diff options
Diffstat (limited to 'activesupport/lib/active_support/dependencies.rb')
| -rw-r--r-- | activesupport/lib/active_support/dependencies.rb | 785 |
1 files changed, 393 insertions, 392 deletions
diff --git a/activesupport/lib/active_support/dependencies.rb b/activesupport/lib/active_support/dependencies.rb index da2ece610a..7a8c4d0326 100644 --- a/activesupport/lib/active_support/dependencies.rb +++ b/activesupport/lib/active_support/dependencies.rb @@ -3,458 +3,459 @@ require 'active_support/core_ext/module/attribute_accessors' require 'active_support/core_ext/load_error' require 'active_support/core_ext/kernel' -module Dependencies #:nodoc: - extend self - - # Should we turn on Ruby warnings on the first load of dependent files? - mattr_accessor :warnings_on_first_load - self.warnings_on_first_load = false - - # All files ever loaded. - mattr_accessor :history - self.history = Set.new - - # All files currently loaded. - mattr_accessor :loaded - self.loaded = Set.new - - # Should we load files or require them? - mattr_accessor :mechanism - self.mechanism = :load - - # The set of directories from which we may automatically load files. Files - # under these directories will be reloaded on each request in development mode, - # unless the directory also appears in load_once_paths. - mattr_accessor :load_paths - self.load_paths = [] - - # The set of directories from which automatically loaded constants are loaded - # only once. All directories in this set must also be present in +load_paths+. - mattr_accessor :load_once_paths - self.load_once_paths = [] - - # An array of qualified constant names that have been loaded. Adding a name to - # this array will cause it to be unloaded the next time Dependencies are cleared. - mattr_accessor :autoloaded_constants - self.autoloaded_constants = [] - - # An array of constant names that need to be unloaded on every request. Used - # to allow arbitrary constants to be marked for unloading. - mattr_accessor :explicitly_unloadable_constants - self.explicitly_unloadable_constants = [] - - # Set to true to enable logging of const_missing and file loads - mattr_accessor :log_activity - self.log_activity = false - - # An internal stack used to record which constants are loaded by any block. - mattr_accessor :constant_watch_stack - self.constant_watch_stack = [] - - def load? - mechanism == :load - end - - def depend_on(file_name, swallow_load_errors = false) - path = search_for_file(file_name) - require_or_load(path || file_name) - rescue LoadError - raise unless swallow_load_errors - end - - def associate_with(file_name) - depend_on(file_name, true) - end +module ActiveSupport #:nodoc: + module Dependencies #:nodoc: + extend self + + # Should we turn on Ruby warnings on the first load of dependent files? + mattr_accessor :warnings_on_first_load + self.warnings_on_first_load = false + + # All files ever loaded. + mattr_accessor :history + self.history = Set.new + + # All files currently loaded. + mattr_accessor :loaded + self.loaded = Set.new + + # Should we load files or require them? + mattr_accessor :mechanism + self.mechanism = :load + + # The set of directories from which we may automatically load files. Files + # under these directories will be reloaded on each request in development mode, + # unless the directory also appears in load_once_paths. + mattr_accessor :load_paths + self.load_paths = [] + + # The set of directories from which automatically loaded constants are loaded + # only once. All directories in this set must also be present in +load_paths+. + mattr_accessor :load_once_paths + self.load_once_paths = [] + + # An array of qualified constant names that have been loaded. Adding a name to + # this array will cause it to be unloaded the next time Dependencies are cleared. + mattr_accessor :autoloaded_constants + self.autoloaded_constants = [] + + # An array of constant names that need to be unloaded on every request. Used + # to allow arbitrary constants to be marked for unloading. + mattr_accessor :explicitly_unloadable_constants + self.explicitly_unloadable_constants = [] + + # Set to true to enable logging of const_missing and file loads + mattr_accessor :log_activity + self.log_activity = false + + # An internal stack used to record which constants are loaded by any block. + mattr_accessor :constant_watch_stack + self.constant_watch_stack = [] + + def load? + mechanism == :load + end - def clear - log_call - loaded.clear - remove_unloadable_constants! - end + def depend_on(file_name, swallow_load_errors = false) + path = search_for_file(file_name) + require_or_load(path || file_name) + rescue LoadError + raise unless swallow_load_errors + end - def require_or_load(file_name, const_path = nil) - log_call file_name, const_path - file_name = $1 if file_name =~ /^(.*)\.rb$/ - expanded = File.expand_path(file_name) - return if loaded.include?(expanded) + def associate_with(file_name) + depend_on(file_name, true) + end - # Record that we've seen this file *before* loading it to avoid an - # infinite loop with mutual dependencies. - loaded << expanded + def clear + log_call + loaded.clear + remove_unloadable_constants! + end - begin - if load? - log "loading #{file_name}" + def require_or_load(file_name, const_path = nil) + log_call file_name, const_path + file_name = $1 if file_name =~ /^(.*)\.rb$/ + expanded = File.expand_path(file_name) + return if loaded.include?(expanded) - # Enable warnings iff this file has not been loaded before and - # warnings_on_first_load is set. - load_args = ["#{file_name}.rb"] - load_args << const_path unless const_path.nil? + # Record that we've seen this file *before* loading it to avoid an + # infinite loop with mutual dependencies. + loaded << expanded - if !warnings_on_first_load or history.include?(expanded) - result = load_file(*load_args) + begin + if load? + log "loading #{file_name}" + + # Enable warnings iff this file has not been loaded before and + # warnings_on_first_load is set. + load_args = ["#{file_name}.rb"] + load_args << const_path unless const_path.nil? + + if !warnings_on_first_load or history.include?(expanded) + result = load_file(*load_args) + else + enable_warnings { result = load_file(*load_args) } + end else - enable_warnings { result = load_file(*load_args) } + log "requiring #{file_name}" + result = require file_name end - else - log "requiring #{file_name}" - result = require file_name + rescue Exception + loaded.delete expanded + raise end - rescue Exception - loaded.delete expanded - raise - end - # Record history *after* loading so first load gets warnings. - history << expanded - return result - end + # Record history *after* loading so first load gets warnings. + history << expanded + return result + end - # Is the provided constant path defined? - def qualified_const_defined?(path) - raise NameError, "#{path.inspect} is not a valid constant name!" unless - /^(::)?([A-Z]\w*)(::[A-Z]\w*)*$/ =~ path + # Is the provided constant path defined? + def qualified_const_defined?(path) + raise NameError, "#{path.inspect} is not a valid constant name!" unless + /^(::)?([A-Z]\w*)(::[A-Z]\w*)*$/ =~ path - names = path.to_s.split('::') - names.shift if names.first.empty? + names = path.to_s.split('::') + names.shift if names.first.empty? - # We can't use defined? because it will invoke const_missing for the parent - # of the name we are checking. - names.inject(Object) do |mod, name| - return false unless uninherited_const_defined?(mod, name) - mod.const_get name + # We can't use defined? because it will invoke const_missing for the parent + # of the name we are checking. + names.inject(Object) do |mod, name| + return false unless uninherited_const_defined?(mod, name) + mod.const_get name + end + return true end - return true - end - if Module.method(:const_defined?).arity == 1 - # Does this module define this constant? - # Wrapper to accomodate changing Module#const_defined? in Ruby 1.9 - def uninherited_const_defined?(mod, const) - mod.const_defined?(const) - end - else - def uninherited_const_defined?(mod, const) #:nodoc: - mod.const_defined?(const, false) + if Module.method(:const_defined?).arity == 1 + # Does this module define this constant? + # Wrapper to accomodate changing Module#const_defined? in Ruby 1.9 + def uninherited_const_defined?(mod, const) + mod.const_defined?