require 'active_support/concern' require 'active_support/ordered_options' require 'active_support/core_ext/kernel/singleton_class' require 'active_support/core_ext/module/delegation' module ActiveSupport # Configurable provides a config method to store and retrieve # configuration options as an OrderedHash. module Configurable extend ActiveSupport::Concern module ClassMethods def config @_config ||= ActiveSupport::InheritableOptions.new(superclass.respond_to?(:config) ? superclass.config : {}) end def configure yield config end def config_accessor(*names) names.each do |name| code, line = <<-RUBY, __LINE__ + 1 def #{name}; config.#{name}; end def #{name}=(value); config.#{name} = value; end RUBY singleton_class.class_eval code, __FILE__, line class_eval code, __FILE__, line end end end # Reads and writes attributes from a configuration OrderedHash. # # Example: # # require 'active_support/configurable' # # class User # include ActiveSupport::Configurable # end # # user = User.new # # user.config.allowed_access = true # user.config.level = 1 # # user.config.allowed_access # => true # user.config.level # => 1 # def config @_config ||= ActiveSupport::InheritableOptions.new(self.class.config) end end end