Convert dnsmasq.conf to config entries suitable for /etc/config/dhcp in OpenWrt

convert_dnsmasq_conf_to_openwrt.py

"""
Converts cname, host-records, and dhcp-host entries from a dnsmasq config file
called dnsmasq.conf in the current working directory to corresponding lines
suitable for OpenWrt's /etc/config/dhcp config file.
"""
import re
from io import StringIO

def convert_dnsmasq_conf(filename):
    
    buff=StringIO()
    with open('dnsmasq.conf', 'r') as f:
        lines=f.readlines()

    for line in lines:
        line=line.strip() # remove leading and trailing whitespaces, e.g. the \n
        split = re.split('=|,',line)
        typ=split[0]
        if typ=='cname':
            buff.write('\nconfig cname\n')
            buff.write(f"\toption cname '{split[1]}'\n")
            buff.write(f"\toption target '{split[2]}'\n")
        elif typ=='host-record':
            buff.write('\nconfig domain\n')
            buff.write(f"\toption ip '{split[2]}'\n")
            buff.write(f"\toption name '{split[1]}'\n")
        elif typ=='dhcp-host':
            buff.write('\nconfig host\n')
            buff.write(f"\toption name '{split[2]}'\n")
            buff.write(f"\toption dns '1'\n")
            buff.write(f"\toption mac '{split[1]}'\n")
            buff.write(f"\toption ip '{split[3]}'\n")
            
    return buff.getvalue()

    
if __name__=="__main__":
    print(convert_dnsmasq_conf('dnsmasq.conf'))