plugins

plugins.rb

module Base
  module Plugins
    def self.plugins
      @plugins ||= []
    end
 
    def self.activate plugin_name
      begin
        plugin = Base::Plugins.const_get(plugin_name.capitalize)
      rescue
        raise "No such plugin \"#{plugin_name.capitalize}\""
      end

      plugins << plugin_name
      plugin.unpack if plugin.respond_to?(:unpack)
    end
  end
end

module Base
  module Plugins
    module Backward
      def self.unpack
        puts "Unpacking #{self}"
        Base::Speaker.send :include, SpeakerRedef
        #Base::Speaker.send :extend, SpeakerRedef
      end

      module SpeakerRedef
        #def self.extended(receiver)
          #receiver.send :include, InstanceMethods
        #end

        #module InstanceMethods
        def say(what)
          super what.reverse
        end
        #end
      end
    end
  end
end
 
module Base
  class Speaker
    def initialize
      puts instance_eval("class << self; self; end").ancestors.inspect
    end

    def say(what)
      p "say: #{what}"
    end
  end

  class Server
    s = Base::Speaker.new
    s.say 'hello world'

    include Plugins
    Base::Plugins.activate 'backward'
    s2 = Base::Speaker.new
    s.say 'hello world'
    s2.say 'hello world'
  end
end
 
 
Base::Server.new