Rails::Engine.find(path) - method to find engine by path

3 files changed, 15 insertions, 8 deletions

diff --git a/railties/lib/rails/application/railties.rb b/railties/lib/rails/application/railties.rb
index c1d2de571f..4fc5e92837 100644
--- a/railties/lib/rails/application/railties.rb
+++ b/railties/lib/rails/application/railties.rb
@@ -8,14 +8,6 @@ module Rails
         @all.each(&block) if block
         @all
       end
-
-      def railties
-        @railties ||= ::Rails::Railtie.subclasses.map(&:instance)
-      end
-
-      def engines
-        @engines ||= ::Rails::Engine.subclasses.map(&:instance)
-      end
     end
   end
 end
diff --git a/railties/lib/rails/engine.rb b/railties/lib/rails/engine.rb
index 85fa4424c4..b188fdfca1 100644
--- a/railties/lib/rails/engine.rb
+++ b/railties/lib/rails/engine.rb
@@ -371,6 +371,11 @@ module Rails
          end
         end
       end
+
+      # Finds engine with given path
+      def find(path)
+        Rails::Engine::Railties.engines.find { |r| File.expand_path(r.root.to_s) == File.expand_path(path.to_s) }
+      end
     end
 
     delegate :middleware, :root, :paths, :to => :config
diff --git a/railties/lib/rails/engine/railties.rb b/railties/lib/rails/engine/railties.rb
index e91bdbf1e5..d5ecd2e48d 100644
--- a/railties/lib/rails/engine/railties.rb
+++ b/railties/lib/rails/engine/railties.rb
@@ -18,6 +18,16 @@ module Rails
           Plugin.all(plugin_names, @config.paths["vendor/plugins"].existent)
         end
       end
+
+      def self.railties
+        @railties ||= ::Rails::Railtie.subclasses.map(&:instance)
+      end
+
+      def self.engines
+        @engines ||= ::Rails::Engine.subclasses.map(&:instance)
+      end
+
+      delegate :railties, :engines, :to => "self.class"
     end
   end
 end