#!/usr/bin/env sh
set -eu
container="${1:?Usage: backup.sh CONTAINER OUTPUT_FILE}"
output="${2:?OUTPUT_FILE required}"
[ ! -e "$output" ] || { echo 'Output already exists' >&2; exit 1; }
temporary="/tmp/evofw-backup-$(date +%s)-$$.db"
cleanup() { docker exec "$container" rm -f "$temporary" >/dev/null 2>&1 || true; }
trap cleanup EXIT HUP INT TERM
docker exec "$container" sh -ec 'node tools/sqlite-backup.mjs backup "${DATABASE_URL#sqlite:}" "$1"' sh "$temporary"
docker cp "$container:$temporary" "$output.partial"
mv "$output.partial" "$output"