(const) + end + else + def uninherited_const_defined?(mod, const) #:nodoc: + mod.const_defined?(const, false) + end end - end - - # Given +path+, a filesystem path to a ruby file, return an array of constant - # paths which would cause Dependencies to attempt to load this file. - def loadable_constants_for_path(path, bases = load_paths) - path = $1 if path =~ /\A(.*)\.rb\Z/ - expanded_path = File.expand_path(path) - - bases.collect do |root| - expanded_root = File.expand_path(root) - next unless %r{\A#{Regexp.escape(expanded_root)}(/|\\)} =~ expanded_path - - nesting = expanded_path[(expanded_root.size)..-1] - nesting = nesting[1..-1] if nesting && nesting[0] == ?/ - next if nesting.blank? - - [ - nesting.camelize, - # Special case: application.rb might define ApplicationControlller. - ('ApplicationController' if nesting == 'application') - ] - end.flatten.compact.uniq - end - # Search for a file in load_paths matching the provided suffix. - def search_for_file(path_suffix) - path_suffix = path_suffix + '.rb' unless path_suffix.ends_with? '.rb' - load_paths.each do |root| - path = File.join(root, path_suffix) - return path if File.file? path + # Given +path+, a filesystem path to a ruby file, return an array of constant + # paths which would cause Dependencies to attempt to load this file. + def loadable_constants_for_path(path, bases = load_paths) + path = $1 if path =~ /\A(.*)\.rb\Z/ + expanded_path = File.expand_path(path) + + bases.collect do |root| + expanded_root = File.expand_path(root) + next unless %r{\A#{Regexp.escape(expanded_root)}(/|\\)} =~ expanded_path + + nesting = expanded_path[(expanded_root.size)..-1] + nesting = nesting[1..-1] if nesting && nesting[0] == ?/ + next if nesting.blank? + + [ + nesting.camelize, + # Special case: application.rb might define ApplicationControlller. + ('ApplicationController' if nesting == 'application') + ] + end.flatten.compact.uniq end - nil # Gee, I sure wish we had first_match ;-) - end - # Does the provided path_suffix correspond to an autoloadable module? - # Instead of returning a boolean, the autoload base for this module is returned. - def autoloadable_module?(path_suffix) - load_paths.each do |load_path| - return load_path if File.directory? File.join(load_path, path_suffix) + # Search for a file in load_paths matching the provided suffix. + def search_for_file(path_suffix) + path_suffix = path_suffix + '.rb' unless path_suffix.ends_with? '.rb' + load_paths.each do |root| + path = File.join(root, path_suffix) + return path if File.file? path + end + nil # Gee, I sure wish we had first_match ;-) end - nil - end - - def load_once_path?(path) - load_once_paths.any? { |base| path.starts_with? base } - end - # Attempt to autoload the provided module name by searching for a directory - # matching the expect path suffix. If found, the module is created and assigned - # to +into+'s constants with the name +const_name+. Provided that the directory - # was loaded from a reloadable base path, it is added to the set of constants - # that are to be unloaded. - def autoload_module!(into, const_name, qualified_name, path_suffix) - return nil unless base_path = autoloadable_module?(path_suffix) - mod = Module.new - into.const_set const_name, mod - autoloaded_constants << qualified_name unless load_once_paths.include?(base_path) - return mod - end - - # Load the file at the provided path. +const_paths+ is a set of qualified - # constant names. When loading the file, Dependencies will watch for the - # addition of these constants. Each that is defined will be marked as - # autoloaded, and will be removed when Dependencies.clear is next called. - # - # If the second parameter is left off, then Dependencies will construct a set - # of names that the file at +path+ may define. See - # +loadable_constants_for_path+ for more details. - def load_file(path, const_paths = loadable_constants_for_path(path)) - log_call path, const_paths - const_paths = [const_paths].compact unless const_paths.is_a? Array - parent_paths = const_paths.collect { |const_path| /(.