erb_index_path = File.join %w(app views layouts application.html.erb)
@generator.remove_file(erb_index_path)
haml_index_path = File.join %w(app views layouts application.html.haml)
@generator.create_file haml_index_path, <<-HAML
!!!
%html
  %head
    %title #{app_name}
    = stylesheet_link_tag    'application', media: 'all'
    = javascript_include_tag 'application'
    = csrf_meta_tags

  %body{:class => controller_name}
    = yield
HAML