#!/bin/sh
#
# Kernel hook for GRUB 2.
#
# Arguments passed to this script: $1 pkgname, $2 version.
#
PKGNAME="$1"
VERSION="$2"

[ -r boot/grub/grub.cfg ] \
	&& groot=$(awk '/^set root=/{print substr($2, 8, 3); exit}' \
		boot/grub/grub.cfg)
[ -e boot/grub/device.map ] && [ -n "${groot}" ] \
	&& dev=$(awk "/${groot}/{ print \$NF}" boot/grub/device.map)

if [ -n "$dev" -a -r "$dev" ]; then
	dd if="${dev}" bs=512 skip=0 count=1 2>/dev/null|grep -q GRUB
	[ $? -eq 0 ] && grub_installed=1
fi

if [ -z "$dev" -a -z "$grub_installed" ]; then
	exit 0
elif [ -n "$dev" -a -z "$grub_installed" ]; then
	echo "WARNING: GRUB2 has not been installed into $dev."
	echo "WARNING: please run 'grub-install $dev'."
else
	if command -v grub-mkconfig >/dev/null 2>&1; then
		grub-mkconfig -o boot/grub/grub.cfg
		exit $?
	fi
fi

exit 0