openwrt-backup/openwrt_backup/prune.py

from pathlib import Path

from openwrt_backup.config import HOSTNAME, NUMBER


def get_all_but_last_n(p: Path, n: int, hostname):
    files = list(p.glob("*.tar.gz"))
    hostname_files = list(
        filter(lambda f: f.name.split("__")[HOSTNAME] == hostname, files)
    )
    sorted_files = sorted(
        hostname_files, key=lambda f: int(f.name.split("__")[NUMBER]), reverse=True
    )
    return sorted_files[n:]