Inheritable Module Class Methods

Problem.rb

# Here's the original problem:

module Feature
  module ClassMethods
    def feature
    end
  end

  def self.included(includer)
    includer.extend ClassMethods
  end
end

# i want the ::included method to be "inherited", so that this works:

module Client
  include Feature
end

module Extension
  include Client
end

module Plugin
  include Extension
end

module Framework
  include Plugin
end

Client.feature
Extension.feature
Plugin.feature
Framework.feature

Solution.rb

# here's a dead simple solution.

module Feature
  module ClassMethods
    def feature
    end
  end

  InheritedIncludedCodeBlock = lambda do |includer|
    includer.extend ClassMethods
  end

  module RecursiveIncluded
    def included(includer)
      #super # TODO: test me.
      puts "RecursiveIncluded in #{includer}"

      includer.module_eval do
        InheritedIncludedCodeBlock.call(includer)
        extend RecursiveIncluded
      end
    end
  end
  extend RecursiveIncluded
end

# 1. i use a recursive ::included to inherit the behaviour to including modules
# 2. the only problem is referencing the InheritedIncludedCodeBlock