Rails initializer for using ActiveAdmin with Sass on Heroku

active_admin_heroku.rb

if Rails.env.production?
  require 'fileutils'
  FileUtils.mkdir_p(Rails.root.join("tmp", "stylesheets"))

  template_paths = [
    "#{Gem.loaded_specs['activeadmin'].full_gem_path}/app/assets/stylesheets", # Rails 3.1.x (asset pipeline)
    "#{Gem.loaded_specs['activeadmin'].full_gem_path}/lib/active_admin/sass"   # Rails 3.0.x
  ]

  old_compile_path = "#{Rails.root}/public/stylesheets"
  new_compile_path = "#{Rails.root}/tmp/stylesheets"

  template_paths.each do |template_path|
    Sass::Plugin::remove_template_location( template_path, old_compile_path )
    Sass::Plugin::add_template_location( template_path, new_compile_path )
  end
end

This was what I came up with to get it all running properly on Heroku Bamboo stack, Rails 3.0.9, Compass 0.11.5, and Active Admin 0.3.1. For some reason the previous gists didn't work for me.