require 'active_support/core_ext/module/delegation' require 'rails/railtie' module Rails class Engine < Railtie autoload :Configurable, "rails/engine/configurable" autoload :Configuration, "rails/engine/configuration" class << self attr_accessor :called_from alias :engine_name :railtie_name alias :engine_names :railtie_names def inherited(base) unless abstract_railtie?(base) base.called_from = begin call_stack = caller.map { |p| p.split(':').first } File.dirname(call_stack.detect { |p| p !~ %r[railties/lib/rails|rack/lib/rack] }) end end super end def find_root_with_flag(flag, default=nil) root_path = self.called_from while root_path && File.directory?(root_path) && !File.exist?("#{root_path}/#{flag}") parent = File.dirname(root_path) root_path = parent != root_path && parent end root = File.exist?("#{root_path}/#{flag}") ? root_path : default raise "Could not find root path for #{self}" unless root RUBY_PLATFORM =~ /(:?mswin|mingw)/ ? Pathname.new(root).expand_path : Pathname.new(root).realpath end end delegate :middleware, :paths, :root, :to => :config def load_tasks super config.paths.lib.tasks.to_a.sort.each { |ext| load(ext) } end # Add configured load paths to ruby load paths and remove duplicates. initializer :set_load_path, :before => :bootstrap_load_path do config.load_paths.reverse_each do |path| $LOAD_PATH.unshift(path) if File.directory?(path) end $LOAD_PATH.uniq! end # Set the paths from which Rails will automatically load source files, # and the load_once paths. initializer :set_autoload_paths, :before => :bootstrap_load_path do |app| ActiveSupport::Dependencies.load_paths.unshift(*config.load_paths) if reloadable?(app) ActiveSupport::Dependencies.load_once_paths.unshift(*config.load_once_paths) else ActiveSupport::Dependencies.load_once_paths.unshift(*config.load_paths) end # Freeze so future modifications will fail rather than do nothing mysteriously config.load_paths.freeze config.load_once_paths.freeze end initializer :add_routing_paths do |app| paths.config.routes.to_a.each do |route| app.routes_reloader.paths.unshift(route) if File.exists?(route) end end initializer :add_routing_namespaces do |app| paths.app.controllers.to_a.each do |load_path| load_path = File.expand_path(load_path) Dir["#{load_path}/*/*_controller.rb"].collect do |path| namespace = File.dirname(path).sub(/#{load_path}\/?/, '') app.routes.controller_namespaces << namespace unless namespace.empty? end end end # I18n load paths are a special case since the ones added # later have higher priority. initializer :add_locales do config.i18n.engines_load_path.concat(paths.config.locales.to_a) end initializer :add_view_paths do views = paths.app.views.to_a ActionController::Base.view_paths.unshift(*views) if defined?(ActionController) ActionMailer::Base.view_paths.unshift(*views) if defined?(ActionMailer) end initializer :add_metals do |app| app.metal_loader.paths.unshift(*paths.app.metals.to_a) end initializer :load_application_initializers do paths.config.initializers.to_a.sort.each do |initializer| load(initializer) end end initializer :load_application_classes 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 end protected def reloadable?(app) app.config.reload_engines end end end