702 lines
25 KiB
Ruby
702 lines
25 KiB
Ruby
require 'logger'
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require 'set'
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require File.join(File.dirname(__FILE__), 'railties_path')
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require File.join(File.dirname(__FILE__), 'rails/version')
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RAILS_ENV = (ENV['RAILS_ENV'] || 'development').dup unless defined?(RAILS_ENV)
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module Rails
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# The Initializer is responsible for processing the Rails configuration, such
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# as setting the $LOAD_PATH, requiring the right frameworks, initializing
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# logging, and more. It can be run either as a single command that'll just
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# use the default configuration, like this:
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#
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# Rails::Initializer.run
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#
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# But normally it's more interesting to pass in a custom configuration
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# through the block running:
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#
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# Rails::Initializer.run do |config|
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# config.frameworks -= [ :action_web_service ]
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# end
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#
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# This will use the default configuration options from Rails::Configuration,
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# but allow for overwriting on select areas.
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class Initializer
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# The Configuration instance used by this Initializer instance.
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attr_reader :configuration
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# The set of loaded plugins.
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attr_reader :loaded_plugins
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# Runs the initializer. By default, this will invoke the #process method,
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# which simply executes all of the initialization routines. Alternately,
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# you can specify explicitly which initialization routine you want:
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#
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# Rails::Initializer.run(:set_load_path)
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#
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# This is useful if you only want the load path initialized, without
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# incuring the overhead of completely loading the entire environment.
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def self.run(command = :process, configuration = Configuration.new)
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yield configuration if block_given?
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initializer = new configuration
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initializer.send(command)
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initializer
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end
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# Create a new Initializer instance that references the given Configuration
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# instance.
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def initialize(configuration)
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@configuration = configuration
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@loaded_plugins = []
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end
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# Sequentially step through all of the available initialization routines,
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# in order:
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#
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# * #set_load_path
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# * #set_connection_adapters
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# * #require_frameworks
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# * #load_environment
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# * #initialize_database
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# * #initialize_logger
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# * #initialize_framework_logging
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# * #initialize_framework_views
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# * #initialize_dependency_mechanism
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# * #initialize_breakpoints
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# * #initialize_whiny_nils
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# * #initialize_framework_settings
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# * #load_environment
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# * #load_plugins
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# * #load_observers
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# * #initialize_routing
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#
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# (Note that #load_environment is invoked twice, once at the start and
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# once at the end, to support the legacy configuration style where the
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# environment could overwrite the defaults directly, instead of via the
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# Configuration instance.
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def process
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check_ruby_version
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set_load_path
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set_connection_adapters
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require_frameworks
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set_autoload_paths
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load_environment
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initialize_encoding
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initialize_database
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initialize_logger
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initialize_framework_logging
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initialize_framework_views
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initialize_dependency_mechanism
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initialize_breakpoints
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initialize_whiny_nils
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initialize_temporary_directories
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initialize_framework_settings
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# Support for legacy configuration style where the environment
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# could overwrite anything set from the defaults/global through
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# the individual base class configurations.
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load_environment
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add_support_load_paths
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load_plugins
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# Observers are loaded after plugins in case Observers or observed models are modified by plugins.
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load_observers
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# Routing must be initialized after plugins to allow the former to extend the routes
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initialize_routing
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# the framework is now fully initialized
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after_initialize
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end
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# Check for valid Ruby version
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# This is done in an external file, so we can use it
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# from the `rails` program as well without duplication.
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def check_ruby_version
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require 'ruby_version_check'
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end
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# Set the <tt>$LOAD_PATH</tt> based on the value of
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# Configuration#load_paths. Duplicates are removed.
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def set_load_path
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load_paths = configuration.load_paths + configuration.framework_paths
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load_paths.reverse_each { |dir| $LOAD_PATH.unshift(dir) if File.directory?(dir) }
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$LOAD_PATH.uniq!
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end
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# Set the paths from which Rails will automatically load source files, and
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# the load_once paths.
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def set_autoload_paths
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Dependencies.load_paths = configuration.load_paths.uniq
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Dependencies.load_once_paths = configuration.load_once_paths.uniq
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extra = Dependencies.load_once_paths - Dependencies.load_paths
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unless extra.empty?
