#!/bin/sh
# Runs backup.sh every day at BACKUP_HOUR:00 (in TZ, default UTC).
set -eu

hour="${BACKUP_HOUR:-3}"
echo "backup: daily at ${hour}:00 ${TZ:-UTC}, keeping ${BACKUP_KEEP_DAYS:-14} days, into /backups"
while true; do
  now="$(date +%s)"
  next="$(date -d "today ${hour}:00" +%s)"
  if [ "$next" -le "$now" ]; then next="$(date -d "tomorrow ${hour}:00" +%s)"; fi
  sleep "$((next - now))"
  /scripts/backup.sh || echo "backup: FAILED" >&2
done