Include Rake tasks from a gem into my engine

Question

I'm creating a rails engine, which I have written some rake tasks in. My rake tasks call rake tasks in a 3rd-party gem, which I've included as a dependency in my gemspec.

When I try to run my rake tasks, it fails stating it cannot find the tasks from the 3rd party gem. Which makes senses considering Rake -T shows my tasks, but not the 3rd party's.

If I include the 3rd party gem in my application gemfile, everything is perfect, but I don't want to do this.

I'm guessing I need to add another include to my engine's rake_tasks do block, but no idea what to include. I've tried a variety of paths, but none seem to work.

Were you able to resolve this issue ? – Anand Joshi Oct 16 '18 at 19:42 — Anand Joshi, Oct 16 '18 at 19:42

rplaurindo · Answer 1 · 2017-10-16T18:26:16.390

2

# lib/my_gem.rb
module MyGem
  ROOT_PATH = File.expand_path "../../", __FILE__
  # :: before of the module name it is not to encapsulate the module "My Gem"
  module ::Rails
    class Application
      rake_tasks do
        Dir[File.join(ROOT_PATH, "/lib/tasks/", "**/*.rake")].each do |file|
          load file
        end
      end
    end
  end
end

edited Oct 16 '17 at 18:26

answered Nov 16 '15 at 10:44

rplaurindo

1,277
14
23

score 1 · Answer 2 · edited May 23 '17 at 12:15

Sounds like your third party gem may not have a railtie set up. The rake tasks from gems aren't automatically included within a Rails application. Here are two good resources which help explain how to set up a Rail tie, from which you can probably base some code to manually include the third party gem's rake tasks:

including rake tasks in gems

http://blog.nathanhumbert.com/2010/02/rails-3-loading-rake-tasks-from-gem.html

Include Rake tasks from a gem into my engine

2 Answers2