diff options
Diffstat (limited to 'activesupport/lib/active_support/dependencies.rb')
| -rw-r--r-- | activesupport/lib/active_support/dependencies.rb | 25 |
1 files changed, 21 insertions, 4 deletions
diff --git a/activesupport/lib/active_support/dependencies.rb b/activesupport/lib/active_support/dependencies.rb index 9dc2c46880..238a9f0ee6 100644 --- a/activesupport/lib/active_support/dependencies.rb +++ b/activesupport/lib/active_support/dependencies.rb @@ -79,6 +79,12 @@ module ActiveSupport #:nodoc: # to allow arbitrary constants to be marked for unloading. mattr_accessor :explicitly_unloadable_constants, default: [] + # The logger used when tracing autoloads. + mattr_accessor :logger + + # If true, trace autoloads with +logger.debug+. + mattr_accessor :verbose, default: false + # The WatchStack keeps a stack of the modules being watched as files are # loaded. If a file in the process of being loaded (parent.rb) triggers the # load of another file (child.rb) the stack will ensure that child.rb @@ -416,7 +422,7 @@ module ActiveSupport #:nodoc: # Search for a file in autoload_paths matching the provided suffix. def search_for_file(path_suffix) - path_suffix = path_suffix.sub(/(\.rb)?$/, ".rb".freeze) + path_suffix += ".rb" unless path_suffix.ends_with?(".rb") autoload_paths.each do |root| path = File.join(root, path_suffix) @@ -450,6 +456,7 @@ module ActiveSupport #:nodoc: return nil unless base_path = autoloadable_module?(path_suffix) mod = Module.new into.const_set const_name, mod + log("constant #{qualified_name} autoloaded (module autovivified from #{File.join(base_path, path_suffix)})") autoloaded_constants << qualified_name unless autoload_once_paths.include?(base_path) autoloaded_constants.uniq! mod @@ -491,7 +498,7 @@ module ActiveSupport #:nodoc: raise ArgumentError, "A copy of #{from_mod} has been removed from the module tree but is still active!" end - qualified_name = qualified_name_for from_mod, const_name + qualified_name = qualified_name_for(from_mod, const_name) path_suffix = qualified_name.underscore file_path = search_for_file(path_suffix) @@ -504,8 +511,13 @@ module ActiveSupport #:nodoc: raise "Circular dependency detected while autoloading constant #{qualified_name}" else require_or_load(expanded, qualified_name) - raise LoadError, "Unable to autoload constant #{qualified_name}, expected #{file_path} to define it" unless from_mod.const_defined?(const_name, false) - return from_mod.const_get(const_name) + + if from_mod.const_defined?(const_name, false) + log("constant #{qualified_name} autoloaded from #{expanded}.rb") + return from_mod.const_get(const_name) + else + raise LoadError, "Unable to autoload constant #{qualified_name}, expected #{file_path} to define it" + end end elsif mod = autoload_module!(from_mod, const_name, qualified_name, path_suffix) return mod @@ -554,6 +566,7 @@ module ActiveSupport #:nodoc: # as the environment will be in an inconsistent state, e.g. other constants # may have already been unloaded and not accessible. def remove_unloadable_constants! + log("removing unloadable constants") autoloaded_constants.each { |const| remove_constant const } autoloaded_constants.clear Reference.clear! @@ -743,6 +756,10 @@ module ActiveSupport #:nodoc: # The constant is no longer reachable, just skip it. end end + + def log(message) + logger.debug("autoloading: #{message}") if logger && verbose + end end end |