code: def init(path):
      dvcignore = os.path.join(path, DvcIgnore.DVCIGNORE_FILE)
      if os.path.exists(dvcignore):
          return dvcignore
  
      with open(dvcignore, "w", encoding="utf-8") as fobj:
          fobj.write(
              "# Add patterns of files dvc should ignore, which could improve\n"
              "# the performance. Learn more at\n"
              "# https://dvc.org/doc/user-guide/dvcignore\n"
          )
  
      return dvcignore
  
imports: import os
  import re
  from collections import namedtuple
  from itertools import chain, groupby, takewhile
  from typing import TYPE_CHECKING, List, Optional
  from pathspec.patterns import GitWildMatchPattern
  from pathspec.util import normalize_file
  from pygtrie import Trie
  from dvc.fs import Schemes, localfs
  from dvc.log import logger
  from dvc.pathspec_math import PatternInfo, merge_patterns
label_desc: Use image node_id 2 for calling a global function with example usage: init(path) and returns: dvcignore, dvcignore