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abort <<-end_error
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load_once_paths must be a subset of the load_paths.
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Extra items in load_once_paths: #{extra * ','}
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end_error
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end
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# Freeze the arrays so future modifications will fail rather than do nothing mysteriously
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configuration.load_once_paths.freeze
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end
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# Sets the +RAILS_CONNECTION_ADAPTERS+ constant based on the value of
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# Configuration#connection_adapters. This constant is used to determine
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# which database adapters should be loaded (by default, all adapters are
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# loaded).
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def set_connection_adapters
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Object.const_set("RAILS_CONNECTION_ADAPTERS", configuration.connection_adapters) if configuration.connection_adapters
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end
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# Requires all frameworks specified by the Configuration#frameworks
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# list. By default, all frameworks (ActiveRecord, ActiveSupport,
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# ActionPack, ActionMailer, and ActionWebService) are loaded.
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def require_frameworks
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configuration.frameworks.each { |framework| require(framework.to_s) }
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end
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# Add the load paths used by support functions such as the info controller
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def add_support_load_paths
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end
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# Loads all plugins in <tt>config.plugin_paths</tt>. <tt>plugin_paths</tt>
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# defaults to <tt>vendor/plugins</tt> but may also be set to a list of
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# paths, such as
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# config.plugin_paths = ['lib/plugins', 'vendor/plugins']
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#
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# Each plugin discovered in <tt>plugin_paths</tt> is initialized:
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# * add its +lib+ directory, if present, to the beginning of the load path
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# * evaluate <tt>init.rb</tt> if present
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#
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# After all plugins are loaded, duplicates are removed from the load path.
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# If an array of plugin names is specified in config.plugins, the plugins
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# will be loaded in that order. Otherwise, plugins are loaded in alphabetical
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# order.
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def load_plugins
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if configuration.plugins.nil?
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# a nil value implies we don't care about plugins; load 'em all in a reliable order
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find_plugins(configuration.plugin_paths).sort.each { |path| load_plugin path }
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elsif !configuration.plugins.empty?
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# we've specified a config.plugins array, so respect that order
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plugin_paths = find_plugins(configuration.plugin_paths)
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configuration.plugins.each do |name|
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path = plugin_paths.find { |p| File.basename(p) == name }
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raise(LoadError, "Cannot find the plugin '#{name}'!") if path.nil?
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load_plugin path
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end
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end
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$LOAD_PATH.uniq!
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end
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# Loads the environment specified by Configuration#environment_path, which
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# is typically one of development, testing, or production.
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def load_environment
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silence_warnings do
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config = configuration
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constants = self.class.constants
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eval(IO.read(configuration.environment_path), binding, configuration.environment_path)
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(self.class.constants - constants).each do |const|
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Object.const_set(const, self.class.const_get(const))
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end
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end
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end
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def load_observers
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ActiveRecord::Base.instantiate_observers
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end
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# This initialzation sets $KCODE to 'u' to enable the multibyte safe operations.
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# Plugin authors supporting other encodings should override this behaviour and
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# set the relevant +default_charset+ on ActionController::Base
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def initialize_encoding
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$KCODE='u'
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end
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# This initialization routine does nothing unless <tt>:active_record</tt>
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# is one of the frameworks to load (Configuration#frameworks). If it is,
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# this sets the database configuration from Configuration#database_configuration
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# and then establishes the connection.
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def initialize_database
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return unless configuration.frameworks.include?(:active_record)
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ActiveRecord::Base.configurations = configuration.database_configuration
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ActiveRecord::Base.establish_connection
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end
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# If the +RAILS_DEFAULT_LOGGER+ constant is already set, this initialization
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# routine does nothing. If the constant is not set, and Configuration#logger
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# is not +nil+, this also does nothing. Otherwise, a new logger instance
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# is created at Configuration#log_path, with a default log level of
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# Configuration#log_level.
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#
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# If the log could not be created, the log will be set to output to
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# +STDERR+, with a log level of +WARN+.
