Minimal notification service for Avahi services

avahi-notify.py

#!/usr/bin/env python
"""
example use:

./avahi-notify.py - notify for all interfaces
./avahi-notify.py eth0 - notify only for eth0 interface
"""
import io
import subprocess
import sys

if __name__ == "__main__":
    ifaces = sys.argv[1:]
    avahi = subprocess.Popen(["avahi-browse", "-pa"], stdout=subprocess.PIPE)
    for line in io.TextIOWrapper(avahi.stdout, encoding="utf-8"):
        (state, iface, proto, name, stype, domain) = line.split(";")

        if ifaces and iface not in ifaces:
            continue

        icon = ()
        if state == "+":
            icon = ("-i", "list-add")
            title = f"Connected {stype} ({proto})"
        elif state == "-":
            icon = ("-i", "list-remove")
            title = f"Disconnected {stype} ({proto})"

        p = subprocess.run(("notify-send", *icon, title, name))