#!/bin/sh
# Entry point for the `backup` sidecar container. Runs db-backup.sh on a fixed
# interval (default: daily). Kept deliberately simple — a sleep loop instead of a
# cron daemon — so it works in a bare postgres:16-alpine image.
set -eu

INTERVAL="${BACKUP_INTERVAL_SECONDS:-86400}"   # 86400 = once a day
echo "[backup] sidecar started; interval=${INTERVAL}s, keep=${BACKUP_KEEP:-14}, dir=${BACKUP_DIR:-/backups}"

# Take one backup shortly after start so a freshly-deployed stack has an
# immediate restore point instead of waiting a whole interval.
sleep 20
while true; do
  sh /scripts/db-backup.sh || echo "[backup] run failed; will retry next interval" >&2
  sleep "$INTERVAL"
done