nsupdate wrapper thing

dns-update.sh

#!/bin/bash

set -eo pipefail

ZONE="$1";
if ! shift; then
	echo "Usage: $0 ZONE"
	exit
fi

UPDATES="$(mktemp --suffix .nsupdate)"
trap 'rm -- "$UPDATES"' EXIT

{
SOA="$(dig +noall +short "$ZONE" IN SOA)"

echo "server ${SOA%% *}"
echo "zone $ZONE"
echo "ttl ${SOA##* }"
echo "prereq yxrrset $ZONE IN SOA $SOA"
echo ""
case "$1" in
	*.*)
		echo "update delete" "$@"
		dig +noall +nottl +answer "$@" | sed "s/^/update add /"
		;;
	update|add|del|delete|prereq)
		echo "$@"
		;;
esac
echo ""
echo "show"
echo "send"
echo "answer"
} > "$UPDATES"
sensible-editor "$UPDATES"
nsupdate -k "$HOME/.config/nsupdate/$ZONE.key" "$UPDATES"