*)::[^:]+\Z/ =~ const_path ? $1 : :Object } - - result = nil - newly_defined_paths = new_constants_in(*parent_paths) do - result = load_without_new_constant_marking path + # Does the provided path_suffix correspond to an autoloadable module? + # Instead of returning a boolean, the autoload base for this module is returned. + def autoloadable_module?(path_suffix) + load_paths.each do |load_path| + return load_path if File.directory? File.join(load_path, path_suffix) + end + nil end - autoloaded_constants.concat newly_defined_paths unless load_once_path?(path) - autoloaded_constants.uniq! - log "loading #{path} defined #{newly_defined_paths * ', '}" unless newly_defined_paths.empty? - return result - end + def load_once_path?(path) + load_once_paths.any? { |base| path.starts_with? base } + end - # Return the constant path for the provided parent and constant name. - def qualified_name_for(mod, name) - mod_name = to_constant_name mod - (%w(Object Kernel).include? mod_name) ? name.to_s : "#{mod_name}::#{name}" - end + # Attempt to autoload the provided module name by searching for a directory + # matching the expect path suffix. If found, the module is created and assigned + # to +into+'s constants with the name +const_name+. Provided that the directory + # was loaded from a reloadable base path, it is added to the set of constants + # that are to be unloaded. + def autoload_module!(into, const_name, qualified_name, path_suffix) + return nil unless base_path = autoloadable_module?(path_suffix) + mod = Module.new + into.const_set const_name, mod + autoloaded_constants << qualified_name unless load_once_paths.include?(base_path) + return mod + end - # Load the constant named +const_name+ which is missing from +from_mod+. If - # it is not possible to load the constant into from_mod, try its parent module - # using const_missing. - def load_missing_constant(from_mod, const_name) - log_call from_mod, const_name - if from_mod == Kernel - if ::Object.const_defined?(const_name) - log "Returning Object::#{const_name} for Kernel::#{const_name}" - return ::Object.const_get(const_name) - else - log "Substituting Object for Kernel" - from_mod = Object + # Load the file at the provided path. +const_paths+ is a set of qualified + # constant names. When loading the file, Dependencies will watch for the + # addition of these constants. Each that is defined will be marked as + # autoloaded, and will be removed when Dependencies.clear is next called. + # + # If the second parameter is left off, then Dependencies will construct a set + # of names that the file at +path+ may define. See + # +loadable_constants_for_path+ for more details. + def load_file(path, const_paths = loadable_constants_for_path(path)) + log_call path, const_paths + const_paths = [const_paths].compact unless const_paths.is_a? Array + parent_paths = const_paths.collect { |const_path| /(.*)::[^:]+\Z/ =~ const_path ? $1 : :Object } + + result = nil + newly_defined_paths = new_constants_in(*parent_paths) do + result = load_without_new_constant_marking path end - end - # If we have an anonymous module, all we can do is attempt to load from Object. - from_mod = Object if from_mod.name.blank? + autoloaded_constants.concat newly_defined_paths unless load_once_path?(path) + autoloaded_constants.uniq! + log "loading #{path} defined #{newly_defined_paths * ', '}" unless newly_defined_paths.empty? + return result + end - unless qualified_const_defined?(from_mod.name) && from_mod.name.constantize.object_id == from_mod.object_id - raise ArgumentError, "A copy of #{from_mod} has been removed from the module tree but is still active!" + # Return the constant path for the provided parent and constant name. + def qualified_name_for(mod, name) + mod_name = to_constant_name mod + (%w(Object Kernel).include? mod_name) ? name.to_s : "#{mod_name}::#{name}" end - raise ArgumentError, "#{from_mod} is not missing constant #{const_name}!" if uninherited_const_defined?(from_mod, const_name) + # Load the constant named +const_name+ which is missing from +from_mod+. If + # it is not possible to load the constant into from_mod, try its parent module + # using const_missing. + def load_missing_constant(from_mod, const_name) + log_call from_mod, const_name + if from_mod == Kernel + if ::Object.const_defined?