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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