自定义rake任务，用于在本地预编译资产

Question

我需要在我的本地机器上预编译资产，并在使用capistrano进行部署后预编译资产。

我已添加到development.rb:

config.assets.prefix = "/dev-assets"

也，我已经添加到application.rb

config.assets.initialize_on_precompile = false

而不是手动执行rake assets:precompile，我想让这个过程从capistrano文件自动化，干净的资产，上传…我已经尝试过这个自定义任务

namespace :assets do
    task :precompile, :roles => :web, :except => { :no_release => true } do
      from = source.next_revision(current_revision)
      if capture("cd #{latest_release} && #{source.local.log(from)} vendor/assets/ app/assets/ | wc -l").to_i > 0
        run_locally "bundle exec rake assets:precompile"
        run_locally "rsync -zvrh --progress -e 'ssh -i #{ssh_options[:keys][0]}' public/assets #{user}{server}:#{shared_path}"
        puts "cleaning up locally compiled assets"
        run_locally "bundle exec rake assets:clean"
      else
        puts "Skipping asset pre-compilation because there were no asset changes"
      end
    end
  end

但是我得到一个错误:

/config/deploy.rb:73:in `block (3 levels) in load': undefined method `[]' for nil:NilClass (NoMethodError)

我如何在本地预编译资产，并与capistrano上传后?

Answer 1

问题已解决:

这是我的自定义任务工作正常:

 namespace :assets do
    task :precompile, :roles => :web, :except => { :no_release => true } do
      from = source.next_revision(current_revision)
      if capture("cd #{latest_release} && #{source.local.log(from)} vendor/assets/ app/assets/ | wc -l").to_i > 0
        run_locally("rm -rf public/assets/*") 
        run_locally "bundle exec rake assets:precompile"
        find_servers_for_task(current_task).each do |server|
         run_locally "rsync -vr --exclude='.DS_Store' public/assets #{user}@#{server.host}:#{shared_path}/"
        end
      else
        puts.info "Skipping asset pre-compilation because there were no asset changes"
      end
    end
  end

Answer 2

看起来else块中的logger.info是问题所在。

如果您由于其他原因需要在Capistrano中使用日志记录器，您可能需要手动初始化它，因为您实际上并没有在服务器中运行。但是直接打印到控制台可能更容易(就像您对

上面的其他消息所做的那样)。代替

logger.info "Skipping ..."

puts "Skipping ..."