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def initialize_logger
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# if the environment has explicitly defined a logger, use it
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return if defined?(RAILS_DEFAULT_LOGGER)
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unless logger = configuration.logger
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begin
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logger = Logger.new(configuration.log_path)
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logger.level = Logger.const_get(configuration.log_level.to_s.upcase)
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rescue StandardError
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logger = Logger.new(STDERR)
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logger.level = Logger::WARN
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logger.warn(
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"Rails Error: Unable to access log file. Please ensure that #{configuration.log_path} exists and is chmod 0666. " +
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"The log level has been raised to WARN and the output directed to STDERR until the problem is fixed."
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)
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end
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end
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silence_warnings { Object.const_set "RAILS_DEFAULT_LOGGER", logger }
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end
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# Sets the logger for ActiveRecord, ActionController, and ActionMailer
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# (but only for those frameworks that are to be loaded). If the framework's
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# logger is already set, it is not changed, otherwise it is set to use
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# +RAILS_DEFAULT_LOGGER+.
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def initialize_framework_logging
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for framework in ([ :active_record, :action_controller, :action_mailer ] & configuration.frameworks)
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framework.to_s.camelize.constantize.const_get("Base").logger ||= RAILS_DEFAULT_LOGGER
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end
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end
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# Sets the +template_root+ for ActionController::Base and ActionMailer::Base
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# (but only for those frameworks that are to be loaded). If the framework's
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# +template_root+ has already been set, it is not changed, otherwise it is
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# set to use Configuration#view_path.
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def initialize_framework_views
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for framework in ([ :action_controller, :action_mailer ] & configuration.frameworks)
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framework.to_s.camelize.constantize.const_get("Base").template_root ||= configuration.view_path
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end
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end
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# If ActionController is not one of the loaded frameworks (Configuration#frameworks)
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# this does nothing. Otherwise, it loads the routing definitions and sets up
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# loading module used to lazily load controllers (Configuration#controller_paths).
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def initialize_routing
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return unless configuration.frameworks.include?(:action_controller)
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ActionController::Routing.controller_paths = configuration.controller_paths
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ActionController::Routing::Routes.reload
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end
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# Sets the dependency loading mechanism based on the value of
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# Configuration#cache_classes.
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def initialize_dependency_mechanism
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Dependencies.mechanism = configuration.cache_classes ? :require : :load
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end
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# Sets the +BREAKPOINT_SERVER_PORT+ if Configuration#breakpoint_server
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# is true.
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def initialize_breakpoints
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silence_warnings { Object.const_set("BREAKPOINT_SERVER_PORT", 42531) if configuration.breakpoint_server }
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end
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# Loads support for "whiny nil" (noisy warnings when methods are invoked
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# on +nil+ values) if Configuration#whiny_nils is true.
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def initialize_whiny_nils
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require('active_support/whiny_nil') if configuration.whiny_nils
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end
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def initialize_temporary_directories
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if configuration.frameworks.include?(:action_controller)
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session_path = "#{RAILS_ROOT}/tmp/sessions/"
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ActionController::Base.session_options[:tmpdir] = File.exist?(session_path) ? session_path : Dir::tmpdir
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cache_path = "#{RAILS_ROOT}/tmp/cache/"
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if File.exist?(cache_path)
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ActionController::Base.fragment_cache_store = :file_store, cache_path
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end
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end
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end
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# Initializes framework-specific settings for each of the loaded frameworks
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# (Configuration#frameworks). The available settings map to the accessors
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# on each of the corresponding Base classes.
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def initialize_framework_settings
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configuration.frameworks.each do |framework|
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base_class = framework.to_s.camelize.constantize.const_get("Base")
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configuration.send(framework).each do |setting, value|
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base_class.send("#{setting}=", value)
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end
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end
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end
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# Fires the user-supplied after_initialize block (Configuration#after_initialize)
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def after_initialize
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configuration.after_initialize_block.call if configuration.after_initialize_block
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end
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protected
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# Return a list of plugin paths within base_path. A plugin path is
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# a directory that contains either a lib directory or an init.rb file.
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# This recurses into directories which are not plugin paths, so you
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# may organize your plugins within the plugin path.
