dnsgrep-gc.sh

#!/usr/bin/env bash
#
# Searches a Google Cloud DNS record set

# Author: William Albert (@walbert947)

# (NOTE: The program depends on the Google Cloud SDK.)
#
# 

# The DNS zone to search
dns_zone='example-com'

show_help() {
  cat << EOF
Usage: ${0##*/} [-h] [-z DNS_ZONE] SEARCH_TERM

Search a Google Cloud DNS record set for a particular term. Partial matches
are supported. If DNS_ZONE is not specified, a hard-coded default will be
used.

    -h            display this help and exit
    -z DNS_ZONE   Use DNS_ZONE as the zone to search
EOF
}

OPTIND=1

while getopts "hz:" opt; do
  case "${opt}" in
    h)
      show_help
      exit 0
      ;;
    z)
      dns_zone=$OPTARG
      ;;
    \?)
      show_help >&2
      exit 1
      ;;
  esac
done

shift $((OPTIND-1))

if [[ "$#" -ne 1 ]]; then
  echo "${0##*/}: No search term specified" >&2
  echo "Try ${0##*/} -h for more information."
  exit 1
fi

gcloud dns record-sets list -z "${dns_zone}" | grep --color -F "$1"