run

#!/bin/sh

SUDO="sudo"

$SUDO 2>/dev/null

if [ "$?" = "127" ] # command sudo NOT found
then
	SUDO=""
fi

while :
do
	host_name=`cat config.json  | grep host_name | cut -f4 -d'"'`

	if [ "$host_name" != "" ]
	then
		$SUDO cp /etc/letsencrypt/live/$host_name/privkey.pem	https-privkey.pem
		$SUDO cp /etc/letsencrypt/live/$host_name/fullchain.pem	https-fullchain.pem

		uid=`id -u`
		gid=`id -g`

		$SUDO chown $uid:$gid https-privkey.pem

		chmod 400 https-privkey.pem
	fi

	if [ -e "./cmd/watchtower/watchtower" ]
	then
		./cmd/watchtower/watchtower
	else
		cd cmd/watchtower && go run .
	fi

	if [ "$?" = "123" ] # some error
	then
		alert_url=`cat config.json | grep watchtower_failure_alert_url | cut -f4 -d'"'`

		if [ "$alert_url" != "" ]
		then
			echo curl -v -d "'{\"error\":\"unknown\"}'" "'$alert_url'"
			curl -d "'{\"error\":\"unknown\"}'" "$alert_url"
		fi
	fi

	sleep 2
done