deprecation.rb in activesupport-4.0.0.beta1

- old
+ new
@@ -1,18 +1,43 @@
-require 'active_support/deprecation/behaviors'
-require 'active_support/deprecation/reporting'
-require 'active_support/deprecation/method_wrappers'
-require 'active_support/deprecation/proxy_wrappers'
+require 'singleton'
 
 module ActiveSupport
-  module Deprecation
-    class << self
-      # The version the deprecated behavior will be removed, by default.
-      attr_accessor :deprecation_horizon
-    end
-    self.deprecation_horizon = '4.0'
+  # \Deprecation specifies the API used by Rails to deprecate methods, instance
+  # variables, objects and constants.
+  class Deprecation
+    # active_support.rb sets an autoload for ActiveSupport::Deprecation.
+    #
+    # If these requires were at the top of the file the constant would not be
+    # defined by the time their files were loaded. Since some of them reopen
+    # ActiveSupport::Deprecation its autoload would be triggered, resulting in
+    # a circular require warning for active_support/deprecation.rb.
+    #
+    # So, we define the constant first, and load dependencies later.
+    require 'active_support/deprecation/instance_delegator'
+    require 'active_support/deprecation/behaviors'
+    require 'active_support/deprecation/reporting'
+    require 'active_support/deprecation/method_wrappers'
+    require 'active_support/deprecation/proxy_wrappers'
+    require 'active_support/core_ext/module/deprecation'
 
-    # By default, warnings are not silenced and debugging is off.
-    self.silenced = false
-    self.debug = false
+    include Singleton
+    include InstanceDelegator
+    include Behavior
+    include Reporting
+    include MethodWrapper
+
+    # The version the deprecated behavior will be removed, by default.
+    attr_accessor :deprecation_horizon
+
+    # It accepts two parameters on initialization. The first is an version of library
+    # and the second is an library name
+    #
+    #   ActiveSupport::Deprecation.new('2.0', 'MyLibrary')
+    def initialize(deprecation_horizon = '4.1', gem_name = 'Rails')
+      self.gem_name = gem_name
+      self.deprecation_horizon = deprecation_horizon
+      # By default, warnings are not silenced and debugging is off.
+      self.silenced = false
+      self.debug = false
+    end
   end
-end
\ No newline at end of file
+end