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def find_plugins(*base_paths)
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base_paths.flatten.inject([]) do |plugins, base_path|
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Dir.glob(File.join(base_path, '*')).each do |path|
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if plugin_path?(path)
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plugins << path if plugin_enabled?(path)
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elsif File.directory?(path)
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plugins += find_plugins(path)
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end
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end
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plugins
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end
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end
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def plugin_path?(path)
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File.directory?(path) and (File.directory?(File.join(path, 'lib')) or File.file?(File.join(path, 'init.rb')))
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end
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def plugin_enabled?(path)
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configuration.plugins.nil? || configuration.plugins.include?(File.basename(path))
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end
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# Load the plugin at <tt>path</tt> unless already loaded.
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#
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# Each plugin is initialized:
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# * add its +lib+ directory, if present, to the beginning of the load path
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# * evaluate <tt>init.rb</tt> if present
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#
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# Returns <tt>true</tt> if the plugin is successfully loaded or
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# <tt>false</tt> if it is already loaded (similar to Kernel#require).
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# Raises <tt>LoadError</tt> if the plugin is not found.
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def load_plugin(directory)
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name = File.basename(directory)
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return false if loaded_plugins.include?(name)
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# Catch nonexistent and empty plugins.
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raise LoadError, "No such plugin: #{directory}" unless plugin_path?(directory)
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lib_path = File.join(directory, 'lib')
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init_path = File.join(directory, 'init.rb')
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has_lib = File.directory?(lib_path)
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has_init = File.file?(init_path)
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# Add lib to load path *after* the application lib, to allow
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# application libraries to override plugin libraries.
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if has_lib
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application_lib_index = $LOAD_PATH.index(File.join(RAILS_ROOT, "lib")) || 0
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$LOAD_PATH.insert(application_lib_index + 1, lib_path)
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Dependencies.load_paths << lib_path
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Dependencies.load_once_paths << lib_path
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end
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# Allow plugins to reference the current configuration object
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config = configuration
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# Add to set of loaded plugins before 'name' collapsed in eval.
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loaded_plugins << name
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# Evaluate init.rb.
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silence_warnings { eval(IO.read(init_path), binding, init_path) } if has_init
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true
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end
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end
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# The Configuration class holds all the parameters for the Initializer and
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# ships with defaults that suites most Rails applications. But it's possible
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# to overwrite everything. Usually, you'll create an Configuration file
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# implicitly through the block running on the Initializer, but it's also
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# possible to create the Configuration instance in advance and pass it in
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# like this:
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#
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# config = Rails::Configuration.new
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# Rails::Initializer.run(:process, config)
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class Configuration
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# A stub for setting options on ActionController::Base
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attr_accessor :action_controller
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# A stub for setting options on ActionMailer::Base
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attr_accessor :action_mailer
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# A stub for setting options on ActionView::Base
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attr_accessor :action_view
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# A stub for setting options on ActionWebService::Base
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attr_accessor :action_web_service
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# A stub for setting options on ActiveRecord::Base
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attr_accessor :active_record
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# Whether or not to use the breakpoint server (boolean)
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attr_accessor :breakpoint_server
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# Whether or not classes should be cached (set to false if you want
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# application classes to be reloaded on each request)
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attr_accessor :cache_classes
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# The list of connection adapters to load. (By default, all connection
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# adapters are loaded. You can set this to be just the adapter(s) you
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# will use to reduce your application's load time.)
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attr_accessor :connection_adapters
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# The list of paths that should be searched for controllers. (Defaults
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# to <tt>app/controllers</tt> and <tt>components</tt>.)
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attr_accessor :controller_paths
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# The path to the database configuration file to use. (Defaults to
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# <tt>config/database.yml</tt>.)
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attr_accessor :database_configuration_file
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# The list of rails framework components that should be loaded. (Defaults
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# to <tt>:active_record</tt>, <tt>:action_controller</tt>,
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# <tt>:action_view</tt>, <tt>:action_mailer</tt>, and
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# <tt>:action_web_service</tt>).
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attr_accessor :frameworks
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# An array of additional paths to prepend to the load path. By default,
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# all +app+, +lib+, +vendor+ and mock paths are included in this list.
