#!/bin/sh

set -e

NAMESERVERS="$(kdig -4 +short @ns.bfh.science ns.bfh.science)"
ZONE="$(cat /etc/hostname | awk -F. '{ print $(NF-1) "." $NF}')"

for NAMESERVER in ${NAMESERVERS}
do
	echo -n " + Deleting TXT record (_acme-challenge.${DOMAIN})..."

	NSUPDATE="$(mktemp nsupdate.XXXX)"

cat > "${NSUPDATE}" << EOF
server ${NAMESERVER}
zone ${ZONE}
ttl 300
update delete _acme-challenge.${DOMAIN} 300 TXT ${TOKEN_VALUE}
send
EOF

	knsupdate "${NSUPDATE}"
	rm -f "${NSUPDATE}"

	echo " done."
done