code: def tmp_pre_commit_home() -> Generator[None, None, None]:
      
      before = os.environ.get('PRE_COMMIT_HOME')
      with tempfile.TemporaryDirectory() as tmpdir:
          os.environ['PRE_COMMIT_HOME'] = tmpdir
          try:
              yield
          finally:
              if before is None:
                  os.environ.pop('PRE_COMMIT_HOME', None)
              else:
                  os.environ['PRE_COMMIT_HOME'] = before
docs: During lots of autoupdates, many repositories will be cloned into the
      pre-commit directory.  This prevents leaving many MB/GB of repositories
      behind due to this autofixer.  This context creates a temporary directory
      so these many repositories are automatically cleaned up.