--domains-vpn-dns does not work on Ubuntu 24.04 LTS, seems trivial to fix

[gatopeich]

When using --domains-vpn-dns some.domain.com, I get the following:

WARNING: no split dns provider available; can't split dns

However it is a simple matter of running these two commands to have DNS working as expected:

sudo resolvectl dns tun0 dns0.tun0 dns1.tun0
sudo resolvectl domain tun0 some.domain.com

Can this be integrated so I don't have to run the resolvectl commands manually?

[gatopeich]

Here is my working solution, only changing a few lines at the end of do_connect():

    if args.vpn_domains is not None:
        if 'domain_vpn_dns' not in providers:
+            print("WARNING: no split dns provider available; trying resolvectl...", file=stderr)
+            print(subprocess.run(['resolvectl', 'dns', 'tun0', *map(str, env.dns)]).stdout, file=stderr)
+            for domain in args.vpn_domains:
+                print(subprocess.run(['resolvectl', 'domain', 'tun0', domain]).stdout, file=stderr)
        else:
            providers.domain_vpn_dns.configure_domain_vpn_dns(args.vpn_domains, env.dns)