grub-sort-version

#!/usr/bin/python3
#
"""Script to sort kernel versions."""
import apt_pkg
import argparse
import re
import sys
import os
import typing

def order_index(order: list[re.Pattern[str]], abi: str) -> int:
    """Return the index of abi in order"""
    for i, entry in zip(range(len(order)), order):
        if entry.match(abi):
            return i
    return len(order)

class KernelABI:
    """Orderable kernel ABI string."""

def __init__(self, abi: str, order: list[re.Pattern[str]]):
        self.abi = abi
        self._index = order_index(order, self.abi)

def __lt__(self, other: "KernelABI") -> bool:
        if self._index != other._index:
            # Ordering is reversed, what should be considered highest comes first.
            return self._index > other._index
        return apt_pkg.version_compare(f"{self.abi}-0", f"{other.abi}-0") < 0

def main() -> None:
    """Entry point."""
    apt_pkg.init()

parser = argparse.ArgumentParser(
        prog="grub-sort-version", description="sort kernel ABIs"
    )
    parser.add_argument("-r", "--reverse", action="store_true")
    args = parser.parse_args()

order = []
    for flavour in os.environ.get("GRUB_FLAVOUR_ORDER", "").split():
        order.append(re.compile(f"[\\s\\S]*-{flavour}(\\s*\\d*)$"))

versions = [KernelABI(line.rstrip(), order) for line in sys.stdin]
    versions.sort(reverse=args.reverse)

for v in versions:
        print(v.abi)

if __name__ == "__main__":
    main()

docroot: /var/www/469ed2f6-4d4b-4a8a-9f5e-ee4ef04d3bc8/public_html

curdir: /usr/lib/grub

	.	4096
	..	4096
X	grub-mkconfig_lib	10342
X	grub-multi-install	12315
X	grub-sort-version	1481
	i386-pc	36864