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435e8d719c
When copying migrations some engines might depend on schema from other engine so we can't blindly reverse all railties collection as that would affect the order they were originally loaded. This patch helps to only apply the order from engines specified in `railties_order`
515 lines
17 KiB
Ruby
515 lines
17 KiB
Ruby
require 'fileutils'
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require 'active_support/core_ext/hash/keys'
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require 'active_support/core_ext/object/blank'
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require 'active_support/key_generator'
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require 'active_support/message_verifier'
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require 'rails/engine'
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module Rails
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# In Rails 3.0, a Rails::Application object was introduced which is nothing more than
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# an Engine but with the responsibility of coordinating the whole boot process.
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#
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# == Initialization
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#
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# Rails::Application is responsible for executing all railties and engines
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# initializers. It also executes some bootstrap initializers (check
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# Rails::Application::Bootstrap) and finishing initializers, after all the others
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# are executed (check Rails::Application::Finisher).
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#
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# == Configuration
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#
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# Besides providing the same configuration as Rails::Engine and Rails::Railtie,
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# the application object has several specific configurations, for example
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# "cache_classes", "consider_all_requests_local", "filter_parameters",
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# "logger" and so forth.
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#
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# Check Rails::Application::Configuration to see them all.
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#
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# == Routes
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#
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# The application object is also responsible for holding the routes and reloading routes
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# whenever the files change in development.
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#
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# == Middlewares
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#
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# The Application is also responsible for building the middleware stack.
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#
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# == Booting process
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#
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# The application is also responsible for setting up and executing the booting
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# process. From the moment you require "config/application.rb" in your app,
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# the booting process goes like this:
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#
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# 1) require "config/boot.rb" to setup load paths
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# 2) require railties and engines
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# 3) Define Rails.application as "class MyApp::Application < Rails::Application"
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# 4) Run config.before_configuration callbacks
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# 5) Load config/environments/ENV.rb
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# 6) Run config.before_initialize callbacks
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# 7) Run Railtie#initializer defined by railties, engines and application.
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# One by one, each engine sets up its load paths, routes and runs its config/initializers/* files.
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# 8) Custom Railtie#initializers added by railties, engines and applications are executed
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# 9) Build the middleware stack and run to_prepare callbacks
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# 10) Run config.before_eager_load and eager_load! if eager_load is true
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# 11) Run config.after_initialize callbacks
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#
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# == Multiple Applications
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#
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# If you decide to define multiple applications, then the first application
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# that is initialized will be set to +Rails.application+, unless you override
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# it with a different application.
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#
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# To create a new application, you can instantiate a new instance of a class
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# that has already been created:
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#
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# class Application < Rails::Application
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# end
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#
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# first_application = Application.new
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# second_application = Application.new(config: first_application.config)
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#
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# In the above example, the configuration from the first application was used
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# to initialize the second application. You can also use the +initialize_copy+
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# on one of the applications to create a copy of the application which shares
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# the configuration.
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#
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# If you decide to define rake tasks, runners, or initializers in an
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# application other than +Rails.application+, then you must run those
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# these manually.
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class Application < Engine
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autoload :Bootstrap, 'rails/application/bootstrap'
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autoload :Configuration, 'rails/application/configuration'
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autoload :DefaultMiddlewareStack, 'rails/application/default_middleware_stack'
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autoload :Finisher, 'rails/application/finisher'
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autoload :Railties, 'rails/engine/railties'
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autoload :RoutesReloader, 'rails/application/routes_reloader'
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class << self
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def inherited(base)
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super
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Rails.app_class = base
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end
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def instance
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super.run_load_hooks!
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end
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def create(initial_variable_values = {}, &block)
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new(initial_variable_values, &block).run_load_hooks!
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end
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# Makes the +new+ method public.
