我有这个Capistrano任务：
namespace :deploy do
task :precompile,:role => :app do
run "cd #{release_path}/ && RAILS_ENV=staging bundle exec rake assets:precompile --trace"
end
end
after "deploy:finalize_update","deploy:precompile"
我知道有负载’部署/资产’,但我正在试图了解这里发生了什么.
我正在部署到Amazon EC2 m1.small实例,该实例显然持续50％的cpu窃取时间,并通过top验证.
这导致编译资产的时间增加,但看看这个：
[23.21.xxx.xx] rvm_path=$HOME/.rvm/ $HOME/.rvm/bin/rvm-shell 'ruby-1.9.3-p125' -c 'cd /home/ubuntu/apps/myapp-rails/releases/20120227020245/ && RAILS_ENV=staging bundle exec rake assets:precompile --trace'
** [out :: 23.21.xxx.xx] ** Invoke assets:precompile (first_time)
** [out :: 23.21.xxx.xx] ** Execute assets:precompile
** [out :: 23.21.xxx.xx] /home/ubuntu/.rvm/rubies/ruby-1.9.3-p125/bin/ruby /home/ubuntu/apps/myapp-rails/shared/bundle/ruby/1.9.1/bin/rake assets:precompile:all RAILS_ENV=staging RAILS_GROUPS=assets --trace
** [out :: 23.21.xxx.xx] ** Invoke assets:precompile:all (first_time)
** [out :: 23.21.xxx.xx] ** Execute assets:precompile:all
** [out :: 23.21.xxx.xx] ** Invoke assets:precompile:primary (first_time)
** [out :: 23.21.xxx.xx] ** Invoke assets:environment (first_time)
** [out :: 23.21.xxx.xx] ** Execute assets:environment
** [out :: 23.21.xxx.xx] ** Invoke environment (first_time)
** [out :: 23.21.xxx.xx] ** Execute environment
** [out :: 23.21.xxx.xx] ** Invoke tmp:cache:clear (first_time)
** [out :: 23.21.xxx.xx] ** Execute tmp:cache:clear
** [out :: 23.21.xxx.xx] ** Execute assets:precompile:primary
** [out :: 23.21.xxx.xx] ** Invoke assets:precompile:nondigest (first_time)
** [out :: 23.21.xxx.xx] ** Invoke assets:environment (first_time)
** [out :: 23.21.xxx.xx] ** Execute assets:environment
** [out :: 23.21.xxx.xx] ** Invoke environment (first_time)
** [out :: 23.21.xxx.xx] ** Execute environment
** [out :: 23.21.xxx.xx] ** Invoke tmp:cache:clear (first_time)
** [out :: 23.21.xxx.xx] ** Execute tmp:cache:clear
** [out :: 23.21.xxx.xx] ** Execute assets:precompile:nondigest
command finished in 958131ms
除了出于某种原因花费在预编译资产上的大量时间之外,我可以说它正在编译它们两次.为什么？
我正在使用Rails 3.2.1.
有人可以提供一些关于这里发生了什么的见解吗？有意吗？
staging.rb # Compress JavaScripts and CSS config.assets.compress = true # Don't fallback to assets pipeline if a precompiled asset is missed config.assets.compile = false # Generate digests for assets URLs config.assets.digest = true
解决方法
load’sloy / assets’会在部署的相应部分自动为您预编译资产,因此您无需定义预编译任务.您可以在“deploy：finalize_update”,“deploy：precompile”之后删除预编译任务.
https://github.com/capistrano/capistrano/blob/master/lib/capistrano/recipes/deploy/assets.rb
编辑：默认情况下,当您将摘要设置为true时,Rails将创建指纹文件和非指纹文件.它实际上并没有两次运行整个预编译任务,它只是为每种情况运行一个任务.
如果要完全禁用生成非指纹文件,则可以覆盖资产：预编译：所有任务.
Rake::Task['assets:precompile:all'].clear
namespace :assets do
namespace :precompile do
task :all do
Rake::Task['assets:precompile:primary'].invoke
# ruby_rake_task("assets:precompile:nondigest",false) if Rails.application.config.assets.digest
end
end
end
注释掉的行是第66行：
https://github.com/rails/rails/blob/master/actionpack/lib/sprockets/assets.rake