#!/usr/bin/env bash # Copyright (c) 2021 Egor Tensin <Egor.Tensin@gmail.com> # This file is part of the "cgitize" project. # For details, see https://github.com/egor-tensin/cgitize. # Distributed under the MIT License. set -o errexit -o nounset -o pipefail shopt -s inherit_errexit lastpipe schedule_to_cron() { local schedule for schedule; do case "$schedule" in 15min) echo '*/15 * * * *' ;; hourly) echo '0 * * * *' ;; daily) echo '0 0 * * *' ;; weekly) echo '0 0 * * 1' ;; monthly) echo '0 0 1 * *' ;; *) echo "$schedule" ;; esac done } make_task_script() { echo "#!/bin/bash cd -- "$( pwd )" && $( printf -- ' %q' "$@" )" } setup_cron_task() { local schedule schedule="${SCHEDULE:-once}" if [ "$schedule" = once ]; then exec "$@" fi schedule="$( schedule_to_cron "$schedule" )" make_task_script "$@" > /task.sh chmod +x /task.sh # Run the task once when the container is started, regardless of schedule. /task.sh local crontab crontab="$schedule /task.sh # This is the new crontab." echo "$crontab" | crontab - exec crond -f } main() { setup_cron_task "$@" } main "$@"