how to hack wg-quick to work with systemd-resolved

gistfile1.txt

Or "Make wg-quick not dependent on resolvconf"

This is a hack. No guarantees. IMO, this script should test to see if systemd-resolved is being used (if this is so
'resolvectl --version' will respond) and if not use the resolvconf command. 

When this hack is done, wg-quick will work with NetworkManager cleanly as well. 
No need for openresolve if you are using systemd-resolved

find this section of /usr/bin/wg-quick and find these lines:

HAVE_SET_DNS=0
set_dns() {
	[[ ${#DNS[@]} -gt 0 ]] || return 0
	{ printf 'nameserver %s\n' "${DNS[@]}"
	  [[ ${#DNS_SEARCH[@]} -eq 0 ]] || printf 'search %s\n' "${DNS_SEARCH[*]}"
	} | cmd resolvconf -a "$(resolvconf_iface_prefix)$INTERFACE" -m 0 -x
	HAVE_SET_DNS=1
}

unset_dns() {
	[[ ${#DNS[@]} -gt 0 ]] || return 0
	cmd resolvconf -d "$(resolvconf_iface_prefix)$INTERFACE" -f
}

note the 2 resolvconf commands... if you have resolved installed and running you will not
have this command. Change the section to look like this:

HAVE_SET_DNS=0

set_dns() {
    [[ ${#DNS[@]} -gt 0 ]] || return 0
    local nameservers=$(IFS=" "; echo "${DNS[*]}")
    local searchdomains=$(IFS=","; echo "${DNS_SEARCH[*]}")
    if [[ -n $searchdomains ]]; then
        resolvectl dns "$INTERFACE" "$nameservers" --domain="$searchdomains"
    else
        resolvectl dns "$INTERFACE" "$nameservers"
    fi
    HAVE_SET_DNS=1
}

unset_dns() {
    [[ ${#DNS[@]} -gt 0 ]] || return 0
#    resolvectl reset "$INTERFACE"
#    'reset' doesn't work but commenting it out causes no problems
}