def _get_cache_dir()

in lib/litani.py [0:0]

• 31 lines of code
• 6 McCabe index (conditional complexity)

def _get_cache_dir(path=os.getcwd()):
    def cache_pointer_dirs():
        current = pathlib.Path(path).resolve(strict=True)
        yield current
        while current.parent != current:
            current = current.parent
            yield current

    for possible_dir in cache_pointer_dirs():
        logging.debug(
            "Searching for cache pointer in %s", possible_dir)
        possible_pointer = possible_dir / CACHE_POINTER
        try:
            if possible_pointer.exists():
                logging.debug(
                    "Found a cache pointer at %s", possible_pointer)
                with open(possible_pointer) as handle:
                    pointer = handle.read().strip()
                possible_cache = pathlib.Path(pointer)
                if possible_cache.exists():
                    logging.debug("cache is at %s", possible_cache)
                    return possible_cache
                logging.warning(
                    "Found a cache file at %s pointing to %s, but that "
                    "directory does not exist. Continuing search...",
                    possible_pointer, possible_cache)
        except PermissionError:
            pass

    logging.error(
        "Could not find a pointer to a litani cache. Did you forget "
        "to run `litani init`?")
    raise FileNotFoundError