class ActionView::DependencyTracker

def self.find_dependencies(name, template, view_paths = nil)
  tracker = @trackers[template.handler]
  return [] unless tracker
  tracker.call(name, template, view_paths)
end

def self.register_tracker(extension, tracker)
  handler = Template.handler_for_extension(extension)
  if tracker.respond_to?(:supports_view_paths?)
    @trackers[handler] = tracker
  else
    @trackers[handler] = lambda { |name, template, _|
      tracker.call(name, template)
    }
  end
end

def self.remove_tracker(handler)
  @trackers.delete(handler)
end