(const_name) + log "Returning Object::#{const_name} for Kernel::#{const_name}" + return ::Object.const_get(const_name) + else + log "Substituting Object for Kernel" + from_mod = Object + end + end - qualified_name = qualified_name_for from_mod, const_name - path_suffix = qualified_name.underscore - name_error = NameError.new("uninitialized constant #{qualified_name}") + # If we have an anonymous module, all we can do is attempt to load from Object. + from_mod = Object if from_mod.name.blank? - file_path = search_for_file(path_suffix) - if file_path && ! loaded.include?(File.expand_path(file_path)) # We found a matching file to load - require_or_load file_path - raise LoadError, "Expected #{file_path} to define #{qualified_name}" unless uninherited_const_defined?(from_mod, const_name) - return from_mod.const_get(const_name) - elsif mod = autoload_module!(from_mod, const_name, qualified_name, path_suffix) - return mod - elsif (parent = from_mod.parent) && parent != from_mod && - ! from_mod.parents.any? { |p| uninherited_const_defined?(p, const_name) } - # If our parents do not have a constant named +const_name+ then we are free - # to attempt to load upwards. If they do have such a constant, then this - # const_missing must be due to from_mod::const_name, which should not - # return constants from from_mod's parents. - begin - return parent.const_missing(const_name) - rescue NameError => e - raise unless e.missing_name? qualified_name_for(parent, const_name) + unless qualified_const_defined?(from_mod.name) && from_mod.name.constantize.object_id == from_mod.object_id + raise ArgumentError, "A copy of #{from_mod} has been removed from the module tree but is still active!" + end + + raise ArgumentError, "#{from_mod} is not missing constant #{const_name}!" if uninherited_const_defined?(from_mod, const_name) + + qualified_name = qualified_name_for from_mod, const_name + path_suffix = qualified_name.underscore + name_error = NameError.new("uninitialized constant #{qualified_name}") + + file_path = search_for_file(path_suffix) + if file_path && ! loaded.include?(File.expand_path(file_path)) # We found a matching file to load + require_or_load file_path + raise LoadError, "Expected #{file_path} to define #{qualified_name}" unless uninherited_const_defined?(from_mod, const_name) + return from_mod.const_get(const_name) + elsif mod = autoload_module!(from_mod, const_name, qualified_name, path_suffix) + return mod + elsif (parent = from_mod.parent) && parent != from_mod && + ! from_mod.parents.any? { |p| uninherited_const_defined?(p, const_name) } + # If our parents do not have a constant named +const_name+ then we are free + # to attempt to load upwards. If they do have such a constant, then this + # const_missing must be due to from_mod::const_name, which should not + # return constants from from_mod's parents. + begin + return parent.const_missing(const_name) + rescue NameError => e + raise unless e.missing_name? qualified_name_for(parent, const_name) + raise name_error + end + else raise name_error end - else - raise name_error end - end - # Remove the constants that have been autoloaded, and those that have been - # marked for unloading. - def remove_unloadable_constants! - autoloaded_constants.each { |const| remove_constant const } - autoloaded_constants.clear - explicitly_unloadable_constants.each { |const| remove_constant const } - end + # Remove the constants that have been autoloaded, and those that have been + # marked for unloading. + def remove_unloadable_constants! + autoloaded_constants.each { |const| remove_constant const } + autoloaded_constants.clear + explicitly_unloadable_constants.each { |const| remove_constant const } + end - # Determine if the given constant has been automatically loaded. - def autoloaded?(desc) - # No name => anonymous module. - return false if desc.is_a?(Module) && desc.name.blank? - name = to_constant_name desc - return false unless qualified_const_defined? name - return autoloaded_constants.include?(name) - end + # Determine if the given constant has been automatically loaded. + def autoloaded?(desc) + # No name => anonymous module. + return false if desc.is_a?