Ensure user config is not overwriten by default config.

lib/devise.rb

@@ -12,17 +12,31 @@ module Devise
   TRUE_VALUES = [true, 1, '1', 't', 'T', 'true', 'TRUE'].freeze
 
   # Maps the messages types that comes from warden to a flash type.
+  # This hash is not frozen, so you can add your messages as well.
   FLASH_MESSAGES = {
     :unauthenticated => :success,
     :unconfirmed => :failure
   }
 
-  # Models configuration
-  mattr_accessor :pepper, :stretches, :remember_for, :confirm_within
+  # Used to encrypt password. Please generate one with rake secret
+  mattr_accessor :pepper
+  @@pepper = nil
+  
+  # The number of times to encrypt password.
+  mattr_accessor :stretches
+  @@stretches = 10
+  
+  # Time interval where the remember me token is valid.
+  mattr_accessor :remember_for
+  @@remember_for = 2.weeks
+  
+  # Time interval you can access your account before confirming your account.
+  mattr_accessor :confirm_within
+  @@confirm_within = 0.days
 
-  # Mappings
+  # Store scopes mappings.
   mattr_accessor :mappings
-  self.mappings = {}
+  @@mappings = {}
 
   class << self
     # Default way to setup Devise. Run script/generate devise_install to create
@@ -76,4 +90,4 @@ module Devise
 end
 
 require 'devise/warden'
-require 'devise/rails'
+require 'devise/rails'

lib/devise/models.rb

@@ -16,9 +16,7 @@ module Devise
     # To add the class methods you need to have a module ClassMethods defined
     # inside the given class.
     #
-    def self.config(mod, accessor, default=nil) #:nodoc:
-      Devise.send :"#{accessor}=", default
-
+    def self.config(mod, accessor) #:nodoc:
       mod.class_eval <<-METHOD, __FILE__, __LINE__
         def #{accessor}
           self.class.#{accessor}

lib/devise/models/authenticatable.rb

@@ -91,7 +91,7 @@ module Devise
       end
 
       Devise::Models.config(self, :pepper)
-      Devise::Models.config(self, :stretches, 10)
+      Devise::Models.config(self, :stretches)
     end
   end
 end

lib/devise/models/confirmable.rb

@@ -150,7 +150,7 @@ module Devise
         end
       end
 
-      Devise::Models.config(self, :confirm_within, 0.days)
+      Devise::Models.config(self, :confirm_within)
     end
   end
 end

lib/devise/models/rememberable.rb

@@ -89,7 +89,7 @@ module Devise
         end
       end
 
-      Devise::Models.config(self, :remember_for, 2.weeks)
+      Devise::Models.config(self, :remember_for)
     end
   end
 end