Calling Rake tasks with Thor

To call a Rake task from a Thorfile, or a Ruby script loading the Thor libraries, a little more is needed than just calling the thor/rake_compat library. The Thorfile will need to have a task created to call it.

This example comes from the RDoc documentation for Thor::RakeCompat

require 'thor/rake_compat'
require 'rspec/core/rake_task'

class Default < Thor
  include Thor::RakeCompat

  RSpec::Core::RakeTask.new(:spec) do |t|
    t.rspec_opts = ['--options', './.rspec']
  end

  desc 'spec', 'Run RSpec tests'
  def spec
    Rake::Task['spec'].invoke
  end
end

This creates the rake spec task, but it needs to be called using the Rake::Task['spec'].invoke method.

This example is coming almost directly from the Thor Spec tests for rake_compat_spec.rb.

require 'thor/rake_compat'
require "rake/tasklib"

class RakeTask < Rake::TaskLib
  def initialize
    define
  end

  def define
    instance_eval do
      desc "Say it's cool"
      task :cool do
        puts "COOL"
      end

      namespace :hiper_mega do
        task :super do
          puts "HIPER MEGA SUPER"
        end
      end
    end
  end
end

class ThorTask < Thor
  include Thor::RakeCompat
  RakeTask.new
  
  desc 'cool', 'say cool'
  def cool
    Rake::Task['cool'].invoke
    puts ThorTask.tasks['cool'].description
  end
end

The result is:

thor thor_task:cool
COOL
say cool