(Module) && desc.name.blank? + name = to_constant_name desc + return false unless qualified_const_defined? name + return autoloaded_constants.include?(name) + end - # Will the provided constant descriptor be unloaded? - def will_unload?(const_desc) - autoloaded?(desc) || - explicitly_unloadable_constants.include?(to_constant_name(const_desc)) - end + # Will the provided constant descriptor be unloaded? + def will_unload?(const_desc) + autoloaded?(desc) || + explicitly_unloadable_constants.include?(to_constant_name(const_desc)) + end - # Mark the provided constant name for unloading. This constant will be - # unloaded on each request, not just the next one. - def mark_for_unload(const_desc) - name = to_constant_name const_desc - if explicitly_unloadable_constants.include? name - return false - else - explicitly_unloadable_constants << name - return true + # Mark the provided constant name for unloading. This constant will be + # unloaded on each request, not just the next one. + def mark_for_unload(const_desc) + name = to_constant_name const_desc + if explicitly_unloadable_constants.include? name + return false + else + explicitly_unloadable_constants << name + return true + end end - end - # Run the provided block and detect the new constants that were loaded during - # its execution. Constants may only be regarded as 'new' once -- so if the - # block calls +new_constants_in+ again, then the constants defined within the - # inner call will not be reported in this one. - # - # If the provided block does not run to completion, and instead raises an - # exception, any new constants are regarded as being only partially defined - # and will be removed immediately. - def new_constants_in(*descs) - log_call(*descs) - - # Build the watch frames. Each frame is a tuple of - # [module_name_as_string, constants_defined_elsewhere] - watch_frames = descs.collect do |desc| - if desc.is_a? Module - mod_name = desc.name - initial_constants = desc.local_constant_names - elsif desc.is_a?(String) || desc.is_a?(Symbol) - mod_name = desc.to_s - - # Handle the case where the module has yet to be defined. - initial_constants = if qualified_const_defined?(mod_name) - mod_name.constantize.local_constant_names + # Run the provided block and detect the new constants that were loaded during + # its execution. Constants may only be regarded as 'new' once -- so if the + # block calls +new_constants_in+ again, then the constants defined within the + # inner call will not be reported in this one. + # + # If the provided block does not run to completion, and instead raises an + # exception, any new constants are regarded as being only partially defined + # and will be removed immediately. + def new_constants_in(*descs) + log_call(*descs) + + # Build the watch frames. Each frame is a tuple of + # [module_name_as_string, constants_defined_elsewhere] + watch_frames = descs.collect do |desc| + if desc.is_a? Module + mod_name = desc.name + initial_constants = desc.local_constant_names + elsif desc.is_a?(String) || desc.is_a?(Symbol) + mod_name = desc.to_s + + # Handle the case where the module has yet to be defined. + initial_constants = if qualified_const_defined?(mod_name) + mod_name.constantize.local_constant_names + else + [] + end else - [] + raise Argument, "#{desc.inspect} does not describe a module!" end - else - raise Argument, "#{desc.inspect} does not describe a module!" - end - [mod_name, initial_constants] - end + [mod_name, initial_constants] + end - constant_watch_stack.concat watch_frames + constant_watch_stack.concat watch_frames - aborting = true - begin - yield # Now yield to the code that is to define new constants. - aborting = false - ensure - # Find the new constants. - new_constants = watch_frames.collect do |mod_name, prior_constants| - # Module still doesn't exist? Treat it as if it has no constants. - next [] unless qualified_const_defined?