Wireguard firmware sustain script

wg.sh

#!/bin/bash -e
BOARD=e300
if [ ! $(dpkg-query --show wireguard) ]; then
	tag=$(curl "https://api.github.com/repos/Lochnair/vyatta-wireguard/releases" | jq -r '.[0].tag_name')
	deb_url="https://github.com/Lochnair/vyatta-wireguard/releases/download/$tag/wireguard-$BOARD-$tag-1.deb"
	curl -L -o "/tmp/wireguard-$BOARD-$tag.deb" "$deb_url"
	dpkg -i "/tmp/wireguard-$BOARD-$tag.deb"
	rm "/tmp/wireguard-$BOARD-$tag.deb"
	source /opt/vyatta/etc/functions/script-template
	configure
	#load - direct command trigger because load seems to not be defined in script-template
	/opt/vyatta/sbin/vyatta-load-config.pl
	commit
	exit
fi