包括在宝石中的耙子任务 [英] including rake tasks in gems

问题描述

1）在宝石内部的耙子任务有没有最好的地方？我已经在/ tasks，/ lib / tasks中看到过它们，并且我将它们看作* .rb和* .rake - 不确定哪个（如果有的话）是'正确的'。

2）在环境中配置gem后，如何让它们可用？

在Rails 3上，你通过Railties来完成。下面是为我创建的宝石所做的代码：

  class BackupTask< Rails :: Railtie 
 rake_tasks do 
 Dir [File.join（File.dirname（__ FILE __），'tasks / *。rake'）]。each {| f | load f} 
 end 
 end 
  

所以你基本上创建一个继承来自Rails :: Railtie，然后在这个类中你有一个rake_tasks块来加载相关的文件。如果你想使用.rake扩展名，你必须加载而不是require。

我发现我需要指定Dir的完整路径（因此File.join体操）。如果我只是想明确列出这个文件，那么我可以说只是说加载任务/ foo.rake'，因为我的宝石的lib目录位于加载路径中。

1) Is there a 'best' place for rake tasks inside of gems? I've seen them in /tasks, /lib/tasks, and I've seen them written as *.rb and *.rake -- not sure which (if any) is 'correct'

2) How do I make them available to the app once the gem is configured in the environment?

解决方案

On Rails 3, you do this via Railties. Here's the code to do it for a gem I just made:

class BackupTask < Rails::Railtie
  rake_tasks do
    Dir[File.join(File.dirname(__FILE__),'tasks/*.rake')].each { |f| load f }
  end
end

So you basically create a class that inherits from Rails::Railtie, then within that class you have a rake_tasks block that loads the relevant files. You must load instead of require if you want to use a .rake extension.

I found that I need to specify the full path to Dir (hence the File.join gymnastics). If I just wanted to list the file explicitly then I could get away with just saying "load 'tasks/foo.rake'" because the lib dir of my gem was in the load path.

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