# vim: set ft=sh :

(
RULESET=/var/lib/dhcpcd/outside-address.ruleset


reload_nftables() {
	systemctl reload nftables
}


write_ruleset() {
	install -d "${RULESET%/*}"
	printf 'define outside_address = %s\n' "${new_ip_address}" \
		> "${RULESET}"
}


if [ -n "${new_ip_address}" ]; then
	if [ ! -f "${ruleset}" ]; then
		write_ruleset
		reload_nftables
	elif [ "${new_ip_address}" != "${old_ip_address}" ]; then
		write_ruleset
		reload_nftables
	fi
fi
)