code: def test_import_git_dir(tmp_dir, scm, dvc, git_dir, src_is_dvc):
      if src_is_dvc:
          git_dir.init(dvc=True)
  
      git_dir.scm_gen(
          {"src": {"file.txt": "hello"}}, commit="add a dir"
      )
  
      stage = dvc.imp(os.fspath(git_dir), "src", "dst")
  
      assert (tmp_dir / "dst").read_text() == {"file.txt": "hello"}
      assert tmp_dir.scm.is_ignored(os.fspath(tmp_dir / "dst"))
      assert stage.deps[0].def_repo == {
          "url": os.fspath(git_dir),
          "rev_lock": git_dir.scm.get_rev(),
      }
  
imports: import filecmp
  import os
  import pytest
  from funcy import first
  from dvc.cachemgr import CacheManager
  from dvc.config import NoRemoteError
  from dvc.dvcfile import load_file
  from dvc.fs import system
  from dvc.scm import Git
  from dvc.stage.exceptions import StagePathNotFoundError
  from dvc.testing.tmp_dir import make_subrepo
  from dvc.utils.fs import remove
  from dvc_data.index.index import DataIndexDirError
label_desc: Use image node_id 4 for calling a global function with example usage: test_import_git_dir(tmp_dir, scm, dvc, git_dir, src_is_dvc) without return types