code: def parse_gitconfig_dump(dump, cwd=None, multi_value=True):
      """Parse a dump-string from `git config -z --list`
  
      This parser has limited support for discarding unrelated output
      that may contaminate the given dump. It does so performing a
      relatively strict matching of configuration key syntax, and discarding
      lines in the output that are not valid git-config keys.
  
      There is also built-in support for parsing outputs generated
      with --show-origin (see return value).
  
      Parameters
      ----------
      dump : str
        Null-byte separated output
      cwd : path-like, optional
        Use this absolute path to convert relative paths for origin reports
        into absolute paths. By default, the process working directory
        PWD is used.
      multi_value : bool, optional
        If True, report values from multiple specifications of the
        same key as a tuple of values assigned to this key. Otherwise,
        the last configuration is reported.
  
      Returns:
      --------
      dict, set
        Configuration items are returned as key/value pairs in a dictionary.
        The second tuple-item will be a set of identifiers comprising all
        source files/blobs, if origin information was included
        in the dump (--show-origin). An empty set is returned otherwise.
        For actual files a Path object is included in the set, for a git-blob
        a Git blob ID prefixed with 'blob:' is reported.
      """
      cwd = Path(getpwd() if cwd is None else cwd)
      dct = {}
      fileset = set()
      for line in dump.split("\0"):
          # line is a null-delimited chunk
          k = None
          # in anticipation of output contamination, process within a loop
          # where we can reject non syntax compliant pieces
          while line:
              if line.startswith("file:") or line.startswith("blob:"):
                  fileset.add(line)
                  break
              if line.startswith("command line:"):
                  # no origin that we could as a pathobj
                  break
              # try getting key/value pair from the present chunk
              k, v = _gitcfg_rec_to_keyvalue(line)
              if k is not None:
                  # we are done with this chunk when there is a good key
                  break
              # discard the first line and start over
              ignore, line = line.split("\n", maxsplit=1)
              lgr.debug(
                  "Non-standard git-config output, ignoring: %s", ignore
              )
          if not k:
              # nothing else to log, all ignored dump was reported before
              continue
          # multi-value reporting
          present_v = dct.get(k, None)
          if present_v is None or not multi_value:
              dct[k] = v
          else:
              if isinstance(present_v, tuple):
                  dct[k] = present_v + (v,)
              else:
                  dct[k] = (present_v, v)
      # take blobs with verbatim markup
      origin_blobs = set(f for f in fileset if f.startswith("blob:"))
      # convert file specifications to Path objects with absolute paths
      origin_paths = set(
          Path(f[5:]) for f in fileset if f.startswith("file:")
      )
      origin_paths = set(
          f if f.is_absolute() else cwd / f for f in origin_paths
      )
      return dct, origin_paths.union(origin_blobs)
  
imports: import json
  import logging
  import os
  import re
  import threading
  import warnings
  from collections import namedtuple
  from fasteners import InterProcessLock
  from functools import lru_cache, wraps
  from pathlib import Path
  import datalad
  from datalad.consts import DATASET_CONFIG_FILE
  from datalad.runner import CommandError, GitRunner, KillOutput, StdOutErrCapture
  from datalad.utils import getpwd, on_windows
label_desc: Use image node_id 4 for calling a global function with example usage: parse_gitconfig_dump(dump, cwd, multi_value) and returns: dct,  origin_paths