code: def tag(message):
      # type: () -> None
      
      release_ver = versioning.current()
      message = message or 'v{} release'.format(release_ver)
  
      with conf.within_proj_dir():
          log.info("Creating release tag")
          git.tag(
              author=git.latest_commit().author,
              name='v{}'.format(release_ver),
              message=message,
          )
docs: Tag the current commit with the current version.