Allows angular templates to reload

gistfile1.rb

class Sprockets::DirectiveProcessor
      # This is basically copied from https://github.com/sstephenson/sprockets/blob/master/lib/sprockets/directive_processor.rb#L289
      def process_depend_on_tree_directive(path = ".")
        if relative?(path)
          root = pathname.dirname.join(path).expand_path

          unless (stats = stat(root)) && stats.directory?
            raise ArgumentError, "depend_on_tree argument must be a directory"
          end

          context.depend_on(root)

          each_entry(root) do |pathname|                        
            context.depend_on(pathname)
          end
        else
          # The path must be relative and start with a `./`.
          raise ArgumentError, "depend_on_tree argument must be a relative path"
        end
      end
end