code: def add(self, paths: Union[str, Iterable[str]]) -> None:
      from scmrepo.exceptions import UnsupportedIndexFormat
  
      try:
          return self.scm.add(paths)
      except UnsupportedIndexFormat:
          link = "https://github.com/iterative/dvc/issues/610"
          add_cmd = self._make_git_add_cmd(
              [relpath(path) for path in paths]
          )
          logger.info("")
          msg = (
              f"failed to add, add manually using:\n\n{add_cmd}\n"
              f"\nSee {link} for more details.\n"
          )
          logger.warning(msg)
  
file_path: dvc/dvc/repo/scm_context.py
imports: import logging
  import shlex
  from contextlib import contextmanager
  from functools import wraps
  from typing import TYPE_CHECKING, Any, Dict, Iterable, Iterator, List, Optional, Set, Union
  from dvc.log import logger
  from dvc.utils import relpath
  from dvc.utils.collections import ensure_list
label_desc: Use image node_id 4 for calling the SCMContext obj's underlying member method code with example usage: obj.add(paths) and returns: self