module ActiveSupport::Autoload

def self.eager_autoload!
  @@autoloads.values.each { |file| require file }
end

def autoload(const_name, path = @@at_path)
  full = [self.name, @@under_path, const_name.to_s, path].compact.join("::")
  location = path || Inflector.underscore(full)
  if @@eager_autoload
    @@autoloads[const_name] = location
  end
  super const_name, location
end

def autoload_at(path)
  @@at_path, old_path = path, @@at_path
  yield
ensure
  @@at_path = old_path
end

def autoload_under(path)
  @@under_path, old_path = path, @@under_path
  yield
ensure
  @@under_path = old_path
end

def autoloads
  @@autoloads
end

def eager_autoload
  old_eager, @@eager_autoload = @@eager_autoload, true
  yield
ensure
  @@eager_autoload = old_eager
end