rails--rails/railties/lib/generators/rails/mailer/mailer_generator.rb

module Rails
  module Generators
    class MailerGenerator < NamedBase
      argument :actions, :type => :array, :default => [], :banner => "method method"
      check_class_collision

      def create_mailer_file
        template "mailer.rb", File.join('app/models', class_path, "#{file_name}.rb")
      end

      hook_for :template_engine, :test_framework
    end
  end
end