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attr_accessor :load_paths
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# An array of paths from which Rails will automatically load from only once.
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# All elements of this array must also be in +load_paths+.
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attr_accessor :load_once_paths
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# The log level to use for the default Rails logger. In production mode,
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# this defaults to <tt>:info</tt>. In development mode, it defaults to
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# <tt>:debug</tt>.
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attr_accessor :log_level
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# The path to the log file to use. Defaults to log/#{environment}.log
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# (e.g. log/development.log or log/production.log).
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attr_accessor :log_path
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# The specific logger to use. By default, a logger will be created and
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# initialized using #log_path and #log_level, but a programmer may
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# specifically set the logger to use via this accessor and it will be
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# used directly.
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attr_accessor :logger
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# The root of the application's views. (Defaults to <tt>app/views</tt>.)
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attr_accessor :view_path
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# Set to +true+ if you want to be warned (noisily) when you try to invoke
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# any method of +nil+. Set to +false+ for the standard Ruby behavior.
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attr_accessor :whiny_nils
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# The list of plugins to load. If this is set to <tt>nil</tt>, all plugins will
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# be loaded. If this is set to <tt>[]</tt>, no plugins will be loaded. Otherwise,
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# plugins will be loaded in the order specified.
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attr_accessor :plugins
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# The path to the root of the plugins directory. By default, it is in
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|
# <tt>vendor/plugins</tt>.
|
|
attr_accessor :plugin_paths
|
|
|
|
# Create a new Configuration instance, initialized with the default
|
|
# values.
|
|
def initialize
|
|
self.frameworks = default_frameworks
|
|
self.load_paths = default_load_paths
|
|
self.load_once_paths = default_load_once_paths
|
|
self.log_path = default_log_path
|
|
self.log_level = default_log_level
|
|
self.view_path = default_view_path
|
|
self.controller_paths = default_controller_paths
|
|
self.cache_classes = default_cache_classes
|
|
self.breakpoint_server = default_breakpoint_server
|
|
self.whiny_nils = default_whiny_nils
|
|
self.plugins = default_plugins
|
|
self.plugin_paths = default_plugin_paths
|
|
self.database_configuration_file = default_database_configuration_file
|
|
|
|
for framework in default_frameworks
|
|
self.send("#{framework}=", Rails::OrderedOptions.new)
|
|
end
|
|
end
|
|
|
|
# Loads and returns the contents of the #database_configuration_file. The
|
|
# contents of the file are processed via ERB before being sent through
|
|
# YAML::load.
|
|
def database_configuration
|
|
YAML::load(ERB.new(IO.read(database_configuration_file)).result)
|
|
end
|
|
|
|
# The path to the current environment's file (development.rb, etc.). By
|
|
# default the file is at <tt>config/environments/#{environment}.rb</tt>.
|
|
def environment_path
|
|
"#{root_path}/config/environments/#{environment}.rb"
|
|
end
|
|
|
|
# Return the currently selected environment. By default, it returns the
|
|
# value of the +RAILS_ENV+ constant.
|
|
def environment
|
|
::RAILS_ENV
|
|
end
|
|
|
|
# Sets a block which will be executed after rails has been fully initialized.
|
|
# Useful for per-environment configuration which depends on the framework being
|
|
# fully initialized.
|
|
def after_initialize(&after_initialize_block)
|
|
@after_initialize_block = after_initialize_block
|
|
end
|
|
|
|
# Returns the block set in Configuration#after_initialize
|
|
def after_initialize_block
|
|
@after_initialize_block
|
|
end
|
|
|
|
# Add a preparation callback that will run before every request in development
|
|
# mode, or before the first request in production.
|
|
#
|
|
# See Dispatcher#to_prepare.
|
|
def to_prepare(&callback)
|
|
require 'dispatcher' unless defined?(::Dispatcher)
|
|
Dispatcher.to_prepare(&callback)
