130 lines
4.0 KiB
Ruby
130 lines
4.0 KiB
Ruby
require 'active_support/core_ext/module/delegation'
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require 'rails/railtie'
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module Rails
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class Engine < Railtie
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autoload :Configurable, "rails/engine/configurable"
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autoload :Configuration, "rails/engine/configuration"
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class << self
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attr_accessor :called_from
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alias :engine_name :railtie_name
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alias :engine_names :railtie_names
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def inherited(base)
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unless abstract_railtie?(base)
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base.called_from = begin
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call_stack = caller.map { |p| p.split(':').first }
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File.dirname(call_stack.detect { |p| p !~ %r[railties/lib/rails|rack/lib/rack] })
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end
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end
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super
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end
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def find_root_with_flag(flag, default=nil)
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root_path = self.called_from
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while root_path && File.directory?(root_path) && !File.exist?("#{root_path}/#{flag}")
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parent = File.dirname(root_path)
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root_path = parent != root_path && parent
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end
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root = File.exist?("#{root_path}/#{flag}") ? root_path : default
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raise "Could not find root path for #{self}" unless root
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RUBY_PLATFORM =~ /(:?mswin|mingw)/ ?
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Pathname.new(root).expand_path : Pathname.new(root).realpath
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end
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end
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delegate :middleware, :paths, :root, :to => :config
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def load_tasks
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super
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config.paths.lib.tasks.to_a.sort.each { |ext| load(ext) }
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end
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# Add configured load paths to ruby load paths and remove duplicates.
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initializer :set_load_path, :before => :bootstrap_load_path do
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config.load_paths.reverse_each do |path|
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$LOAD_PATH.unshift(path) if File.directory?(path)
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end
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$LOAD_PATH.uniq!
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end
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# Set the paths from which Rails will automatically load source files,
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# and the load_once paths.
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initializer :set_autoload_paths, :before => :bootstrap_load_path do |app|
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ActiveSupport::Dependencies.load_paths.unshift(*config.load_paths)
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if reloadable?(app)
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ActiveSupport::Dependencies.load_once_paths.unshift(*config.load_once_paths)
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else
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ActiveSupport::Dependencies.load_once_paths.unshift(*config.load_paths)
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end
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# Freeze so future modifications will fail rather than do nothing mysteriously
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config.load_paths.freeze
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config.load_once_paths.freeze
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end
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initializer :add_routing_paths do |app|
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paths.config.routes.to_a.each do |route|
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app.routes_reloader.paths.unshift(route) if File.exists?(route)
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end
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end
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initializer :add_routing_namespaces do |app|
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paths.app.controllers.to_a.each do |load_path|
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load_path = File.expand_path(load_path)
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Dir["#{load_path}/*/*_controller.rb"].collect do |path|
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namespace = File.dirname(path).sub(/#{load_path}\/?/, '')
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app.routes.controller_namespaces << namespace unless namespace.empty?
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end
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end
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end
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# I18n load paths are a special case since the ones added
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# later have higher priority.
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initializer :add_locales do
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config.i18n.engines_load_path.concat(paths.config.locales.to_a)
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end
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initializer :add_view_paths do
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views = paths.app.views.to_a
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ActionController::Base.view_paths.unshift(*views) if defined?(ActionController)
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ActionMailer::Base.view_paths.unshift(*views) if defined?(ActionMailer)
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end
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initializer :add_metals do |app|
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app.metal_loader.paths.unshift(*paths.app.metals.to_a)
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end
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initializer :load_application_initializers do
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paths.config.initializers.to_a.sort.each do |initializer|
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load(initializer)
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end
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end
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initializer :load_application_classes do |app|
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next if $rails_rake_task
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if app.config.cache_classes
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config.eager_load_paths.each do |load_path|
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matcher = /\A#{Regexp.escape(load_path)}\/(.*)\.rb\Z/
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Dir.glob("#{load_path}/**/*.rb").sort.each do |file|
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require_dependency file.sub(matcher, '\1')
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end
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end
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end
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end
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protected
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def reloadable?(app)
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app.config.reload_engines
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end
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end
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end |