A Mixin module, that configures other modules so they can be included or extended.

gistfile1.rb

  module Mixin
    def self.included(base)
      base.module_eval do
        def self.mixin(*modules,&block)
          @mixin_modules = modules
          @mixin_block = block

          def self.included(base)
            unless @mixin_modules.empty?
              base.send(:include,*@mixin_modules)
            end

            if @mixin_block
              base.module_eval(&@mixin_block)
            end
          end

          def self.extended(base)
            unless @mixin_modules.empty?
              base.send(:extend,*@mixin_modules) 
            end

            if @mixin_block
              base.instance_eval(&@mixin_block)
            end
          end
        end
      end
    end
  end