#!/bin/sh
# Generates authoritative zone ConfigMap for svc.n0ball.tw from svc-records.yaml
# Usage: ./generate-zone.sh svc-records.yaml > coredns-auth-zone.yaml
set -e

RECORDS_FILE="${1:-svc-records.yaml}"
SERIAL=$(date +%Y%m%d%H)

cat <<EOF
apiVersion: v1
kind: ConfigMap
metadata:
  name: coredns-auth-zone
  namespace: authoritative-dns
data:
  svc.n0ball.tw.zone: |
    \$ORIGIN svc.n0ball.tw.
    @   3600 IN SOA ns1.n0ball.tw. admin.n0ball.tw. (
        ${SERIAL} ; serial
        3600       ; refresh
        600        ; retry
        86400      ; expire
        60         ; minimum
    )
    @   3600 IN NS ns1.n0ball.tw.
    @   3600 IN NS ns2.n0ball.tw.
EOF

awk '
/^[a-zA-Z0-9]/ && / IN / {
  printf "    %s\n", $0
}
' "$RECORDS_FILE"