Expose remaining hooks to minimize the need for a Railtie based on feedback from plugin developers.

railties/lib/rails/application.rb

@@ -69,7 +69,6 @@ def inherited(base)
         raise "You cannot have more than one Rails::Application" if Rails.application
         super
         Rails.application = base.instance
-
         ActiveSupport.run_load_hooks(:before_configuration, base.instance)
       end
 

railties/lib/rails/application/finisher.rb

@@ -37,6 +37,7 @@ module Finisher
 
       initializer :eager_load! do
         if config.cache_classes && !$rails_rake_task
+          ActiveSupport.run_load_hooks(:before_eager_load, self)
           railties.all(&:eager_load!)
         end
       end

railties/lib/rails/railtie/configuration.rb

@@ -68,6 +68,18 @@ def generators
         end
       end
 
+      def before_configuration(&block)
+        ActiveSupport.on_load(:before_configuration, :yield => true, &block)
+      end
+
+      def before_eager_load(&block)
+        ActiveSupport.on_load(:before_eager_load, :yield => true, &block)
+      end
+
+      def before_initialize(&block)
+        ActiveSupport.on_load(:before_initialize, :yield => true, &block)
+      end
+
       def after_initialize(&block)
         ActiveSupport.on_load(:after_initialize, :yield => true, &block)
       end

railties/test/application/initializers/initializers_test.rb → railties/test/application/initializers/hooks_test.rb

@@ -16,16 +16,34 @@ def setup
       assert $foo
     end
 
-    test "after_initialize block works correctly" do
+    test "hooks block works correctly without cache classes (before_eager_load is not called)" do
       add_to_config <<-RUBY
+        $initialization_callbacks = []
         config.root = "#{app_path}"
-        config.after_initialize { $test_after_initialize_block1 = "success" }
-        config.after_initialize { $test_after_initialize_block2 = "congratulations" }
+        config.cache_classes = false
+        config.before_configuration { $initialization_callbacks << 1 }
+        config.before_initialize    { $initialization_callbacks << 2 }
+        config.before_eager_load    { Boom }
+        config.after_initialize     { $initialization_callbacks << 3 }
       RUBY
+
       require "#{app_path}/config/environment"
+      assert_equal [1,2,3], $initialization_callbacks
+    end
 
-      assert_equal "success", $test_after_initialize_block1
-      assert_equal "congratulations", $test_after_initialize_block2
+    test "hooks block works correctly with cache classes" do
+      add_to_config <<-RUBY
+        $initialization_callbacks = []
+        config.root = "#{app_path}"
+        config.cache_classes = true
+        config.before_configuration { $initialization_callbacks << 1 }
+        config.before_initialize    { $initialization_callbacks << 2 }
+        config.before_eager_load    { $initialization_callbacks << 3 }
+        config.after_initialize     { $initialization_callbacks << 4 }
+      RUBY
+
+      require "#{app_path}/config/environment"
+      assert_equal [1,2,3,4], $initialization_callbacks
     end
 
     test "after_initialize runs after frameworks have been initialized" do