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#
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# Note that Rails::Application inherits from Rails::Engine, which
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# inherits from Rails::Railtie and the +new+ method on Rails::Railtie is
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# private
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public :new
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end
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attr_accessor :assets, :sandbox
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alias_method :sandbox?, :sandbox
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attr_reader :reloaders
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delegate :default_url_options, :default_url_options=, to: :routes
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INITIAL_VARIABLES = [:config, :railties, :routes_reloader, :reloaders,
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:routes, :helpers, :app_env_config, :secrets] # :nodoc:
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def initialize(initial_variable_values = {}, &block)
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super()
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@initialized = false
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@reloaders = []
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@routes_reloader = nil
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@app_env_config = nil
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@ordered_railties = nil
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@railties = nil
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@message_verifiers = {}
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@ran_load_hooks = false
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# are these actually used?
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@initial_variable_values = initial_variable_values
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@block = block
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add_lib_to_load_path!
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end
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# Returns true if the application is initialized.
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def initialized?
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@initialized
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end
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def run_load_hooks! # :nodoc:
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return self if @ran_load_hooks
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@ran_load_hooks = true
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ActiveSupport.run_load_hooks(:before_configuration, self)
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@initial_variable_values.each do |variable_name, value|
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if INITIAL_VARIABLES.include?(variable_name)
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instance_variable_set("@#{variable_name}", value)
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end
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end
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instance_eval(&@block) if @block
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self
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end
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# Implements call according to the Rack API. It simply
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# dispatches the request to the underlying middleware stack.
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def call(env)
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env["ORIGINAL_FULLPATH"] = build_original_fullpath(env)
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env["ORIGINAL_SCRIPT_NAME"] = env["SCRIPT_NAME"]
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super(env)
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end
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# Reload application routes regardless if they changed or not.
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def reload_routes!
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routes_reloader.reload!
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end
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# Return the application's KeyGenerator
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def key_generator
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# number of iterations selected based on consultation with the google security
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# team. Details at https://github.com/rails/rails/pull/6952#issuecomment-7661220
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@caching_key_generator ||=
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if secrets.secret_key_base
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key_generator = ActiveSupport::KeyGenerator.new(secrets.secret_key_base, iterations: 1000)
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ActiveSupport::CachingKeyGenerator.new(key_generator)
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else
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ActiveSupport::LegacyKeyGenerator.new(config.secret_token)
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end
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end
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# Returns a message verifier object.
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#
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# This verifier can be used to generate and verify signed messages in the application.
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#
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# It is recommended not to use the same verifier for different things, so you can get different
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# verifiers passing the +verifier_name+ argument.
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#
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# ==== Parameters
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#
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# * +verifier_name+ - the name of the message verifier.
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#
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# ==== Examples
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#
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# message = Rails.application.message_verifier('sensitive_data').generate('my sensible data')
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# Rails.application.message_verifier('sensitive_data').verify(message)
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# # => 'my sensible data'
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#
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# See the +ActiveSupport::MessageVerifier+ documentation for more information.
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def message_verifier(verifier_name)
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@message_verifiers[verifier_name] ||= begin
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secret = key_generator.generate_key(verifier_name.to_s)
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ActiveSupport::MessageVerifier.new(secret)
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end
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end
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# Convenience for loading config/foo.yml for the current Rails env.
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#
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# Example:
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#
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# # config/exception_notification.yml:
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# production:
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# url: http://127.0.0.1:8080
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# namespace: my_app_production
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# development:
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# url: http://localhost:3001
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# namespace: my_app_development
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#
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# # config/production.rb
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# MyApp::Application.configure do
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# config.middleware.use ExceptionNotifier, config_for(:exception_notification)
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# end
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def config_for(name)
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yaml = Pathname.new("#{paths["config"].existent.first}/#{name}.yml")
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if yaml.exist?
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require "yaml"
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require "erb"
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(YAML.load(ERB.new(yaml.read).result) || {})[Rails.env] || {}
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else
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raise "Could not load configuration. No such file - #{yaml}"
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end
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rescue Psych::SyntaxError => e
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raise "YAML syntax error occurred while parsing #{yaml}. " \
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"Please note that YAML must be consistently indented using spaces. Tabs are not allowed. " \
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"Error: #{e.message}"
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end
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# Stores some of the Rails initial environment parameters which
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# will be used by middlewares and engines to configure themselves.
