Linux kernel config sorter

kernel_config_sort.py

#!/usr/bin/env python3

# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at https://mozilla.org/MPL/2.0/.
#
# Copyright (C) 2024, Pandu POLUAN

import fileinput
import re


RE_CMT = re.compile(r"(\s*#\s*)?(?P<knob>CONFIG.*)")


def main() -> None:
    conf_lines: dict[str, str] = {}
    with fileinput.input(encoding="utf-8") as fin:
        for line in fin:
            line = line.strip()
            if not line:
                continue
            if not (m := RE_CMT.match(line)):
                continue
            conf_lines[m.group("knob")] = line
    for _, line in sorted(conf_lines.items()):
        print(line)


if __name__ == "__main__":
    main()