#!/bin/sh
set -eu

temporary=$(mktemp)
trap 'rm -f -- "$temporary"' EXIT HUP INT TERM

crontab -l 2>/dev/null | grep -v 'postgres-backup.sh' > "$temporary" || true
printf '%s\n' '30 3 * * 0 flock -n /tmp/miem-postgres-backup.lock /srv/miem_workers/infra/postgres-backup.sh >/dev/null 2>&1' >> "$temporary"
crontab "$temporary"