Shift more responsibility from application class to its singleton instance. Treat instantiation and boot as separate steps. Use app.config rather than app.configuration.

7 files changed, 56 insertions, 87 deletions

diff --git a/actionpack/lib/action_dispatch/routing/route_set.rb b/actionpack/lib/action_dispatch/routing/route_set.rb
index a4dc5e0956..498ad3268c 100644
--- a/actionpack/lib/action_dispatch/routing/route_set.rb
+++ b/actionpack/lib/action_dispatch/routing/route_set.rb
@@ -273,7 +273,7 @@ module ActionDispatch
         # TODO: Move this into Railties
         if defined?(Rails.application)
           # Find namespaces in controllers/ directory
-          Rails.application.configuration.controller_paths.each do |load_path|
+          Rails.application.config.controller_paths.each do |load_path|
             load_path = File.expand_path(load_path)
             Dir["#{load_path}/**/*_controller.rb"].collect do |path|
               namespaces << File.dirname(path).sub(/#{load_path}\/?/, '')
diff --git a/railties/lib/rails/application.rb b/railties/lib/rails/application.rb
index d7a89ba2be..c594b8a31d 100644
--- a/railties/lib/rails/application.rb
+++ b/railties/lib/rails/application.rb
@@ -1,21 +1,17 @@
+require 'active_support/core_ext/module/delegation'
+
 module Rails
   class Application
     include Initializable
 
     class << self
-      # Stub out App initialize
-      def initialize!
-        new
-      end
+      attr_writer :config
+      alias configure class_eval
+      delegate :initialize!, :load_tasks, :to => :instance
 
-      def new
-        @instance ||= begin
-          begin
-            require config.environment_path
-          rescue LoadError
-          end
-          super
-        end
+      private :new
+      def instance
+        @instance ||= new
       end
 
       def config
@@ -26,66 +22,29 @@ module Rails
         end
       end
 
-      # TODO: change the plugin loader to use config
-      alias configuration config
-
-      def config=(config)
-        @config = config
-      end
-
-      def root
-        config.root
-      end
-
-      def load_tasks
-        require "rails/tasks"
-        Dir["#{root}/vendor/plugins/*/**/tasks/**/*.rake"].sort.each { |ext| load ext }
-        Dir["#{root}/lib/tasks/**/*.rake"].sort.each { |ext| load ext }
-        task :environment do
-          $rails_rake_task = true
-          initialize!
-        end
-      end
-
       def routes
         ActionController::Routing::Routes
       end
-
-      def call(env)
-        new.call(env)
-      end
     end
 
+    delegate :config, :routes, :to => :'self.class'
+    delegate :root, :middleware, :to => :config
     attr_reader :route_configuration_files
 
     def initialize
+      require_environment
       Rails.application ||= self
-
       @route_configuration_files = []
-
-      run_initializers(self)
-    end
-
-    def config
-      self.class.config
-    end
-
-    class << self
-      alias configure class_eval
-    end
-
-    def root
-      config.root
     end
 
-    alias configuration config
-
-    def middleware
-      config.middleware
+    def initialize!
+      run_initializers(self)
+      self
     end
 
-    def routes
-      ActionController::Routing::Routes
+    def require_environment
+      require config.environment_path
+    rescue LoadError
     end
 
     def routes_changed_at
@@ -114,6 +73,16 @@ module Rails
       routes.disable_clear_and_finalize = false
     end
 
+    def load_tasks
+      require "rails/tasks"
+      Dir["#{root}/vendor/plugins/*/**/tasks/**/*.rake"].sort.each { |ext| load ext }
+      Dir["#{root}/lib/tasks/**/*.rake"].sort.each { |ext| load ext }
+      task :environment do
+        $rails_rake_task = true
+        initialize!
+      end
+    end
+
     def initializers
       initializers = super
       plugins.each { |p| initializers += p.initializers }
@@ -170,7 +139,7 @@ module Rails
     # Create tmp directories
     initializer :ensure_tmp_directories_exist do
       %w(cache pids sessions sockets).each do |dir_to_make|
-        FileUtils.mkdir_p(File.join(config.root, 'tmp', dir_to_make))
+        FileUtils.mkdir_p(File.join(root, 'tmp', dir_to_make))
       end
     end
 
