entrypoint.sh
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entrypoint.sh
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	#!/usr/bin/env bash

	if [ "$(ls -A /usr/local/share/ca-certificates/)" ]; then
	update-ca-certificates
	fi

	# Prior art:
	# - https://github.com/renskiy/cron-docker-image/blob/5600db37acf841c6d7a8b4f3866741bada5b4622/debian/start-cron#L34-L36
	# - https://blog.knoldus.com/running-a-cron-job-in-docker-container/

	declare -p \| grep -Ev 'BASHOPTS\|BASH_VERSINFO\|EUID\|PPID\|SHELLOPTS\|UID' > /container.env

	{ for cron_job in "$@"; do echo -e "SHELL=/bin/bash
	BASH_ENV=/container.env
	${cron_job} > /proc/1/fd/1 2>/proc/1/fd/2"; done } \
	\| sed --regexp-extended 's/\\(.)/\1/g' \
	\| crontab -
	crontab -l
	exec cron -f -l -L 15