Include routes helpers only for inherited classes in ActionMailer

actionmailer/lib/action_mailer/base.rb

@@ -5,6 +5,7 @@ require 'active_support/core_ext/array/wrap'
 require 'active_support/core_ext/object/blank'
 require 'active_support/core_ext/proc'
 require 'action_mailer/log_subscriber'
+require 'action_mailer/hide_actions'
 
 module ActionMailer #:nodoc:
   # Action Mailer allows you to send email from your application using a mailer model and views.
@@ -346,6 +347,7 @@ module ActionMailer #:nodoc:
 
     helper  ActionMailer::MailHelper
     include ActionMailer::OldApi
+    include ActionMailer::HideActions
 
     delegate :register_observer, :to => Mail
     delegate :register_interceptor, :to => Mail
@@ -361,6 +363,11 @@ module ActionMailer #:nodoc:
     }.freeze
 
     class << self
+      def inherited(klass)
+        klass.with_hiding_actions do
+          super(klass)
+        end
+      end
 
       def mailer_name
         @mailer_name ||= name.underscore
@@ -725,27 +732,8 @@ 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
+    class_attribute :default_url_options
+    self.default_url_options = {}
 
     ActiveSupport.run_load_hooks(:action_mailer, self)
   end

actionmailer/lib/action_mailer/hide_actions.rb

@@ -0,0 +1,46 @@
+require 'active_support/core_ext/class/attribute'
+
+module ActionMailer
+  # ActionController::HideActions adds the ability to prevent public methods on a controller
+  # to be called as actions.
+  module HideActions
+    extend ActiveSupport::Concern
+
+    included do
+      class_attribute :hidden_actions
+      self.hidden_actions = Set.new.freeze
+    end
+
+  private
+
+    module ClassMethods
+      # Sets all of the actions passed in as hidden actions.
+      #
+      # ==== Parameters
+      # *args<#to_s>:: A list of actions
+      def hide_action(*args)
+        self.hidden_actions = hidden_actions.dup.merge(args.map(&:to_s)).freeze
+      end
+
+      # Run block and add all the new action_methods to hidden_actions.
+      # This is used in inherited method.
+      def with_hiding_actions
+        yield
+        clear_action_methods!
+        hide_action(*action_methods)
+        clear_action_methods!
+      end
+
+      def clear_action_methods!
+        @action_methods = nil
+      end
+
+      # Overrides AbstractController::Base#action_methods to remove any methods
+      # that are listed as hidden methods.
+      def action_methods
+        @action_methods ||= super.reject { |name| hidden_actions.include?(name) }
+      end
+    end
+  end
+end
+

actionmailer/lib/action_mailer/railtie.rb

@@ -19,9 +19,8 @@ module ActionMailer
       options.stylesheets_dir ||= paths.public.stylesheets.to_a.first
 
       ActiveSupport.on_load(:action_mailer) do
-        include app.routes.url_helpers
+        extend ::ActionMailer::Railties::RoutesHelpers.with(app.routes)
         include app.routes.mounted_helpers(:app)
-        extend ::ActionMailer::Railties::RoutesHelpers
         options.each { |k,v| send("#{k}=", v) }
       end
     end

actionmailer/lib/action_mailer/railties/routes_helpers.rb

@@ -1,10 +1,16 @@
 module ActionMailer
   module Railties
     module RoutesHelpers
-      def inherited(klass)
-        super(klass)
-        if namespace = klass.parents.detect {|m| m.respond_to?(:_railtie) }
-          klass.send(:include, namespace._railtie.routes.url_helpers)
+      def self.with(routes)
+        Module.new do
+          define_method(:inherited) do |klass|
+            super(klass)
+            if namespace = klass.parents.detect {|m| m.respond_to?(:_railtie) }
+              klass.send(:include, namespace._railtie.routes.url_helpers)
+            else
+              klass.send(:include, routes.url_helpers)
+            end
+          end
         end
       end
     end

railties/test/railties/engine_test.rb

@@ -410,6 +410,7 @@ module RailtiesTest
 
       assert_equal Bukkits._railtie, Bukkits::Engine
       assert ::Bukkits::MyMailer.method_defined?(:foo_path)
+      assert !::Bukkits::MyMailer.method_defined?(:bar_path)
 
       env = Rack::MockRequest.env_for("/bukkits/from_app")
       response = AppTemplate::Application.call(env)