@@ -361,28 +330,28 @@ module Rails
     # # already called abort() unless $gems_rake_task is set
     # return unless gems_dependencies_loaded
     initializer :load_application_initializers do
-      Dir["#{configuration.root}/config/initializers/**/*.rb"].sort.each do |initializer|
+      Dir["#{root}/config/initializers/**/*.rb"].sort.each do |initializer|
         load(initializer)
       end
     end
 
     # Fires the user-supplied after_initialize block (Configuration#after_initialize)
     initializer :after_initialize do
-      configuration.after_initialize_blocks.each do |block|
+      config.after_initialize_blocks.each do |block|
         block.call
       end
     end
 
     # # Setup database middleware after initializers have run
     initializer :initialize_database_middleware do
-      if configuration.frameworks.include?(:active_record)
-        if configuration.frameworks.include?(:action_controller) && ActionController::Base.session_store &&
+      if config.frameworks.include?(:active_record)
+        if config.frameworks.include?(:action_controller) && ActionController::Base.session_store &&
             ActionController::Base.session_store.name == 'ActiveRecord::SessionStore'
-          configuration.middleware.insert_before :"ActiveRecord::SessionStore", ActiveRecord::ConnectionAdapters::ConnectionManagement
-          configuration.middleware.insert_before :"ActiveRecord::SessionStore", ActiveRecord::QueryCache
+          config.middleware.insert_before :"ActiveRecord::SessionStore", ActiveRecord::ConnectionAdapters::ConnectionManagement
+          config.middleware.insert_before :"ActiveRecord::SessionStore", ActiveRecord::QueryCache
         else
-          configuration.middleware.use ActiveRecord::ConnectionAdapters::ConnectionManagement
-          configuration.middleware.use ActiveRecord::QueryCache
+          config.middleware.use ActiveRecord::ConnectionAdapters::ConnectionManagement
+          config.middleware.use ActiveRecord::QueryCache
         end
       end
     end
@@ -391,11 +360,11 @@ module Rails
 
     # # Prepare dispatcher callbacks and run 'prepare' callbacks
     initializer :prepare_dispatcher do
-      next unless configuration.frameworks.include?(:action_controller)
+      next unless config.frameworks.include?(:action_controller)
       require 'rails/dispatcher' unless defined?(::Dispatcher)
-      Dispatcher.define_dispatcher_callbacks(configuration.cache_classes)
+      Dispatcher.define_dispatcher_callbacks(config.cache_classes)
 
-      unless configuration.cache_classes
+      unless config.cache_classes
         # Setup dev mode route reloading
         routes_last_modified = routes_changed_at
         reload_routes = lambda do
@@ -414,15 +383,15 @@ module Rails
     # this does nothing. Otherwise, it loads the routing definitions and sets up
     # loading module used to lazily load controllers (Configuration#controller_paths).
     initializer :initialize_routing do
-      next unless configuration.frameworks.include?(:action_controller)
-      route_configuration_files << configuration.routes_configuration_file
-      route_configuration_files << configuration.builtin_routes_configuration_file
+      next unless config.frameworks.include?(:action_controller)
+      route_configuration_files << config.routes_configuration_file
+      route_configuration_files << config.builtin_routes_configuration_file
       reload_routes!
     end
     #
     # # Observers are loaded after plugins in case Observers or observed models are modified by plugins.
     initializer :load_observers do
-      if configuration.frameworks.include?(:active_record)
+      if config.frameworks.include?(:active_record)
         ActiveRecord::Base.instantiate_observers
       end
     end
@@ -431,8 +400,8 @@ module Rails
     initializer :load_application_classes do
       next if $rails_rake_task
 
-      if configuration.cache_classes
-        configuration.eager_load_paths.each do |load_path|
+      if 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')
@@ -443,7 +412,7 @@ module Rails
 
