diff options
Diffstat (limited to 'railties/lib/rails/engine.rb')
| -rw-r--r-- | railties/lib/rails/engine.rb | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/railties/lib/rails/engine.rb b/railties/lib/rails/engine.rb new file mode 100644 index 0000000000..e40052e0f1 --- /dev/null +++ b/railties/lib/rails/engine.rb @@ -0,0 +1,128 @@ +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 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 do |app| + ActiveSupport::Dependencies.load_paths.concat(config.load_paths) + + if reloadable?(app) + ActiveSupport::Dependencies.load_once_paths.concat(config.load_once_paths) + else + ActiveSupport::Dependencies.load_once_paths.concat(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 + paths.config.routes.to_a.each do |route| + Rails::Application::RoutesReloader.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 + + initializer :add_locales do + config.i18n.load_path.unshift(*paths.config.locales.to_a) + end + + initializer :add_view_paths do + views = paths.app.views.to_a + ActionController::Base.view_paths.concat(views) if defined?(ActionController) + ActionMailer::Base.view_paths.concat(views) if defined?(ActionMailer) + end + + initializer :add_metals do + Rails::Rack::Metal.paths.concat(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_plugins + end + end +end
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