method_added and singleton_method_added

#!/usr/bin/ruby

module DefineHook
  def self.included(other)
    puts "#{other} include #{self}"
    puts "ancestors: #{other.ancestors}"
  end
  def self.extended(other)
    puts "#{other} extend #{self}"
    puts "singleton_class.ancestors: #{other.singleton_class.ancestors}"
  end
  def method_added(name)
    puts "#{self}##{name} added"
    super
  end
  def singleton_method_added(name)
    puts "#{self}.#{name} added"
    super
  end
end

module Foo
  class << self; include DefineHook; end
  def foo1; end
  module_function :foo1
  def self.foo2; end
end

class Bar
  extend DefineHook
  def bar1; end
  def self.bar2; end
end