diff options
Diffstat (limited to 'activesupport/lib/active_support/dependencies.rb')
-rw-r--r-- | activesupport/lib/active_support/dependencies.rb | 66 |
1 files changed, 40 insertions, 26 deletions
diff --git a/activesupport/lib/active_support/dependencies.rb b/activesupport/lib/active_support/dependencies.rb index 59675d744e..664cc15a29 100644 --- a/activesupport/lib/active_support/dependencies.rb +++ b/activesupport/lib/active_support/dependencies.rb @@ -30,6 +30,10 @@ module ActiveSupport #:nodoc: mattr_accessor :loaded self.loaded = Set.new + # Stack of files being loaded. + mattr_accessor :loading + self.loading = [] + # Should we load files or require them? mattr_accessor :mechanism self.mechanism = ENV['NO_RELOAD'] ? :require : :load @@ -180,13 +184,14 @@ module ActiveSupport #:nodoc: Dependencies.load_missing_constant(from_mod, const_name) end - # Dependencies assumes the name of the module reflects the nesting (unless - # it can be proven that is not the case), and the path to the file that - # defines the constant. Anonymous modules cannot follow these conventions - # and we assume therefore the user wants to refer to a top-level constant. + # We assume that the name of the module reflects the nesting + # (unless it can be proven that is not the case) and the path to the file + # that defines the constant. Anonymous modules cannot follow these + # conventions and therefore we assume that the user wants to refer to a + # top-level constant. def guess_for_anonymous(const_name) if Object.const_defined?(const_name) - raise NameError, "#{const_name} cannot be autoloaded from an anonymous class or module" + raise NameError.new "#{const_name} cannot be autoloaded from an anonymous class or module", const_name else Object end @@ -200,7 +205,10 @@ module ActiveSupport #:nodoc: # Object includes this module. module Loadable #:nodoc: def self.exclude_from(base) - base.class_eval { define_method(:load, Kernel.instance_method(:load)) } + base.class_eval do + define_method(:load, Kernel.instance_method(:load)) + private :load + end end def require_or_load(file_name) @@ -236,18 +244,6 @@ module ActiveSupport #:nodoc: raise end - def load(file, wrap = false) - result = false - load_dependency(file) { result = super } - result - end - - def require(file) - result = false - load_dependency(file) { result = super } - result - end - # Mark the given constant as unloadable. Unloadable constants are removed # each time dependencies are cleared. # @@ -264,6 +260,20 @@ module ActiveSupport #:nodoc: def unloadable(const_desc) Dependencies.mark_for_unload const_desc end + + private + + def load(file, wrap = false) + result = false + load_dependency(file) { result = super } + result + end + + def require(file) + result = false + load_dependency(file) { result = super } + result + end end # Exception file-blaming. @@ -316,6 +326,7 @@ module ActiveSupport #:nodoc: def clear log_call loaded.clear + loading.clear remove_unloadable_constants! end @@ -328,6 +339,7 @@ module ActiveSupport #:nodoc: # Record that we've seen this file *before* loading it to avoid an # infinite loop with mutual dependencies. loaded << expanded + loading << expanded begin if load? @@ -350,6 +362,8 @@ module ActiveSupport #:nodoc: rescue Exception loaded.delete expanded raise + ensure + loading.pop end # Record history *after* loading so first load gets warnings. @@ -359,7 +373,7 @@ module ActiveSupport #:nodoc: # Is the provided constant path defined? def qualified_const_defined?(path) - Object.qualified_const_defined?(path.sub(/^::/, ''), false) + Object.const_defined?(path, false) end # Given +path+, a filesystem path to a ruby file, return an array of @@ -407,7 +421,7 @@ module ActiveSupport #:nodoc: end def load_once_path?(path) - # to_s works around a ruby1.9 issue where String#starts_with?(Pathname) + # to_s works around a ruby issue where String#starts_with?(Pathname) # will raise a TypeError: no implicit conversion of Pathname into String autoload_once_paths.any? { |base| path.starts_with? base.to_s } end @@ -474,7 +488,7 @@ module ActiveSupport #:nodoc: expanded = File.expand_path(file_path) expanded.sub!(/\.rb\z/, '') - if loaded.include?(expanded) + if loading.include?(expanded) raise "Circular dependency detected while autoloading constant #{qualified_name}" else require_or_load(expanded, qualified_name) @@ -515,9 +529,9 @@ module ActiveSupport #:nodoc: end end - raise NameError, - "uninitialized constant #{qualified_name}", - caller.reject { |l| l.starts_with? __FILE__ } + name_error = NameError.new("uninitialized constant #{qualified_name}", const_name) + name_error.set_backtrace(caller.reject {|l| l.starts_with? __FILE__ }) + raise name_error end # Remove the constants that have been autoloaded, and those that have been @@ -593,7 +607,7 @@ module ActiveSupport #:nodoc: def autoloaded?(desc) return false if desc.is_a?(Module) && desc.anonymous? name = to_constant_name desc - return false unless qualified_const_defined? name + return false unless qualified_const_defined?(name) return autoloaded_constants.include?(name) end @@ -728,7 +742,7 @@ module ActiveSupport #:nodoc: protected def log_call(*args) if log_activity? - arg_str = args.collect { |arg| arg.inspect } * ', ' + arg_str = args.collect(&:inspect) * ', ' /in `([a-z_\?\!]+)'/ =~ caller(1).first selector = $1 || '<unknown>' log "called #{selector}(#{arg_str})" |