|
|
end
|
|
|
|
def builtin_directories
|
|
# Include builtins only in the development environment.
|
|
(environment == 'development') ? Dir["#{RAILTIES_PATH}/builtin/*/"] : []
|
|
end
|
|
|
|
def framework_paths
|
|
# TODO: Don't include dirs for frameworks that are not used
|
|
%w(
|
|
railties
|
|
railties/lib
|
|
actionpack/lib
|
|
activesupport/lib
|
|
activerecord/lib
|
|
actionmailer/lib
|
|
actionwebservice/lib
|
|
).map { |dir| "#{framework_root_path}/#{dir}" }.select { |dir| File.directory?(dir) }
|
|
end
|
|
|
|
private
|
|
def root_path
|
|
::RAILS_ROOT
|
|
end
|
|
|
|
def framework_root_path
|
|
defined?(::RAILS_FRAMEWORK_ROOT) ? ::RAILS_FRAMEWORK_ROOT : "#{root_path}/vendor/rails"
|
|
end
|
|
|
|
def default_frameworks
|
|
[ :active_record, :action_controller, :action_view, :action_mailer, :action_web_service ]
|
|
end
|
|
|
|
def default_load_paths
|
|
paths = ["#{root_path}/test/mocks/#{environment}"]
|
|
|
|
# Add the app's controller directory
|
|
paths.concat(Dir["#{root_path}/app/controllers/"])
|
|
|
|
# Then components subdirectories.
|
|
paths.concat(Dir["#{root_path}/components/[_a-z]*"])
|
|
|
|
# Followed by the standard includes.
|
|
paths.concat %w(
|
|
app
|
|
app/models
|
|
app/controllers
|
|
app/helpers
|
|
app/services
|
|
app/apis
|
|
components
|
|
config
|
|
lib
|
|
vendor
|
|
).map { |dir| "#{root_path}/#{dir}" }.select { |dir| File.directory?(dir) }
|
|
|
|
paths.concat builtin_directories
|
|
end
|
|
|
|
# Doesn't matter since plugins aren't in load_paths yet.
|
|
def default_load_once_paths
|
|
[]
|
|
end
|
|
|
|
def default_log_path
|
|
File.join(root_path, 'log', "#{environment}.log")
|
|
end
|
|
|
|
def default_log_level
|
|
environment == 'production' ? :info : :debug
|
|
end
|
|
|
|
def default_database_configuration_file
|
|
File.join(root_path, 'config', 'database.yml')
|
|
end
|
|
|
|
def default_view_path
|
|
File.join(root_path, 'app', 'views')
|
|
end
|
|
|
|
def default_controller_paths
|
|
paths = [ File.join(root_path, 'app', 'controllers'), File.join(root_path, 'components') ]
|
|
paths.concat builtin_directories
|
|
paths
|
|
end
|
|
|
|
def default_dependency_mechanism
|
|
:load
|
|
end
|
|
|
|
def default_cache_classes
|
|
false
|
|
end
|
|
|
|
def default_breakpoint_server
|
|
false
|
|
end
|
|
|
|
def default_whiny_nils
|
|
false
|
|
end
|
|
|
|
def default_plugins
|
|
nil
|
|
end
|
|
|
|
def default_plugin_paths
|
|
["#{root_path}/vendor/plugins"]
|
|
end
|
|
end
|
|
end
|
|
|
|
# Needs to be duplicated from Active Support since its needed before Active
|
|
# Support is available. Here both Options and Hash are namespaced to prevent
|
|
# conflicts with other implementations AND with the classes residing in ActiveSupport.
|
|
class Rails::OrderedOptions < Array #:nodoc:
|
|
def []=(key, value)
|
|
key = key.to_sym
|
|
|
|
if pair = find_pair(key)
|
|
pair.pop
|
|
pair << value
|
|
else
|
|
self << [key, value]
|
|
end
|
|
end
|
|
|
|
def [](key)
|
|
pair = find_pair(key.to_sym)
|
|
pair ? pair.last : nil
|
|
end
|
|
|
|
def method_missing(name, *args)
|
|
if name.to_s =~ /(.*)=$/
|
|
self[$1.to_sym] = args.first
|
|
else
|
|
self[name]
|
|
end
|
|
end
|
|
|
|
private
|
|
def find_pair(key)
|
|
self.each { |i| return i if i.first == key }
|
|
return false
|
|
end
|
|
end
|