#!/bin/sh
#
# DKMS trigger. Used to add/build/install or remove the specified modules
# from all kernels.
# 
# Modules can be specified like:
#  dkms_modules="<modulename> <version> ..."
#
# Arguments:	$ACTION = [run/targets]
#		$TARGET = [post-install/pre-remove]
#		$PKGNAME
#		$VERSION
#		$UPDATE = [yes/no]
#
ACTION="$1"
TARGET="$2"
PKGNAME="$3"
VERSION="$4"
UPDATE="$5"

DKMS=usr/sbin/dkms

export PATH="$PATH:/usr/local/bin"

remove_modules()
{
	local _modver _kver

	# Remove the specified modules from all kernels.
	set -- ${dkms_modules}
	while [ $# -gt 0 ]; do
		$DKMS status -m "$1" | while read line; do
			if $(echo "$line" | egrep -vq '(added|built|installed)'); then
				shift; shift; continue
			fi
			_modver=$(echo "$line"|sed "s/$1,[[:blank:]]\([^,]*\)[,:].*/\1/;t;d")
			_kver=$(echo "$line"|awk '{print $3}'|sed "s/\(.*\),$/\1/")
			echo -n "Removing DKMS module '${1}-${_modver}' for kernel-${_kver}... "
			$DKMS remove -m "$1" -v "${_modver}" -k "${_kver}" >/dev/null 2>&1
			if [ $? -eq 0 ]; then
				echo "done."
			else
				echo "FAILED!"
			fi
		done
		shift; shift;
	done
}

add_modules()
{
	# Add/build and install the specified modules for all kernels.
	set -- ${dkms_modules}
	while [ $# -gt 0 ]; do
		$DKMS add -m "$1" -v "$2" >/dev/null 2>&1
		if [ $? -eq 0 ]; then
			echo "Added DKMS module '$1-$2'."
		else
			echo "Failed to add DKMS module: '$1-$2'..."
			err=1
		fi
		shift; shift;
	done
	[ -n "$err" ] && exit $err

	for f in $(echo lib/modules/*); do
		_kver=$(basename $f)
		if [ ! -e "${f}/build/include" ]; then
			echo "Skipping kernel-${_kver}. kernel-headers package not installed..."
			continue
		fi
		set -- ${dkms_modules}
		while [ $# -gt 0 ]; do
			echo -n "Installing DKMS module '$1-$2' for kernel-${_kver}... "
			$DKMS build -m "$1" -v "$2" -k "${_kver}" >/dev/null 2>&1 && \
				$DKMS install -m "$1" -v "$2" -k "${_kver}" >/dev/null 2>&1
			if [ $? -eq 0 ]; then
				echo "done."
			else
				echo "FAILED!"
				echo "DKMS module '$1-$2' failed to install, please do this manually"
				echo "and check for errors in the log file."
			fi
			shift; shift;
		done
	done
}

case "$ACTION" in
targets)
	echo "post-install pre-remove"
	;;
run)
	[ ! -x $DKMS -o -z "$dkms_modules" ] && exit 0

	case "$TARGET" in
	post-install)
		add_modules
		;;
	pre-remove)
		remove_modules
		;;
	*)
		exit 1
		;;
	esac
	;;
*)
	exit 1
	;;
esac

exit 0