#!/bin/bash

DOMAIN=$(expr match "$CERTBOT_DOMAIN" '.*\.\(.*\..*\)')
CHALLENGE_DOMAIN="_acme-challenge.${CERTBOT_DOMAIN}"
[[ -z ${DOMAIN} ]] && export DOMAIN=${CERTBOT_DOMAIN}
knotc zone-begin ${DOMAIN}
knotc zone-unset ${DOMAIN} _acme-challenge.${CERTBOT_DOMAIN}. TXT
knotc zone-commit ${DOMAIN}