#!/bin/sh
set -eu
umask 077

if [ "$#" -ne 1 ] || [ ! -f "$1" ]; then
  echo "Aufruf: scripts/restore.sh backups/backup_YYYY-MM-DD_HHMM.sql.gz" >&2
  exit 1
fi
WORK=$(mktemp -d)
trap 'rm -rf "$WORK"' EXIT
trap 'exit 1' HUP INT TERM
# Decompress completely before touching the target database. SQL errors roll
# back the entire restore rather than leaving a partially restored database.
gzip -dc "$1" > "$WORK/dump.sql"
test -s "$WORK/dump.sql"
docker compose exec -T db sh -c 'exec psql --single-transaction -v ON_ERROR_STOP=1 -U "$POSTGRES_USER" -d "$POSTGRES_DB"' < "$WORK/dump.sql"
echo "Wiederherstellung abgeschlossen."