#!/bin/bash

# check for root privileges needed for gl-select
if [ ! $(id -u) -eq 0 ]; then
	echo "root privileges needed to run this pre-install script!"
	exit 1
fi

# is gl-select available?
if [ -x /usr/bin/gl-select ]; then
	printf '%b' "\033[33;1mNOTE: With the introduction of GLVND, gl-select is no
longer needed. This pre-install script will reset gl-select
to its default xorg setting if needed. It is recommended that
gl-select be uninstalled after installing libglvnd and
upgrading mesa3d.\033[0m\n"
	# is nvidia currently selected?
	if /usr/bin/gl-select status | grep -q 'nvidia.*is selected'; then
		/usr/bin/gl-select use xorg
	fi
fi