lib/prependable.rb


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# This module is based on: https://gist.github.com/bcardarella/5735987

module Prependable
  include ActiveSupport::Concern

  def self.extended(base) #:nodoc:
    base.instance_variable_set(:@_dependencies, [])
  end

  def prepend_features(base)
    if base.instance_variable_defined?(:@_dependencies)
      base.instance_variable_get(:@_dependencies) << self
      return false
    else
      return false if base < self
      super
      base.singleton_class.send(:prepend, const_get('ClassMethods'))  if const_defined?(:ClassMethods)
      @_dependencies.each { |dep| base.send(:include, dep) }
      base.class_eval(&@_included_block) if instance_variable_defined?(:@_included_block)
    end
  end

  alias_method :prepended, :included
end