@classmethod
  def GetCachePath(cls):
    with cls.cachepath_lock:
      if not hasattr(cls, 'cachepath'):
        print("===================")
        print([cls.git_exe, 'config'] + cls._GIT_CONFIG_LOCATION + ['cache.cachepath'])
        print("===================")
        try:
          cachepath = subprocess.check_output(
              [cls.git_exe, 'config'] +
              cls._GIT_CONFIG_LOCATION +
              ['cache.cachepath']).strip()
          print("=====================")
          print(cachepath)
          print("=====================")
        except subprocess.CalledProcessError:
          cachepath = os.environ.get('GIT_CACHE_PATH', cls.UNSET_CACHEPATH)
        setattr(cls, 'cachepath', cachepath)

      ret = getattr(cls, 'cachepath')
      if ret is cls.UNSET_CACHEPATH:
        raise RuntimeError('No cache.cachepath git configuration or '
                           '$GIT_CACHE_PATH is set.')
      return ret