module Rails class Application module Finisher include Initializable initializer :add_generator_templates do config.generators.templates.unshift(*paths["lib/templates"].existent) end initializer :ensure_autoload_once_paths_as_subset do extra = ActiveSupport::Dependencies.autoload_once_paths - ActiveSupport::Dependencies.autoload_paths unless extra.empty? abort <<-end_error autoload_once_paths must be a subset of the autoload_paths. Extra items in autoload_once_paths: #{extra * ','} end_error end end initializer :add_builtin_route do |app| if Rails.env.development? app.routes.prepend do get "/rails/info/properties" => "rails/info#properties", internal: true get "/rails/info/routes" => "rails/info#routes", internal: true get "/rails/info" => "rails/info#index", internal: true end app.routes.append do get "/" => "rails/welcome#index", internal: true end end end # Setup default session store if not already set in config/application.rb initializer :setup_default_session_store, before: :build_middleware_stack do |app| unless app.config.session_store? app_name = app.class.name ? app.railtie_name.chomp("_application") : "" app.config.session_store :cookie_store, key: "_#{app_name}_session" end end initializer :build_middleware_stack do build_middleware_stack end initializer :define_main_app_helper do |app| app.routes.define_mounted_helper(:main_app) end initializer :add_to_prepare_blocks do |app| config.to_prepare_blocks.each do |block| app.reloader.to_prepare(&block) end end # This needs to happen before eager load so it happens # in exactly the same point regardless of config.cache_classes initializer :run_prepare_callbacks do |app| app.reloader.prepare! end initializer :eager_load! do if config.eager_load ActiveSupport.run_load_hooks(:before_eager_load, self) config.eager_load_namespaces.each(&:eager_load!) end end # All initialization is done, including eager loading in production initializer :finisher_hook do ActiveSupport.run_load_hooks(:after_initialize, self) end class MutexHook def initialize(mutex = Mutex.new) @mutex = mutex end def run @mutex.lock end def complete(_state) @mutex.unlock end end module InterlockHook def self.run ActiveSupport::Dependencies.interlock.start_running end def self.complete(_state) ActiveSupport::Dependencies.interlock.done_running end end initializer :configure_executor_for_concurrency do |app| if config.allow_concurrency == false # User has explicitly opted out of concurrent request # handling: presumably their code is not threadsafe app.executor.register_hook(MutexHook.new, outer: true) elsif config.allow_concurrency == :unsafe # Do nothing, even if we know this is dangerous. This is the # historical behavior for true. else # Default concurrency setting: enabled, but safe unless config.cache_classes && config.eager_load # Without cache_classes + eager_load, the load interlock # is required for proper operation app.executor.register_hook(InterlockHook, outer: true) end end end # Set routes reload after the finisher hook to ensure routes added in # the hook are taken into account. initializer :set_routes_reloader_hook do |app| reloader = routes_reloader reloader.execute_if_updated reloaders << reloader app.reloader.to_run do # We configure #execute rather than #execute_if_updated because if # autoloaded constants are cleared we need to reload routes also in # case any was used there, as in # # mount MailPreview => 'mail_view' # # This means routes are also reloaded if i18n is updated, which # might not be necessary, but in order to be more precise we need # some sort of reloaders dependency support, to be added. require_unload_lock! reloader.execute end end # Set clearing dependencies after the finisher hook to ensure paths # added in the hook are taken into account. initializer :set_clear_dependencies_hook, group: :all do |app| callback = lambda do ActiveSupport::DescendantsTracker.clear ActiveSupport::Dependencies.clear end if config.cache_classes app.reloader.check = lambda { false } elsif config.reload_classes_only_on_change app.reloader.check = lambda do app.reloaders.map(&:updated?).any? end else app.reloader.check = lambda { true } end if config.reload_classes_only_on_change reloader = config.file_watcher.new(*watchable_args, &callback) reloaders << reloader # Prepend this callback to have autoloaded constants cleared before # any other possible reloading, in case they need to autoload fresh # constants. app.reloader.to_run(prepend: true) do # In addition to changes detected by the file watcher, if routes # or i18n have been updated we also need to clear constants, # that's why we run #execute rather than #execute_if_updated, this # callback has to clear autoloaded constants after any update. class_unload! do reloader.execute end end else app.reloader.to_complete do class_unload!(&callback) end end end # Disable dependency loading during request cycle initializer :disable_dependency_loading do if config.eager_load && config.cache_classes && !config.enable_dependency_loading ActiveSupport::Dependencies.unhook! end end end end end