So I'm writing a small gem and I have a '/tasks' dir in it with some specific rake tasks. How do I make those tasks available automatically everywhere, where the gem is required? For example I wish I could run 'rake mygemrake:task' inside my rails root dir after I have the gem installed.
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5 Answers
For Rails3 applications, you might want to look into making a Railtie for your gem.
You can do so with:
lib/your_gem/railtie.rb
require 'your_gem' require 'rails' module YourGem class Railtie < Rails::Railtie rake_tasks do require 'path/to/rake.task' end end end lib/your_gem.rb
module YourGem require "lib/your_gem/railtie" if defined?(Rails) end Though, I had my share of difficulties with requiring the rake.task file in my railtie.rb. I opted to just define my measley one or two tasks within the rake_tasks block.
5 Comments
Benjamin Oakes
Just a word of warning, I couldn't get Rails to require
rake tasks with a .rake extension using this method.
kelly.dunn
I think I remember the error being something akin to what's described here: blog.smartlogicsolutions.com/2009/05/26/… perhaps using
import instead of require is the key to success? I'll dig into this next chance I get a free moment :)
Guilherme Garnier
@BenjaminOakes you could also replace
require with load: load "path/to/file.rake"
nisevi
Hi all, is there a way for creating a rake task without requiring rails?
lulalala
@nisevi it's perfectly fine to create rake task without requiring Rails, e.g. github.com/kjvarga/sitemap_generator/blob/master/lib/…
Check out the rdoctask in rake for an example of how to define a task provided by a gem. The task is defined in ruby instead of the rake build language and can be required like so:
require 'rake' # the gem require 'rake/rdoctask' # the task 
Comments
You have to import those tasks in application's Rakefile. This is how it looks in mine (I am using bundler08 to manage my gems):
%w(gem1 gem2 gem3).each do |g| Dir[File.dirname(__FILE__) + "/vendor/bundler_gems/**/#{g}*/tasks/*.rake"].each do |f| import f end end 
Comments
You can write normal rake tasks for a gem and load them like this:
require 'rake' load 'path/to/your/tasks.rake' Also, take a look at thor vs. rake.