(mod_name) - - mod = mod_name.constantize - next [] unless mod.is_a? Module - new_constants = mod.local_constant_names - prior_constants - - # Make sure no other frames takes credit for these constants. - constant_watch_stack.each do |frame_name, constants| - constants.concat new_constants if frame_name == mod_name + aborting = true + begin + yield # Now yield to the code that is to define new constants. + aborting = false + ensure + # Find the new constants. + new_constants = watch_frames.collect do |mod_name, prior_constants| + # Module still doesn't exist? Treat it as if it has no constants. + next [] unless qualified_const_defined?(mod_name) + + mod = mod_name.constantize + next [] unless mod.is_a? Module + new_constants = mod.local_constant_names - prior_constants + + # Make sure no other frames takes credit for these constants. + constant_watch_stack.each do |frame_name, constants| + constants.concat new_constants if frame_name == mod_name + end + + new_constants.collect do |suffix| + mod_name == "Object" ? suffix : "#{mod_name}::#{suffix}" + end + end.flatten + + log "New constants: #{new_constants * ', '}" + + if aborting + log "Error during loading, removing partially loaded constants " + new_constants.each { |name| remove_constant name } + new_constants.clear end + end - new_constants.collect do |suffix| - mod_name == "Object" ? suffix : "#{mod_name}::#{suffix}" + return new_constants + ensure + # Remove the stack frames that we added. + if defined?(watch_frames) && ! watch_frames.blank? + frame_ids = watch_frames.collect(&:object_id) + constant_watch_stack.delete_if do |watch_frame| + frame_ids.include? watch_frame.object_id end - end.flatten - - log "New constants: #{new_constants * ', '}" - - if aborting - log "Error during loading, removing partially loaded constants " - new_constants.each { |name| remove_constant name } - new_constants.clear end end - return new_constants - ensure - # Remove the stack frames that we added. - if defined?(watch_frames) && ! watch_frames.blank? - frame_ids = watch_frames.collect(&:object_id) - constant_watch_stack.delete_if do |watch_frame| - frame_ids.include? watch_frame.object_id + class LoadingModule #:nodoc: + # Old style environment.rb referenced this method directly. Please note, it doesn't + # actually *do* anything any more. + def self.root(*args) + if defined?(RAILS_DEFAULT_LOGGER) + RAILS_DEFAULT_LOGGER.warn "Your environment.rb uses the old syntax, it may not continue to work in future releases." + RAILS_DEFAULT_LOGGER.warn "For upgrade instructions please see: http://manuals.rubyonrails.com/read/book/19" + end end end - end - class LoadingModule #:nodoc: - # Old style environment.rb referenced this method directly. Please note, it doesn't - # actually *do* anything any more. - def self.root(*args) - if defined?(RAILS_DEFAULT_LOGGER) - RAILS_DEFAULT_LOGGER.warn "Your environment.rb uses the old syntax, it may not continue to work in future releases." - RAILS_DEFAULT_LOGGER.warn "For upgrade instructions please see: http://manuals.rubyonrails.com/read/book/19" + # Convert the provided const desc to a qualified constant name (as a string). + # A module, class, symbol, or string may be provided. + def to_constant_name(desc) #:nodoc: + name = case desc + when String then desc.starts_with?('::') ? desc[2..-1] : desc + when Symbol then desc.to_s + when Module + raise ArgumentError, "Anonymous modules have no name to be referenced by" if desc.name.blank? + desc.name + else raise TypeError, "Not a valid constant descriptor: #{desc.inspect}" end end - end - # Convert the provided const desc to a qualified constant name (as a string). - # A module, class, symbol, or string may be provided. - def to_constant_name(desc) #:nodoc: - name = case desc - when String then desc.starts_with?('::') ? desc[2..-1] : desc - when Symbol then desc.to_s - when Module - raise ArgumentError, "Anonymous modules have no name to be referenced by" if desc.name.blank? - desc.name - else raise TypeError, "Not a valid constant descriptor: #{desc.inspect}" - end - end + def remove_constant(const) #:nodoc: + return false unless qualified_const_defined? const - def remove_constant(const) #:nodoc: - return false unless qualified_const_defined? const + const = $1 if /\A::(.*)\Z/ =~ const.to_s + names = const.to_s.split('::') + if names.size == 1 # It's under Object + parent = Object + else + parent = (names[0..