Generates dnsmasq config file that consists of lines like "ipset=/example.com/ipset", bases on text file you providing. Basically adds "ipset=/" + your line + "/" + $ipsetName. Supports comments "#"

dnsmasq_get_ipsets.py

import argparse


def main(input_filename: str, output_filename: str, ipset_name: str, is_file_append: bool) -> None:
    input_file = open(input_filename, "r", encoding="utf-8")
    output_file = open(output_filename, "a" if is_file_append else "w", encoding="utf-8")
    
    while True:
        line = input_file.readline()
        if not line:
            break
        comment_start = line.find("#")
        if comment_start != -1:
            line = line[0:comment_start]
        line = line.strip()
        line = line.lower()

        if not line: 
            continue

        output_file.write(f"ipset=/{line}/{ipset_name}\n")
        
    input_file.close()
    output_file.close()

if __name__ == "__main__":
    parser = argparse.ArgumentParser(
        prog="dnsmasq_gen_ipsets",
        description=(
            "Generates dnsmasq config file that consists of lines like "
            '"ipset=/example.com/ipset", bases on text file you providing. '
            'Basically adds "ipset=/" + your line + "/" + $ipsetName.\n\n'
            'Supports comments "#"'
        ),
        epilog="Made for you by NukDokPlex"
    )

    parser.add_argument(
        "-i", "--input",
        dest="input_filename",
        required=True,
        help="Input file"
    )

    parser.add_argument(
        "-o", "--output",
        dest="output_filename",
        required=True,
        help="Output file"
    )

    parser.add_argument(
        "-s", "--ipset",
        dest="ipset_name",
        required=True,
        help="ipset name"
    )

    parser.add_argument(
        "-a", "--append",
        dest="is_file_append",
        default=False,
        action="store_true"
    )

    args = parser.parse_args()
    main(**args.__dict__)