Function clean_cache

methods.py:895–928

(cache_path: str, cache_limit: int, verbose: bool)

def clean_cache(cache_path: str, cache_limit: int, verbose: bool) -> None:
    if not cache_limit:
        return

    files = glob.glob(os.path.join(cache_path, "*", "*"))
    if not files:
        return

    # Store files in list of (filename, size, atime).
    stats = []
    for file in files:
        try:
            stats.append((file, *os.stat(file)[6:8]))
        except OSError:
            print_error(f'Failed to access cache file "{file}"; skipping.')

    # Sort by most recent access (most sensible to keep) first. Search for the first entry where
    # the cache limit is reached.
    stats.sort(key=lambda x: x[2], reverse=True)
    sum = 0
    for index, stat in enumerate(stats):
        sum += stat[1]
        if sum > cache_limit:
            purge = [x[0] for x in stats[index:]]
            count = len(purge)
            for file in purge:
                try:
                    os.remove(file)
                except OSError:
                    print_error(f'Failed to remove cache file "{file}"; skipping.')
                    count -= 1
            if verbose and count:
                print_info(f"Purged {count} file{'s' if count else ''} from cache.")
            break


def prepare_cache(env) -> None: