This commit merges most of the work done by Piotr Sarnacki in his Ruby Summer of Code project.

His work brings several capabilities from app to engines, as routes, middleware stack, asset handling and much more. Please check Rails::Engine documentation for more refenrences.

Merge remote branch 'drogus/engines'

2 files changed, 5 insertions, 25 deletions

diff --git a/actionmailer/lib/action_mailer/base.rb b/actionmailer/lib/action_mailer/base.rb
index 31e1b26afd..6ae3940e6d 100644
--- a/actionmailer/lib/action_mailer/base.rb
+++ b/actionmailer/lib/action_mailer/base.rb
@@ -361,7 +361,6 @@ module ActionMailer #:nodoc:
     }.freeze
 
     class << self
-
       def mailer_name
         @mailer_name ||= name.underscore
       end
@@ -725,28 +724,6 @@ module ActionMailer #:nodoc:
       container.add_part(part)
     end
 
-    module DeprecatedUrlOptions
-      def default_url_options
-        deprecated_url_options
-      end
-
-      def default_url_options=(val)
-        deprecated_url_options
-      end
-
-      def deprecated_url_options
-        raise "You can no longer call ActionMailer::Base.default_url_options " \
-              "directly. You need to set config.action_mailer.default_url_options. " \
-              "If you are using ActionMailer standalone, you need to include the " \
-              "routing url_helpers directly."
-      end
-    end
-
-    # This module will complain if the user tries to set default_url_options
-    # directly instead of through the config object. In Action Mailer's Railtie,
-    # we include the router's url_helpers, which will override this module.
-    extend DeprecatedUrlOptions
-
     ActiveSupport.run_load_hooks(:action_mailer, self)
   end
 end
diff --git a/actionmailer/lib/action_mailer/railtie.rb b/actionmailer/lib/action_mailer/railtie.rb
index ce6d8cc5b5..a2b00addc9 100644
--- a/actionmailer/lib/action_mailer/railtie.rb
+++ b/actionmailer/lib/action_mailer/railtie.rb
@@ -1,5 +1,6 @@
 require "action_mailer"
 require "rails"
+require "abstract_controller/railties/routes_helpers"
 
 module ActionMailer
   class Railtie < Rails::Railtie
@@ -18,9 +19,11 @@ module ActionMailer
       options.stylesheets_dir ||= paths.public.stylesheets.to_a.first
 
       ActiveSupport.on_load(:action_mailer) do
-        include app.routes.url_helpers
+        include AbstractController::UrlFor
+        extend ::AbstractController::Railties::RoutesHelpers.with(app.routes)
+        include app.routes.mounted_helpers(:app)
         options.each { |k,v| send("#{k}=", v) }
       end
     end
   end
-end
\ No newline at end of file
+end