Simplify helpers handling. Ensure Metal can run AC hooks.

actionpack/lib/action_controller/metal/helpers.rb

@@ -52,6 +52,7 @@ module ActionController
   module Helpers
     extend ActiveSupport::Concern
 
+    class << self; attr_accessor :helpers_path; end
     include AbstractController::Helpers
 
     included do

actionpack/lib/action_controller/railtie.rb

@@ -3,33 +3,32 @@ require "action_controller"
 require "action_dispatch/railtie"
 require "action_view/railtie"
 require "abstract_controller/railties/routes_helpers"
-require "action_controller/railties/paths"
+require "action_controller/railties/helpers"
 
 module ActionController
   class Railtie < Rails::Railtie #:nodoc:
     config.action_controller = ActiveSupport::OrderedOptions.new
 
-    initializer "action_controller.logger" do
-      ActiveSupport.on_load(:action_controller) { self.logger ||= Rails.logger }
-    end
-
-    initializer "action_controller.initialize_framework_caches" do
-      ActiveSupport.on_load(:action_controller) { self.cache_store ||= Rails.cache if respond_to?(:cache_store) }
-    end
-
     initializer "action_controller.assets_config", :group => :all do |app|
       app.config.action_controller.assets_dir ||= app.config.paths["public"].first
     end
 
+    initializer "action_controller.set_helpers_path" do |app|
+      ActionController::Helpers.helpers_path = app.helpers_paths
+    end
+
     initializer "action_controller.set_configs" do |app|
       paths   = app.config.paths
       options = app.config.action_controller
 
+      options.logger               ||= Rails.logger
+      options.cache_store          ||= Rails.cache
+
       options.javascripts_dir      ||= paths["public/javascripts"].first
       options.stylesheets_dir      ||= paths["public/stylesheets"].first
       options.page_cache_directory ||= paths["public"].first
 
-      # make sure readers methods get compiled
+      # Ensure readers methods get compiled
       options.asset_path           ||= app.config.asset_path
       options.asset_host           ||= app.config.asset_host
       options.relative_url_root    ||= app.config.relative_url_root
@@ -37,7 +36,8 @@ module ActionController
       ActiveSupport.on_load(:action_controller) do
         include app.routes.mounted_helpers
         extend ::AbstractController::Railties::RoutesHelpers.with(app.routes)
-        extend ::ActionController::Railties::Paths.with(app) if respond_to?(:helpers_path)
+        extend ::ActionController::Railties::Helpers
+
         options.each do |k,v|
           k = "#{k}="
           if respond_to?(k)

actionpack/lib/action_controller/railties/helpers.rb

@@ -0,0 +1,22 @@
+module ActionController
+  module Railties
+    module Helpers
+      def inherited(klass)
+        super
+        return unless klass.respond_to?(:helpers_path=)
+
+        if namespace = klass.parents.detect { |m| m.respond_to?(:railtie_helpers_paths) }
+          paths = namespace.railtie_helpers_paths
+        else
+          paths = ActionController::Helpers.helpers_path
+        end
+
+        klass.helpers_path = paths
+
+        if klass.superclass == ActionController::Base && ActionController::Base.include_all_helpers
+          klass.helper :all
+        end
+      end
+    end
+  end
+end

actionpack/lib/action_controller/railties/paths.rb

@@ -1,24 +0,0 @@
-module ActionController
-  module Railties
-    module Paths
-      def self.with(app)
-        Module.new do
-          define_method(:inherited) do |klass|
-            super(klass)
-
-            if namespace = klass.parents.detect { |m| m.respond_to?(:railtie_helpers_paths) }
-              paths = namespace.railtie_helpers_paths
-            else
-              paths = app.helpers_paths
-            end
-            klass.helpers_path = paths
-
-            if klass.superclass == ActionController::Base && ActionController::Base.include_all_helpers
-              klass.helper :all
-            end
-          end
-        end
-      end
-    end
-  end
-end

railties/lib/rails/engine.rb

@@ -561,7 +561,7 @@ module Rails
     initializer :add_view_paths do
       views = paths["app/views"].existent
       unless views.empty?
-        ActiveSupport.on_load(:action_controller){ prepend_view_path(views) }
+        ActiveSupport.on_load(:action_controller){ prepend_view_path(views) if respond_to?(:prepend_view_path) }
         ActiveSupport.on_load(:action_mailer){ prepend_view_path(views) }
       end
     end

railties/test/application/loading_test.rb

@@ -95,7 +95,7 @@ class LoadingTest < ActiveSupport::TestCase
     assert_equal [ActiveRecord::SchemaMigration], ActiveRecord::Base.descendants
   end
 
-  test "initialize_cant_be_called_twice" do
+  test "initialize cant be called twice" do
     require "#{app_path}/config/environment"
     assert_raise(RuntimeError) { ::AppTemplate::Application.initialize! }
   end
@@ -256,6 +256,35 @@ class LoadingTest < ActiveSupport::TestCase
     assert_equal "BODY", last_response.body
   end
 
+  test "AC load hooks can be used with metal" do
+    app_file "app/controllers/omg_controller.rb", <<-RUBY
+      begin
+        class OmgController < ActionController::Metal
+          ActiveSupport.run_load_hooks(:action_controller, self)
+          def show
+            self.response_body = ["OK"]
+          end
+        end
+      rescue => e
+        puts "Error loading metal: \#{e.class} \#{e.message}"
+      end
+    RUBY
+
+    app_file "config/routes.rb", <<-RUBY
+      AppTemplate::Application.routes.draw do
+        match "/:controller(/:action)"
+      end
+    RUBY
+
+    require "#{rails_root}/config/environment"
+
+    require 'rack/test'
+    extend Rack::Test::Methods
+
+    get '/omg/show'
+    assert_equal 'OK', last_response.body
+  end
+
   protected
 
   def setup_ar!