code: def with_wget(url_dict=None, target_file=None):
      
  
      def wget_decorator(cls):
          def download_impl(self):
              """Download the selected version from the url_dict value."""
              t_file = target_file if target_file else self.SRC_FILE
              t_version = url_dict[self.version]
              Wget(t_version, t_file)
  
          @staticmethod
          def versions_impl():
              """Return a list of versions from the url_dict keys."""
              return list(url_dict.keys())
  
          cls.versions = versions_impl
          cls.download = download_impl
          return cls
  
      return wget_decorator
docs: Decorate a project class with wget-based version information.
  
      This adds two attributes to a project class:
          - A `versions` method that returns a list of available versions
            for this project.
          - A `repository` attribute that provides a repository string to
            download from later.
      We use the `git rev-list` subcommand to list available versions.
  
      Args:
          url_dict (dict): A dictionary that assigns a version to a download URL.
          target_file (str): An optional path where we should put the clone.
              If unspecified, we will use the `SRC_FILE` attribute of
              the decorated class.