-2] * '::').constantize + end - const = $1 if /\A::(.*)\Z/ =~ const.to_s - names = const.to_s.split('::') - if names.size == 1 # It's under Object - parent = Object - else - parent = (names[0..-2] * '::').constantize + log "removing constant #{const}" + parent.instance_eval { remove_const names.last } + return true end - log "removing constant #{const}" - parent.instance_eval { remove_const names.last } - return true - end - -protected - def log_call(*args) - if defined?(RAILS_DEFAULT_LOGGER) && RAILS_DEFAULT_LOGGER && log_activity - arg_str = args.collect(&:inspect) * ', ' - /in `([a-z_\?\!]+)'/ =~ caller(1).first - selector = $1 || '<unknown>' - log "called #{selector}(#{arg_str})" - end - end + protected + def log_call(*args) + if defined?(RAILS_DEFAULT_LOGGER) && RAILS_DEFAULT_LOGGER && log_activity + arg_str = args.collect(&:inspect) * ', ' + /in `([a-z_\?\!]+)'/ =~ caller(1).first + selector = $1 || '<unknown>' + log "called #{selector}(#{arg_str})" + end + end - def log(msg) - if defined?(RAILS_DEFAULT_LOGGER) && RAILS_DEFAULT_LOGGER && log_activity - RAILS_DEFAULT_LOGGER.debug "Dependencies: #{msg}" - end + def log(msg) + if defined?(RAILS_DEFAULT_LOGGER) && RAILS_DEFAULT_LOGGER && log_activity + RAILS_DEFAULT_LOGGER.debug "Dependencies: #{msg}" + end + end end - end Object.instance_eval do - define_method(:require_or_load) { |file_name| Dependencies.require_or_load(file_name) } unless Object.respond_to?(:require_or_load) - define_method(:require_dependency) { |file_name| Dependencies.depend_on(file_name) } unless Object.respond_to?(:require_dependency) - define_method(:require_association) { |file_name| Dependencies.associate_with(file_name) } unless Object.respond_to?(:require_association) + define_method(:require_or_load) { |file_name| ActiveSupport::Dependencies.require_or_load(file_name) } unless Object.respond_to?(:require_or_load) + define_method(:require_dependency) { |file_name| ActiveSupport::Dependencies.depend_on(file_name) } unless Object.respond_to?(:require_dependency) + define_method(:require_association) { |file_name| ActiveSupport::Dependencies.associate_with(file_name) } unless Object.respond_to?(:require_association) end class Module #:nodoc: @@ -464,7 +465,7 @@ class Module #:nodoc: # Use const_missing to autoload associations so we don't have to # require_association when using single-table inheritance. def const_missing(class_id) - Dependencies.load_missing_constant self, class_id + ActiveSupport::Dependencies.load_missing_constant self, class_id end def unloadable(const_desc = self) @@ -480,15 +481,15 @@ class Class else begin begin - Dependencies.load_missing_constant self, const_name + ActiveSupport::Dependencies.load_missing_constant self, const_name rescue NameError parent.send :const_missing, const_name end rescue NameError => e # Make sure that the name we are missing is the one that caused the error - parent_qualified_name = Dependencies.qualified_name_for parent, const_name + parent_qualified_name = ActiveSupport::Dependencies.qualified_name_for parent, const_name raise unless e.missing_name? parent_qualified_name - qualified_name = Dependencies.qualified_name_for self, const_name + qualified_name = ActiveSupport::Dependencies.qualified_name_for self, const_name raise NameError.new("uninitialized constant #{qualified_name}").copy_blame!(e) end end @@ -499,14 +500,14 @@ class Object alias_method :load_without_new_constant_marking, :load def load(file, *extras) #:nodoc: - Dependencies.new_constants_in(Object) { super } + ActiveSupport::Dependencies.new_constants_in(Object) { super } rescue Exception => exception # errors from loading file exception.blame_file! file raise end def require(file, *extras) #:nodoc: - Dependencies.new_constants_in(Object) { super } + ActiveSupport::Dependencies.new_constants_in(Object) { super } rescue Exception => exception # errors from required file exception.blame_file! file raise @@ -526,7 +527,7 @@ class Object # Returns true if the constant was not previously marked for unloading, false # otherwise. def unloadable(const_desc) - Dependencies.mark_for_unload const_desc + ActiveSupport::Dependencies.mark_for_unload const_desc end end |