Merge pull request #196147 from Mic92/systemd-boot-delete-old-specialisation

def remove_old_entries(gens: List[SystemIdentifier]) -> None:

    rex_profile = re.compile("^@efiSysMountPoint@/loader/entries/nixos-(.*)-generation-.*\.conf$")

    rex_generation = re.compile("^@efiSysMountPoint@/loader/entries/nixos.*-generation-(.*)\.conf$")

    rex_generation = re.compile("^@efiSysMountPoint@/loader/entries/nixos.*-generation-([0-9]+)(-specialisation-.*)?\.conf$")

    known_paths = []

    for gen in gens:

        known_paths.append(copy_from_profile(*gen, "kernel", True))

        known_paths.append(copy_from_profile(*gen, "initrd", True))

    for path in glob.iglob("@efiSysMountPoint@/loader/entries/nixos*-generation-[1-9]*.conf"):

        try:

        if rex_profile.match(path):

            prof = rex_profile.sub(r"\1", path)

        else:

                prof = "system"

            prof = None

        try:

            gen_number = int(rex_generation.sub(r"\1", path))

            if not (prof, gen_number) in gens:

                os.unlink(path)

        except ValueError:

            pass

            continue

        if not (prof, gen_number, None) in gens:

            os.unlink(path)

    for path in glob.iglob("@efiSysMountPoint@/efi/nixos/*"):

        if not path in known_paths and not os.path.isdir(path):

            os.unlink(path)