Generate M3U files for CHD ROMs in a directory

chd-m3u.py

import os
import re

CHD_DIR = "/path/to/chds"

chds = [*filter(lambda i: i.endswith(".chd"), os.listdir(CHD_DIR))]
games = set(name[:name.find("(")] for name in chds)

for game in games:
    m3u_list = [chd + "\n" for chd in chds if game in chd]
    if game_match := re.search(r"\(Disc.*$",  m3u_list[0]): # multi-disc
        m3u_name = m3u_list[0][:game_match.start() - 1] + ".m3u"
    else: # single-disc
        m3u_name = m3u_list[0].replace(".chd", ".m3u")
    with open(os.path.join(CHD_DIR, m3u_name), "w") as m3u:
        m3u.writelines(m3u_list)