Extract assets paths and make them available to Action Mailer as well

actionmailer/lib/action_mailer/base.rb

@@ -311,6 +311,7 @@ module ActionMailer #:nodoc:
     include AbstractController::Layouts
     include AbstractController::Helpers
     include AbstractController::Translation
+    include AbstractController::AssetPaths
 
     helper  ActionMailer::MailHelper
 

actionmailer/lib/action_mailer/railtie.rb

@@ -13,7 +13,16 @@ module ActionMailer
     end
 
     initializer "action_mailer.set_configs" do |app|
+      paths = app.config.paths
+      am = app.config.action_mailer
+
+      am.assets_dir      ||= paths.public.to_a.first
+      am.javascripts_dir ||= paths.public.javascripts.to_a.first
+      am.stylesheets_dir ||= paths.public.stylesheets.to_a.first
+
       ActiveSupport.on_load(:action_mailer) do
+        self.config.merge!(am)
+
         include app.routes.url_helpers
 
         app.config.action_mailer.each do |k,v|

actionpack/lib/abstract_controller.rb

@@ -20,5 +20,6 @@ module AbstractController
   autoload :Logger
   autoload :Rendering
   autoload :Translation
+  autoload :AssetPaths
   autoload :ViewPaths
 end

actionpack/lib/action_controller/base.rb

@@ -13,6 +13,7 @@ module ActionController
     MODULES = [
       AbstractController::Layouts,
       AbstractController::Translation,
+      AbstractController::AssetPaths,
 
       Helpers,
       HideActions,
@@ -67,7 +68,7 @@ module ActionController
     end
 
     # TODO Move this to the appropriate module
-    config_accessor :assets_dir, :asset_path, :javascripts_dir, :stylesheets_dir
+    config_accessor :asset_path
 
     ActiveSupport.run_load_hooks(:action_controller, self)
   end