Added support for multiple routes files and made draw not clear the map so they can be additive

actionpack/lib/action_controller/routing/route_set.rb

@@ -200,9 +200,11 @@ def formatted_#{selector}(*args)
           end
       end
 
-      attr_accessor :routes, :named_routes, :configuration_file
+      attr_accessor :routes, :named_routes, :configuration_files
 
       def initialize
+        self.configuration_files = []
+
         self.routes = []
         self.named_routes = NamedRouteCollection.new
 
@@ -216,7 +218,6 @@ def builder
       end
 
       def draw
-        clear!
         yield Mapper.new(self)
         install_helpers
       end
@@ -240,8 +241,22 @@ def empty?
         routes.empty?
       end
 
+      def add_configuration_file(path)
+        self.configuration_files << path
+      end
+
+      # Deprecated accessor
+      def configuration_file=(path)
+        add_configuration_file(path)
+      end
+      
+      # Deprecated accessor
+      def configuration_file
+        configuration_files
+      end
+
       def load!
-        Routing.use_controllers! nil # Clear the controller cache so we may discover new ones
+        Routing.use_controllers!(nil) # Clear the controller cache so we may discover new ones
         clear!
         load_routes!
       end
@@ -250,24 +265,39 @@ def load!
       alias reload! load!
 
       def reload
-        if @routes_last_modified && configuration_file
-          mtime = File.stat(configuration_file).mtime
-          # if it hasn't been changed, then just return
-          return if mtime == @routes_last_modified
-          # if it has changed then record the new time and fall to the load! below
-          @routes_last_modified = mtime
+        if configuration_files.any? && @routes_last_modified
+          if routes_changed_at == @routes_last_modified
+            return # routes didn't change, don't reload
+          else
+            @routes_last_modified = routes_changed_at
+          end
         end
+
         load!
       end
 
       def load_routes!
-        if configuration_file
-          load configuration_file
-          @routes_last_modified = File.stat(configuration_file).mtime
+        if configuration_files.any?
+          configuration_files.each { |config| load(config) }
+          @routes_last_modified = routes_changed_at
         else
           add_route ":controller/:action/:id"
         end
       end
+      
+      def routes_changed_at
+        routes_changed_at = nil
+        
+        configuration_files.each do |config|
+          config_changed_at = File.stat(config).mtime
+
+          if routes_changed_at.nil? || config_changed_at > routes_changed_at
+            routes_changed_at = config_changed_at 
+          end
+        end
+        
+        routes_changed_at
+      end
 
       def add_route(path, options = {})
         route = builder.build(path, options)

actionpack/test/controller/routing_test.rb

@@ -747,12 +747,16 @@ def setup
       ActionController::Base.optimise_named_routes = true
 
       @rs = ::ActionController::Routing::RouteSet.new
-      @rs.draw {|m| m.connect ':controller/:action/:id' }
 
       ActionController::Routing.use_controllers! %w(content admin/user admin/news_feed)
     end
+    
+    def teardown
+      @rs.clear!
+    end
 
     def test_default_setup
+      @rs.draw {|m| m.connect ':controller/:action/:id' }
       assert_equal({:controller => "content", :action => 'index'}, rs.recognize_path("/content"))
       assert_equal({:controller => "content", :action => 'list'}, rs.recognize_path("/content/list"))
       assert_equal({:controller => "content", :action => 'show', :id => '10'}, rs.recognize_path("/content/show/10"))
@@ -769,6 +773,7 @@ def test_default_setup
     end
 
     def test_ignores_leading_slash
+      @rs.clear!
       @rs.draw {|m| m.connect '/:controller/:action/:id'}
       test_default_setup
     end
@@ -1002,6 +1007,8 @@ def test_named_route_with_regexps
     end
 
     def test_changing_controller
+      @rs.draw {|m| m.connect ':controller/:action/:id' }
+
       assert_equal '/admin/stuff/show/10', rs.generate(
         {:controller => 'stuff', :action => 'show', :id => 10},
         {:controller => 'admin/user', :action => 'index'}
@@ -1155,10 +1162,12 @@ def test_route_with_text_default
     end
 
     def test_action_expiry
+      @rs.draw {|m| m.connect ':controller/:action/:id' }
       assert_equal '/content', rs.generate({:controller => 'content'}, {:controller => 'content', :action => 'show'})
     end
 
     def test_recognition_with_uppercase_controller_name
+      @rs.draw {|m| m.connect ':controller/:action/:id' }
       assert_equal({:controller => "content", :action => 'index'}, rs.recognize_path("/Content"))
       assert_equal({:controller => "content", :action => 'list'}, rs.recognize_path("/ConTent/list"))
       assert_equal({:controller => "content", :action => 'show', :id => '10'}, rs.recognize_path("/CONTENT/show/10"))
@@ -2399,13 +2408,13 @@ class RouteLoadingTest < Test::Unit::TestCase
     def setup
       routes.instance_variable_set '@routes_last_modified', nil
       silence_warnings { Object.const_set :RAILS_ROOT, '.' }
-      ActionController::Routing::Routes.configuration_file = File.join(RAILS_ROOT, 'config', 'routes.rb')
+      routes.add_configuration_file(File.join(RAILS_ROOT, 'config', 'routes.rb'))
 
       @stat = stub_everything
     end
 
     def teardown
-      ActionController::Routing::Routes.configuration_file = nil
+      ActionController::Routing::Routes.configuration_files.clear
       Object.send :remove_const, :RAILS_ROOT
     end
 
@@ -2448,12 +2457,24 @@ def test_adding_inflections_forces_reload
     end
 
     def test_load_with_configuration
-      routes.configuration_file = "foobarbaz"
+      routes.configuration_files.clear
+      routes.add_configuration_file("foobarbaz")
       File.expects(:stat).returns(@stat)
       routes.expects(:load).with("foobarbaz")
 
       routes.reload
     end
+    
+    def test_load_multiple_configurations
+      routes.add_configuration_file("engines.rb")
+      
+      File.expects(:stat).at_least_once.returns(@stat)
+
+      routes.expects(:load).with('./config/routes.rb')
+      routes.expects(:load).with('engines.rb')
+
+      routes.reload
+    end
 
     private
       def routes