/application/finisher.rb:47:in `block in <module:Finisher>'
** [out :: staging.compute-a.aws.amazon.com] /home/ubuntu/apps/myapp/shared/bundle/ruby/1.9.1/gems/railties-3.2.16/lib/rails/initializable.rb:30:in `instance_exec'
** [out :: staging.compute-a.aws.amazon.com] /home/ubuntu/apps/myapp/shared/bundle/ruby/1.9.1/gems/railties-3.2.16/lib/rails/initializable.rb:30:in `run'
** [out :: staging.compute-a.aws.amazon.com] /home/ubuntu/apps/myapp/shared/bundle/ruby/1.9.1/gems/railties-3.2.16/lib/rails/initializable.rb:55:in `block in run_initializers'
** [out :: staging.compute-a.aws.amazon.com] /home/ubuntu/apps/myapp/shared/bundle/ruby/1.9.1/gems/railti
** [out :: staging.compute-a.aws.amazon.com] es-3.2.16/lib/rails/initializable.rb:54:in `each'
** [out :: staging.compute-a.aws.amazon.com] /home/ubuntu/apps/myapp/shared/bundle/ruby/1.9.1/gems/railties-3.2.16/lib/rails/initializable.rb:54:in `run_initializers'
** [out :: staging.compute-a.aws.amazon.com] /home/ubuntu/apps/myapp/shared/bundle/ruby/1.9.1/gems/railties-3.2.16/lib/rails/application.rb:136:in `initialize!'
** [out :: staging.compute-a.aws.amazon.com] /home/ubuntu/apps/myapp/shared/bundle/ruby/1.9.1/gems/railties-3.2.16/lib/rails/railtie/configurable.rb:30:in `method_missing'
** [out :: staging.compute-a.aws.amazon.com] /home/ubuntu/apps/myapp/releases/20140407170608/config/environment.rb:8:in `<top (required)>'
** [out :: staging.compute-a.aws.amazon.com] /home/ubuntu/apps/myapp/shared/bundle/ruby/1.9.1/gems/activesupport-3.2.16/lib/active_support/dependencies.rb:251:in `require'
** [out :: staging.compute-a.aws.amazon.com] /home/ubuntu/apps/myapp/shared/bundle/ruby/1.9.1/gems/activesupport-3.2.16/lib/active_support/dependencies.rb:251:in `block in require'
** [out :: staging.compute-a.aws.amazon.com] /home/ubuntu/apps/myapp/shared/bundle/ruby/1.9.1/gems/activesupport-3.2.16/lib/active_support/dependencies.rb:236:in `load_dependency'
** [out :: staging.compute-a.aws.amazon.com] /home/ubuntu/apps/myapp/shared/bundle/ruby/1.9.1/gems/activesupport-3.2.16/lib/active_support/dependencies.rb:251:in `require'
** [out :: staging.compute-a.aws.amazon.com] /home/ubuntu/apps/myapp/shared/bundle/ruby/1.9.1/gems/railties-3.2.16/lib/rails/application.rb:103:in `require_environment!'
** [out :: staging.compute-a.aws.amazon.com] /home/ubuntu/apps/myapp/shared/bundle/ruby/1.9.1/gems/railties-3.2.16/lib/rails/application.rb:305:in `block (2 levels) in initialize_tasks'
** [out :: staging.compute-a.aws.amazon.com] /home/ubuntu/apps/myapp/releases/20140407170608/config/application.rb:87:in `invoke'
** [out :: staging.compute-a.aws.amazon.com] Tasks: TOP => i18n:js:export => environment
** [out :: staging.compute-a.aws.amazon.com] (See full trace by running task with --trace)
command finished in 90439ms
似乎i18n-js.cache文件有时被创建为写保护。
一些事情： 1. i18n-js.cache不仅在i18n：js：export中创建，而且在以下任何命令中创建（db：migrate，assets：precompile） 2.我尝试在rake调用之间更改权限，但它不起作用，因为它似乎是在rake调用中创建的，并且在同一rake调用期间拒绝访问：
run "sudo chown ubuntu #{current_path}/tmp/i18n-js.cache"
非常感谢任何帮助。现在我必须手动查看它何时出现，所以我可以手动更改权限，这有点乏味