Delete DNS zone and its records at Google Cloud Platform

destroy-gcp-dns.sh

#!/bin/bash
set -eo pipefail

DNS_ZONE_NAME="example-dns-zone"
echo -e "Destroying dns zone ($DNS_ZONE_NAME)...\n"

# Purge all DNS records
DNS_RECORDS=$(gcloud dns record-sets list --zone=$DNS_ZONE_NAME --format=json | jq '. | 
    map(select(.type != ("NS") and .type != ("SOA")))')
    
gcloud dns record-sets transaction start --zone=$DNS_ZONE_NAME
for row in $(echo "${DNS_RECORDS}" | jq -r '.[] | @base64'); do
    _jq() {
        echo ${row} | base64 --decode | jq -r ${1}
    }

    gcloud dns record-sets transaction remove "$(_jq '.rrdatas[0]')" \
        --name=$(_jq '.name') --ttl=$(_jq '.ttl') --type=$(_jq '.type') \
        --zone=$DNS_ZONE_NAME
done
gcloud dns record-sets transaction execute --zone=$DNS_ZONE_NAME

# Delete DNS zone
gcloud dns managed-zones delete $DNS_ZONE_NAME