"""Selects the release files to remove: all but the newest versions, never one in use.

Usage: python3 tools/release_files.py <keep> <in-use>... -- <name>...
Prints the names to remove, one per line.
"""
import re
import sys

VERSION = re.compile(r"(\d+(?:\.\d+)+)")


def version(name):
    match = VERSION.search(name)
    return tuple(int(part) for part in match.group(1).split(".")) if match else None


def to_remove(names, keep=2, in_use=()):
    versioned = sorted((n for n in names if version(n) is not None), key=version, reverse=True)
    return [n for n in versioned[keep:] if n not in set(in_use)]


if __name__ == "__main__":
    args = sys.argv[1:]
    split = args.index("--")
    for name in to_remove(args[split + 1:], int(args[0]), args[1:split]):
        print(name)