cursed_alias_method_chain.rb

require "bundler/inline"

gemfile do
  source "https://rubygems.org"
  gem "activesupport", "~> 4.2"
end

require "active_support/all"

class Dog
  def speak
    "woof!"
  end
end

module British
  def speak
    "#{super} eh, wot?"
  end
end

class BritishDog < Dog
  prepend British
end

puts "only prepend: #{BritishDog.new.speak}"

class Cat
  def speak
    "meow!"
  end
end

module Pirate
  def self.included(base)
    base.class_eval do
      alias_method_chain :speak, :pirate_accent
    end
  end

  def speak_with_pirate_accent
    "#{speak_without_pirate_accent} yarr!"
  end
end

class PirateCat < Cat
  include Pirate
end

puts "only a_m_c: #{PirateCat.new.speak}"

class Duck
  def speak
    "quack!"
  end
end

class PirateBritishDuck < Duck
  include Pirate
  prepend British
end

puts "a_m_c then prepend: #{PirateBritishDuck.new.speak}"

class Bear
  def speak
    "growl!"
  end
end

class BritishPirateBear < Bear
  prepend British
  include Pirate
end

puts "prepend then a_m_c: #{BritishPirateBear.new.speak}"

Looks like I independently rediscovered something NewRelic discovered ages ago https://gist.github.com/kenichi/f251b30c7c852b5e035a903754e2434d