Reorganize autoloads:

  * A new module (ActiveSupport::Autoload) is provide that extends
    autoloading with new behavior.
  * All autoloads in modules that have extended ActiveSupport::Autoload
    will be eagerly required in threadsafe environments
  * Autoloads can optionally leave off the path if the path is the same
    as full_constant_name.underscore
  * It is possible to specify that a group of autoloads live under an
    additional path. For instance, all of ActionDispatch's middlewares
    are ActionDispatch::MiddlewareName, but they live under 
    "action_dispatch/middlewares/middleware_name"
  * It is possible to specify that a group of autoloads are all found
    at the same path. For instance, a number of exceptions might all
    be declared there.
  * One consequence of this is that testing-related constants are not
    autoloaded. To get the testing helpers for a given component,
    require "component_name/test_case". For instance, "action_controller/test_case".
  * test_help.rb, which is automatically required by a Rails application's
    test helper, requires the test_case.rb for all active components, so
    this change will not be disruptive in existing or new applications.

1 files changed, 18 insertions, 16 deletions

diff --git a/actionmailer/lib/action_mailer.rb b/actionmailer/lib/action_mailer.rb
index 23f04a11ba..12e781b6c3 100644
--- a/actionmailer/lib/action_mailer.rb
+++ b/actionmailer/lib/action_mailer.rb
@@ -25,32 +25,34 @@ actionpack_path = "#{File.dirname(__FILE__)}/../../actionpack/lib"
 $:.unshift(actionpack_path) if File.directory?(actionpack_path)
 require 'action_controller'
 require 'action_view'
+require 'active_support/autoload'
 
 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'
-  autoload :Utils, 'action_mailer/utils'
+  extend ::ActiveSupport::Autoload
+
+  autoload :AdvAttrAccessor
+  autoload :DeprecatedBody
+  autoload :Base
+  autoload :DeliveryMethod
+  autoload :MailHelper
+  autoload :Part
+  autoload :PartContainer
+  autoload :Quoting
+  autoload :TestHelper
+  autoload :Utils
 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'
 
 require 'action_mailer/vendor/tmail'