1 files changed, 19 insertions, 18 deletions
diff --git a/actionmailer/lib/action_mailer.rb b/actionmailer/lib/action_mailer.rb
index 41ed399308..e7ad68e212 100644
--- a/actionmailer/lib/action_mailer.rb
+++ b/actionmailer/lib/action_mailer.rb
@@ -21,37 +21,38 @@
 # WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #++
 
-actionpack_path = "#{File.dirname(__FILE__)}/../../actionpack/lib"
-$:.unshift(actionpack_path) if File.directory?(actionpack_path)
+actionpack_path = File.expand_path('../../../actionpack/lib', __FILE__)
+$:.unshift(actionpack_path) if File.directory?(actionpack_path) && !$:.include?(actionpack_path)
+
 require 'action_controller'
 require 'action_view'
 
 module ActionMailer
-  def self.load_all!
-    [Base, Part, ::Text::Format, ::Net::SMTP]
-  end
-
-  autoload :AdvAttrAccessor, 'action_mailer/adv_attr_accessor'
-  autoload :DeprecatedBody, 'action_mailer/deprecated_body'
-  autoload :Base, 'action_mailer/base'
-  autoload :DeliveryMethod, 'action_mailer/delivery_method'
-  autoload :Part, 'action_mailer/part'
-  autoload :PartContainer, 'action_mailer/part_container'
-  autoload :Quoting, 'action_mailer/quoting'
-  autoload :TestCase, 'action_mailer/test_case'
-  autoload :TestHelper, 'action_mailer/test_helper'
-
+  extend ::ActiveSupport::Autoload
+
+  autoload :AdvAttrAccessor
+  autoload :DeprecatedBody
+  autoload :Base
+  autoload :DeliveryMethod
+  autoload :Part
+  autoload :PartContainer
+  autoload :Quoting
+  autoload :TestCase
+  autoload :TestHelper
 end
 
 module Text
+  extend ActiveSupport::Autoload
+
   autoload :Format, 'action_mailer/vendor/text_format'
 end
 
 module Net
-  autoload :SMTP, 'net/smtp'
+  extend ActiveSupport::Autoload
+
+  autoload :SMTP
 end
 
-autoload :MailHelper, 'action_mailer/mail_helper'
 
 gem 'mail', '>= 1.3.0'
 require 'mail'