     # Disable dependency loading during request cycle
     initializer :disable_dependency_loading do
-      if configuration.cache_classes && !configuration.dependency_loading
+      if config.cache_classes && !config.dependency_loading
         ActiveSupport::Dependencies.unhook!
       end
     end
diff --git a/railties/lib/rails/commands/server.rb b/railties/lib/rails/commands/server.rb
index 3687b4460e..57b7c6a49c 100644
--- a/railties/lib/rails/commands/server.rb
+++ b/railties/lib/rails/commands/server.rb
@@ -41,9 +41,9 @@ module Rails
       new(app).start
     end
 
-    def initialize(app_const)
+    def initialize(app)
       super() # Call Rack::Server#initialize without passing any options to use.
-      @app_const = app_const
+      @app = app
     end
 
     def start
@@ -69,7 +69,7 @@ module Rails
     end
 
     def log_path
-      "#{File.expand_path(@app_const.root)}/log/#{options[:environment]}.log"
+      "#{File.expand_path(@app.root)}/log/#{options[:environment]}.log"
     end
 
     def default_options
@@ -77,10 +77,10 @@ module Rails
         :Port        => 3000,
         :Host        => "0.0.0.0",
         :environment => (ENV['RAILS_ENV'] || "development").dup,
-        :rack_file   => "#{@app_const.root}/config.ru",
+        :rack_file   => "#{@app.root}/config.ru",
         :daemonize   => false,
         :debugger    => false,
-        :pid         => "#{@app_const.root}/tmp/pids/server.pid",
+        :pid         => "#{@app.root}/tmp/pids/server.pid",
         :AccessLog   => []
       }
     end
diff --git a/railties/lib/rails/generators/rails/app/templates/config.ru b/railties/lib/rails/generators/rails/app/templates/config.ru
index f3bf3d6117..acb8435446 100644
--- a/railties/lib/rails/generators/rails/app/templates/config.ru
+++ b/railties/lib/rails/generators/rails/app/templates/config.ru
@@ -2,4 +2,4 @@
 require ::File.expand_path('../config/environment',  __FILE__)
 
 # Dispatch the request
-run <%= app_const%>
+run <%= app_const %>.instance
diff --git a/railties/lib/rails/generators/rails/app/templates/script/console.tt b/railties/lib/rails/generators/rails/app/templates/script/console.tt
index 4262439e52..9ddd4cfe62 100755
--- a/railties/lib/rails/generators/rails/app/templates/script/console.tt
+++ b/railties/lib/rails/generators/rails/app/templates/script/console.tt
@@ -1,3 +1,3 @@
 require File.expand_path('../../config/application',  __FILE__)
 require 'rails/commands/console'
-Rails::Console.start(<%= app_const %>)
+Rails::Console.start(<%= app_const %>.instance)
diff --git a/railties/lib/rails/generators/rails/app/templates/script/dbconsole.tt b/railties/lib/rails/generators/rails/app/templates/script/dbconsole.tt
index 9dfa24c378..96e0bc191b 100755
--- a/railties/lib/rails/generators/rails/app/templates/script/dbconsole.tt
+++ b/railties/lib/rails/generators/rails/app/templates/script/dbconsole.tt
@@ -1,3 +1,3 @@
 require File.expand_path('../../config/application',  __FILE__)
 require 'rails/commands/dbconsole'
-Rails::DBConsole.start(<%= app_const %>)
\ No newline at end of file
+Rails::DBConsole.start(<%= app_const %>.instance)
diff --git a/railties/lib/rails/generators/rails/app/templates/script/server.tt b/railties/lib/rails/generators/rails/app/templates/script/server.tt
index d98f677475..380dc42cb5 100755
--- a/railties/lib/rails/generators/rails/app/templates/script/server.tt
+++ b/railties/lib/rails/generators/rails/app/templates/script/server.tt
@@ -1,3 +1,3 @@
 require File.expand_path('../../config/application',  __FILE__)
 require 'rails/commands/server'
-Rails::Server.start(<%= app_const %>)
+Rails::Server.start(<%= app_const %>.instance)