New alternatives for rails/init.rb in Rails 3 gems

In Rails 3 the rails/init.rb in gems is not automatically executed
anymore (see
As I see there a now two options:

  1. Put scripts in config/initializers.
  2. Create a lib/my_gem_name.rb

The second alternative seems to be used for example by devise (http://
GitHub - heartcombo/devise: Flexible authentication solution for Rails with Warden.).
Is that right?