deadhead-space-freight-tycoon/deploy/backup/schedule.sh

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#!/bin/sh
# Runs backup.sh every day at BACKUP_HOUR:00 (in TZ, default UTC).
set -eu
hour="${BACKUP_HOUR:-3}"
echo "backup: daily at ${hour}:00 ${TZ:-UTC}, keeping ${BACKUP_KEEP_DAYS:-14} days, into /backups"
while true; do
now="$(date +%s)"
next="$(date -d "today ${hour}:00" +%s)"
if [ "$next" -le "$now" ]; then next="$(date -d "tomorrow ${hour}:00" +%s)"; fi
sleep "$((next - now))"
/scripts/backup.sh || echo "backup: FAILED" >&2
done