code: def get_root(directory):
      
      command = ['git', 'rev-parse', '--show-toplevel']
      try:
          output = run_command(directory, command, env_var=False)
      except CalledProcessError as exc:
          raise GitError('Failed to find local git repository root in {}.'.format(repr(directory)), exc.output)
      if IS_WINDOWS:
          output = output.replace('/', '\\')
      return output.strip()
docs: Get root directory of the local git repo from any subdirectory within it.
  
      :raise GitError: If git command fails (dir not a git repo?).
  
      :param str directory: Subdirectory in the local repo.
  
      :return: Root directory of repository.
      :rtype: str