#!/bin/sh
set -eu

: "${BACKUP_FILE:?Set BACKUP_FILE to a PostgreSQL custom-format dump}"

if [ ! -f "$BACKUP_FILE" ]; then
  printf '%s\n' "Backup file not found: $BACKUP_FILE" >&2
  exit 1
fi

if [ ! -s "$BACKUP_FILE" ]; then
  printf '%s\n' "Backup file is empty: $BACKUP_FILE" >&2
  exit 1
fi

docker compose -f compose.production.yaml run --rm -T postgres \
  pg_restore --list < "$BACKUP_FILE" >/dev/null

printf '%s\n' "Backup archive is readable: $BACKUP_FILE"