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def env_config
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@app_env_config ||= begin
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validate_secret_key_config!
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super.merge({
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"action_dispatch.parameter_filter" => config.filter_parameters,
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"action_dispatch.redirect_filter" => config.filter_redirect,
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"action_dispatch.secret_token" => config.secret_token,
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"action_dispatch.secret_key_base" => secrets.secret_key_base,
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"action_dispatch.show_exceptions" => config.action_dispatch.show_exceptions,
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"action_dispatch.show_detailed_exceptions" => config.consider_all_requests_local,
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"action_dispatch.logger" => Rails.logger,
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"action_dispatch.backtrace_cleaner" => Rails.backtrace_cleaner,
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"action_dispatch.key_generator" => key_generator,
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"action_dispatch.http_auth_salt" => config.action_dispatch.http_auth_salt,
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"action_dispatch.signed_cookie_salt" => config.action_dispatch.signed_cookie_salt,
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"action_dispatch.encrypted_cookie_salt" => config.action_dispatch.encrypted_cookie_salt,
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"action_dispatch.encrypted_signed_cookie_salt" => config.action_dispatch.encrypted_signed_cookie_salt,
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"action_dispatch.cookies_serializer" => config.action_dispatch.cookies_serializer,
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"action_dispatch.cookies_digest" => config.action_dispatch.cookies_digest
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})
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end
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end
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# If you try to define a set of rake tasks on the instance, these will get
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# passed up to the rake tasks defined on the application's class.
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def rake_tasks(&block)
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self.class.rake_tasks(&block)
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end
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# Sends the initializers to the +initializer+ method defined in the
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# Rails::Initializable module. Each Rails::Application class has its own
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# set of initializers, as defined by the Initializable module.
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def initializer(name, opts={}, &block)
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self.class.initializer(name, opts, &block)
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end
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# Sends any runner called in the instance of a new application up
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# to the +runner+ method defined in Rails::Railtie.
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def runner(&blk)
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self.class.runner(&blk)
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end
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# Sends any console called in the instance of a new application up
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# to the +console+ method defined in Rails::Railtie.
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def console(&blk)
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self.class.console(&blk)
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end
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# Sends any generators called in the instance of a new application up
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# to the +generators+ method defined in Rails::Railtie.
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def generators(&blk)
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self.class.generators(&blk)
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end
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# Sends the +isolate_namespace+ method up to the class method.
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def isolate_namespace(mod)
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self.class.isolate_namespace(mod)
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end
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## Rails internal API
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# This method is called just after an application inherits from Rails::Application,
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# allowing the developer to load classes in lib and use them during application
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# configuration.
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#
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# class MyApplication < Rails::Application
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# require "my_backend" # in lib/my_backend
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# config.i18n.backend = MyBackend
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# end
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#
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# Notice this method takes into consideration the default root path. So if you
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# are changing config.root inside your application definition or having a custom
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# Rails application, you will need to add lib to $LOAD_PATH on your own in case
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# you need to load files in lib/ during the application configuration as well.
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def add_lib_to_load_path! #:nodoc:
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path = File.join config.root, 'lib'
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if File.exist?(path) && !$LOAD_PATH.include?(path)
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$LOAD_PATH.unshift(path)
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end
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end
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def require_environment! #:nodoc:
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environment = paths["config/environment"].existent.first
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require environment if environment
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end
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def routes_reloader #:nodoc:
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@routes_reloader ||= RoutesReloader.new
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end
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# Returns an array of file paths appended with a hash of
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# directories-extensions suitable for ActiveSupport::FileUpdateChecker
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# API.
