#!/bin/bash

if [ $UID -ne 0 ]; then
	echo "Keine Rootrechte."
	exit 1
fi

set -Eeuo pipefail

RESTART=
echo "Synchronisiere Repositorys"
xbps-install -S > /dev/null

mapfile -t updatedpkgs < <(xbps-install -un|awk '{print $1}')
if [[ "${#updatedpkgs[@]}" -eq 0 ]]; then
	echo "Keine Updates"
	exit
else
	echo "${updatedpkgs[@]}"
	echo "Es sind Updates da!"
	while read -p "Installieren? [Y/n] " answer; do
		test -z "${answer}" && answer="y"
		case "${answer}" in
			n*|N*|*o|*O)
				exit
			;;
			y*|Y*|j*|J*)
				break
			;;
		esac
	done
fi

echo "Lege Snapshot an."
void-snapshot update

echo "Entferne nicht benutzte Pakete"
xbps-remove -oy > /dev/null

echo "Räume den Cache auf"
xbps-remove -Oy > /dev/null

echo "Installiere Updates"
if ! xbps-install -uy; then
	echo "Update failed."
	exit
fi

if [[ "$(xcheckrestart)" ]]; then
	RESTART=1
fi

for i in "${updatedpkgs[@]}"; do
	if grep -q "^linux" <<< "${i}"; then
		vkpurge list | head -n -1 | xargs -r vkpurge rm
		RESTART=1
	fi
done

if [[ "${RESTART}" ]]; then
	echo ""; echo "Bitte den Computer neu starten."
fi

echo ""
echo "Update fertig."