rails--rails/railties/lib/rails/railtie/configuration.rb

require 'rails/configuration'

module Rails
  class Railtie
    class Configuration
      def initialize
        @@options ||= {}
      end

      # Holds generators configuration:
      #
      #   config.generators do |g|
      #     g.orm             :datamapper, :migration => true
      #     g.template_engine :haml
      #     g.test_framework  :rspec
      #   end
      #
      # If you want to disable color in console, do:
      #
      #   config.generators.colorize_logging = false
      #
      def generators
        @@generators ||= Rails::Configuration::Generators.new
        if block_given?
          yield @@generators
        else
          @@generators
        end
      end

      def after_initialize_blocks
        @@after_initialize_blocks ||= []
      end

      def after_initialize(&blk)
        after_initialize_blocks << blk if blk
      end

      def to_prepare_blocks
        @@to_prepare_blocks ||= []
      end

      def to_prepare(&blk)
        to_prepare_blocks << blk if blk
      end

      def respond_to?(name)
        super || @@options.key?(name.to_sym)
      end

    private

      def method_missing(name, *args, &blk)
        if name.to_s =~ /=$/
          @@options[$`.to_sym] = args.first
        elsif @@options.key?(name)
          @@options[name]
        else
          super
        end
      end
    end
  end
end