1 files changed, 36 insertions, 3 deletions
diff --git a/railties/lib/rails/configuration.rb b/railties/lib/rails/configuration.rb
index 66fab0a760..3d66019e5e 100644
--- a/railties/lib/rails/configuration.rb
+++ b/railties/lib/rails/configuration.rb
@@ -1,12 +1,39 @@
 require 'active_support/deprecation'
 require 'active_support/ordered_options'
-require 'active_support/core_ext/hash/deep_dup'
+require 'active_support/core_ext/object'
 require 'rails/paths'
 require 'rails/rack'
 
 module Rails
   module Configuration
-    class MiddlewareStackProxy #:nodoc:
+    # MiddlewareStackProxy is a proxy for the Rails middleware stack that allows
+    # you to configure middlewares in your application. It works basically as a
+    # command recorder, saving each command to be applied after initialization
+    # over the default middleware stack, so you can add, swap, or remove any
+    # middleware in Rails.
+    #
+    # You can add your own middlewares by using the +config.middleware.use+ method:
+    #
+    #     config.middleware.use Magical::Unicorns
+    #
+    # This will put the <tt>Magical::Unicorns</tt> middleware on the end of the stack.
+    # You can use +insert_before+ if you wish to add a middleware before another:
+    #
+    #     config.middleware.insert_before ActionDispatch::Head, Magical::Unicorns
+    #
+    # There's also +insert_after+ which will insert a middleware after another:
+    #
+    #     config.middleware.insert_after ActionDispatch::Head, Magical::Unicorns
+    #
+    # Middlewares can also be completely swapped out and replaced with others:
+    #
+    #     config.middleware.swap ActionDispatch::BestStandardsSupport, Magical::Unicorns
+    #
+    # And finally they can also be removed from the stack completely:
+    #
+    #     config.middleware.delete ActionDispatch::BestStandardsSupport
+    #
+    class MiddlewareStackProxy
       def initialize
         @operations = []
       end
@@ -33,7 +60,7 @@ module Rails
         @operations << [:delete, args, block]
       end
 
-      def merge_into(other)
+      def merge_into(other) #:nodoc:
         @operations.each do |operation, args, block|
           other.send(operation, *args, &block)
         end
@@ -43,6 +70,7 @@ module Rails
 
     class Generators #:nodoc:
       attr_accessor :aliases, :options, :templates, :fallbacks, :colorize_logging
+      attr_reader :hidden_namespaces
 
       def initialize
         @aliases = Hash.new { |h,k| h[k] = {} }
@@ -50,6 +78,7 @@ module Rails
         @fallbacks = {}
         @templates = []
         @colorize_logging = true
+        @hidden_namespaces = []
       end
 
       def initialize_copy(source)
@@ -59,6 +88,10 @@ module Rails
         @templates = @templates.dup
       end
 
+      def hide_namespace(namespace)
+        @hidden_namespaces << namespace
+      end
+
       def method_missing(method, *args)
         method = method.to_s.sub(/=$/, '').to_sym