Ensure that eager_load actually takes place just after the middleware stack is built by using another pattern.

Also create a engine_blank_point initializer to ensure any :before or :after hooks defined inside engines won't move the configuration initializers to other places.

Author: josevalim

railties/lib/rails/application/finisher.rb

@@ -35,8 +35,14 @@ module Finisher
         app
       end
 
-      initializer :finisher_hook do |app|
-        ActiveSupport.run_load_hooks(:after_initialize, app)
+      initializer :eager_load! do
+        if config.cache_classes && !$rails_rake_task
+          railties.all(&:eager_load!)
+        end
+      end
+
+      initializer :finisher_hook do
+        ActiveSupport.run_load_hooks(:after_initialize, self)
       end
 
       # Disable dependency loading during request cycle

railties/lib/rails/engine.rb

@@ -132,6 +132,15 @@ def load_tasks
       config.paths.lib.tasks.to_a.sort.each { |ext| load(ext) }
     end
 
+    def eager_load!
+      config.eager_load_paths.each do |load_path|
+        matcher = /\A#{Regexp.escape(load_path)}\/(.*)\.rb\Z/
+        Dir.glob("#{load_path}/**/*.rb").sort.each do |file|
+          require_dependency file.sub(matcher, '\1')
+        end
+      end
+    end
+
     # Add configured load paths to ruby load paths and remove duplicates.
     initializer :set_load_path, :before => :bootstrap_hook do
       config.load_paths.reverse_each do |path|
@@ -203,19 +212,9 @@ def load_tasks
       end
     end
 
-    # This needs to be an initializer, since it needs to run once
-    # per engine and get the engine as a block parameter
-    initializer :load_app_classes, :before => :finisher_hook do |app|
-      next if $rails_rake_task
-
-      if app.config.cache_classes
-        config.eager_load_paths.each do |load_path|
-          matcher = /\A#{Regexp.escape(load_path)}\/(.*)\.rb\Z/
-          Dir.glob("#{load_path}/**/*.rb").sort.each do |file|
-            require_dependency file.sub(matcher, '\1')
-          end
-        end
-      end
+    initializer :engines_blank_point do
+      # We need this initializer so all extra initializers added in engines are
+      # consistently executed after all the initializers above across all engines.
     end
 
   protected

railties/lib/rails/railtie.rb

@@ -197,6 +197,9 @@ def abstract_railtie?
       end
     end
 
+    def eager_load!
+    end
+
     def rake_tasks
       self.class.rake_tasks
     end

railties/test/railties/engine_test.rb

@@ -28,5 +28,31 @@ def reload_config
       boot_rails
       assert !Rails::Engine.respond_to?(:config)
     end
+
+    test "initializers are executed after application configuration initializers" do
+      @plugin.write "lib/bukkits.rb", <<-RUBY
+        class Bukkits
+          class Engine < ::Rails::Engine
+            initializer "dummy_initializer" do
+            end
+          end
+        end
+      RUBY
+
+      boot_rails
+
+      initializers = Rails.application.initializers
+      index        = initializers.index { |i| i.name == "dummy_initializer" }
+      selection    = initializers[(index-3)..(index)].map(&:name).map(&:to_s)
+
+      assert_equal %w(
+       load_config_initializers
+       load_config_initializers
+       engines_blank_point
+       dummy_initializer
+      ), selection
+
+      assert index < initializers.index { |i| i.name == :build_middleware_stack }
+    end
   end
 end