Script for launch dehydrated (Let's Encrypt) with crontab

cron.dehydrated.sh

#!/bin/bash
set -uo pipefail
IFS=$'\n\t'

# 0 12 * * 1 /etc/dehydrated/cron.dehydrated.sh

# From: https://serverfault.com/a/512780
# From: https://stackoverflow.com/a/41943779
if tty -s; then
	exec 5>&1
else
	exec 5>/dev/null
fi


if [[ "$EUID" -ne 0 ]]; then
	echo "Error! You need to run this as root"
	exit 1
fi


cd "$(dirname "$0")" || exit 1
PREFIX="[SSL $(hostname)]"


retOut=$(./dehydrated --cron 2>&1 |tee /dev/fd/5; exit "${PIPESTATUS[0]}")
retVal=$?
if [ $retVal -ne 0 ]; then
	echo "$retOut" | mail -s "$PREFIX Error Let's Encrypt" root
	exit 1
fi


TOTAL=$(echo "$retOut" | grep -c 'Renewing!')
if [ "$TOTAL" -eq 0 ]; then
	exit 0
fi


retOut=$(systemctl reload nginx 2>&1 |tee /dev/fd/5; exit "${PIPESTATUS[0]}")
retVal=$?
if [ $retVal -ne 0 ]; then
	echo "$retOut" | mail -s "$PREFIX Error Nginx" root
	exit 1
fi


retOut=$(./dehydrated --cleanup 2>&1 |tee /dev/fd/5; exit "${PIPESTATUS[0]}")
retVal=$?
if [ $retVal -ne 0 ]; then
	echo "$retOut" | mail -s "$PREFIX Warning cleanup" root
	exit 1
fi


echo "$TOTAL domains renewed" | mail -s "$PREFIX Success!" root