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def watchable_args #:nodoc:
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files, dirs = config.watchable_files.dup, config.watchable_dirs.dup
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ActiveSupport::Dependencies.autoload_paths.each do |path|
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dirs[path.to_s] = [:rb]
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end
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[files, dirs]
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end
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# Initialize the application passing the given group. By default, the
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# group is :default
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def initialize!(group=:default) #:nodoc:
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raise "Application has been already initialized." if @initialized
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run_initializers(group, self)
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@initialized = true
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self
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end
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def initializers #:nodoc:
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Bootstrap.initializers_for(self) +
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railties_initializers(super) +
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Finisher.initializers_for(self)
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end
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def config #:nodoc:
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@config ||= Application::Configuration.new(find_root_with_flag("config.ru", Dir.pwd))
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end
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def config=(configuration) #:nodoc:
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@config = configuration
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end
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def secrets #:nodoc:
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@secrets ||= begin
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secrets = ActiveSupport::OrderedOptions.new
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yaml = config.paths["config/secrets"].first
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if File.exist?(yaml)
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require "erb"
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all_secrets = YAML.load(ERB.new(IO.read(yaml)).result) || {}
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env_secrets = all_secrets[Rails.env]
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secrets.merge!(env_secrets.symbolize_keys) if env_secrets
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end
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# Fallback to config.secret_key_base if secrets.secret_key_base isn't set
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secrets.secret_key_base ||= config.secret_key_base
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secrets
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end
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end
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def secrets=(secrets) #:nodoc:
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@secrets = secrets
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end
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def to_app #:nodoc:
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self
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end
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def helpers_paths #:nodoc:
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config.helpers_paths
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end
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console do
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require "pp"
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end
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console do
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unless ::Kernel.private_method_defined?(:y)
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if RUBY_VERSION >= '2.0'
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require "psych/y"
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else
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module ::Kernel
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def y(*objects)
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puts ::Psych.dump_stream(*objects)
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end
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private :y
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end
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end
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end
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end
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# Return an array of railties respecting the order they're loaded
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# and the order specified by the +railties_order+ config.
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#
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# While when running initializers we need engines in reverse
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# order here when copying migrations from railties we need then in the same
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# order as given by +railties_order+
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def migration_railties # :nodoc:
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ordered_railties.flatten - [self]
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end
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protected
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alias :build_middleware_stack :app
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def run_tasks_blocks(app) #:nodoc:
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railties.each { |r| r.run_tasks_blocks(app) }
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super
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require "rails/tasks"
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task :environment do
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ActiveSupport.on_load(:before_initialize) { config.eager_load = false }
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require_environment!
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end
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end
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def run_generators_blocks(app) #:nodoc:
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railties.each { |r| r.run_generators_blocks(app) }
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super
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end
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def run_runner_blocks(app) #:nodoc:
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railties.each { |r| r.run_runner_blocks(app) }
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super
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end
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def run_console_blocks(app) #:nodoc:
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railties.each { |r| r.run_console_blocks(app) }
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super
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end
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# Returns the ordered railties for this application considering railties_order.
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def ordered_railties #:nodoc:
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@ordered_railties ||= begin
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order = config.railties_order.map do |railtie|
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if railtie == :main_app
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self
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elsif railtie.respond_to?(:instance)
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railtie.instance
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else
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railtie
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end
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end
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all = (railties - order)
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all.push(self) unless (all + order).include?(self)
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order.push(:all) unless order.include?(:all)
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index = order.index(:all)
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order[index] = all
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order
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end
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end
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def railties_initializers(current) #:nodoc:
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initializers = []
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ordered_railties.reverse.flatten.each do |r|
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if r == self
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initializers += current
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else
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initializers += r.initializers
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end
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end
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initializers
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end
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def default_middleware_stack #:nodoc:
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default_stack = DefaultMiddlewareStack.new(self, config, paths)
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default_stack.build_stack
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end
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def build_original_fullpath(env) #:nodoc:
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path_info = env["PATH_INFO"]
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query_string = env["QUERY_STRING"]
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script_name = env["SCRIPT_NAME"]
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if query_string.present?
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"#{script_name}#{path_info}?#{query_string}"
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else
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"#{script_name}#{path_info}"
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end
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end
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def validate_secret_key_config! #:nodoc:
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if secrets.secret_key_base.blank? && config.secret_token.blank?
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raise "Missing `secret_key_base` for '#{Rails.env}' environment, set this value in `config/secrets.yml`"
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end
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end
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end
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end
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