Engine can now serve files with ActionDispatch::Static

4 files changed, 15 insertions, 5 deletions

diff --git a/railties/lib/rails/application/configuration.rb b/railties/lib/rails/application/configuration.rb
index a20208f8d5..14669f47b7 100644
--- a/railties/lib/rails/application/configuration.rb
+++ b/railties/lib/rails/application/configuration.rb
@@ -11,7 +11,7 @@ module Rails
                     :encoding, :consider_all_requests_local, :dependency_loading,
                     :filter_parameters,  :log_level, :logger,
                     :preload_frameworks, :reload_plugins,
-                    :secret_token, :serve_static_assets, :session_options,
+                    :secret_token, :session_options,
                     :time_zone, :whiny_nils
 
       def initialize(*)
diff --git a/railties/lib/rails/engine.rb b/railties/lib/rails/engine.rb
index c0607950b5..409502cb08 100644
--- a/railties/lib/rails/engine.rb
+++ b/railties/lib/rails/engine.rb
@@ -152,13 +152,22 @@ module Rails
     end
 
     def app
-      @app ||= config.middleware.build(endpoint)
+      @app ||= begin
+        config.middleware = config.middleware.merge_into(default_middleware_stack)
+        config.middleware.build(endpoint)
+      end
     end
 
     def endpoint
       self.class.endpoint || routes
     end
 
+    def default_middleware_stack
+      ActionDispatch::MiddlewareStack.new.tap do |middleware|
+        middleware.use ::ActionDispatch::Static, paths.public.to_a.first if config.serve_static_assets
+      end
+    end
+
     def call(env)
       app.call(env)
     end
diff --git a/railties/lib/rails/engine/configuration.rb b/railties/lib/rails/engine/configuration.rb
index 0c91796fc9..b1adbe1f22 100644
--- a/railties/lib/rails/engine/configuration.rb
+++ b/railties/lib/rails/engine/configuration.rb
@@ -5,12 +5,13 @@ module Rails
     class Configuration < ::Rails::Railtie::Configuration
       attr_reader :root
       attr_writer :eager_load_paths, :autoload_once_paths, :autoload_paths
-      attr_accessor :middleware, :plugins
+      attr_accessor :middleware, :plugins, :serve_static_assets
 
       def initialize(root=nil)
         super()
         @root = root
-        @middleware = ActionDispatch::MiddlewareStack.new
+        @serve_static_assets = true
+        @middleware = Rails::Configuration::MiddlewareStackProxy.new
       end
 
       def paths
diff --git a/railties/lib/rails/railtie/configuration.rb b/railties/lib/rails/railtie/configuration.rb
index 4e6f94c534..96d9bd0da2 100644
--- a/railties/lib/rails/railtie/configuration.rb
+++ b/railties/lib/rails/railtie/configuration.rb
@@ -78,4 +78,4 @@ module Rails
       end
     end
   end
-end
\ No newline at end of file
+end