Metal can now line in plugins under app/metal [#2045 state:committed]

Signed-off-by: David Heinemeier Hansson <david@loudthinking.com>

4 files changed, 21 insertions, 9 deletions

diff --git a/railties/lib/initializer.rb b/railties/lib/initializer.rb
index 09affe9e36..24ce3e75ff 100644
--- a/railties/lib/initializer.rb
+++ b/railties/lib/initializer.rb
@@ -559,6 +559,8 @@ Run `rake gems:install` to install the missing gems.
     end
 
     def initialize_metal
+      Rails::Rack::Metal.metal_paths += plugin_loader.engine_metal_paths
+
       configuration.middleware.insert_before(
         :"ActionController::RewindableInput",
         Rails::Rack::Metal, :if => Rails::Rack::Metal.metals.any?)
diff --git a/railties/lib/rails/plugin.rb b/railties/lib/rails/plugin.rb
index 4901abe808..80deb73bbb 100644
--- a/railties/lib/rails/plugin.rb
+++ b/railties/lib/rails/plugin.rb
@@ -80,6 +80,10 @@ module Rails
       File.join(directory, 'app', 'controllers')
     end
 
+    def metal_path
+      File.join(directory, 'app', 'metal')
+    end
+
     def routing_file
       File.join(directory, 'config', 'routes.rb')
     end
@@ -100,7 +104,7 @@ module Rails
 
       
       def app_paths
-        [ File.join(directory, 'app', 'models'), File.join(directory, 'app', 'helpers'), controller_path ]
+        [ File.join(directory, 'app', 'models'), File.join(directory, 'app', 'helpers'), controller_path, metal_path ]
       end
       
       def lib_path
@@ -160,4 +164,4 @@ module Rails
       File.join(directory, 'rails', 'init.rb')
     end
   end
-end
\ No newline at end of file
+end
diff --git a/railties/lib/rails/plugin/loader.rb b/railties/lib/rails/plugin/loader.rb
index f86589a689..66e01d70da 100644
--- a/railties/lib/rails/plugin/loader.rb
+++ b/railties/lib/rails/plugin/loader.rb
@@ -65,6 +65,9 @@ module Rails
         $LOAD_PATH.uniq!
       end
 
+      def engine_metal_paths
+        engines.collect(&:metal_path)
+      end
 
       protected
         def configure_engines
@@ -185,4 +188,4 @@ module Rails
 
     end
   end
-end
\ No newline at end of file
+end
diff --git a/railties/lib/rails/rack/metal.rb b/railties/lib/rails/rack/metal.rb
index b185227234..8dac992ef2 100644
--- a/railties/lib/rails/rack/metal.rb
+++ b/railties/lib/rails/rack/metal.rb
@@ -6,14 +6,17 @@ module Rails
       NotFoundResponse = [404, {}, []].freeze
       NotFound = lambda { NotFoundResponse }
 
+      cattr_accessor :metal_paths
+      self.metal_paths = ["#{Rails.root}/app/metal"]
+
       def self.metals
-        base = "#{Rails.root}/app/metal"
-        matcher = /\A#{Regexp.escape(base)}\/(.*)\.rb\Z/
+        matcher = /#{Regexp.escape('/app/metal/')}(.*)\.rb\Z/
+        metal_glob = metal_paths.map{ |base| "#{base}/**/*.rb" }
 
-        Dir["#{base}/**/*.rb"].sort.map do |file|
-          file.sub!(matcher, '\1')
-          require file
-          file.classify.constantize
+        Dir[*metal_glob].sort.map do |file|
+          path = file.match(matcher)[1]
+          require path
+          path.classify.constantize
         end
       end