#!/bin/bash
# Copyright (c) 2020 Gitpod GmbH. All rights reserved.
# Licensed under the GNU Affero General Public License (AGPL).
# See License-AGPL.txt in the project root for license information.


DRIVER_NAME=shiftfs
DRIVER_VERSION=1.2
ARCH=$(uname -m)
KERNEL_RELEASE=$(uname -r)
KERNEL_VERSION=$(uname -v | sed 's/#\([[:digit:]]\+\).*/\1/')

if lsmod | grep $DRIVER_NAME; then
    echo "shiftfs is already loaded - nothing to do here"
    exit 0
fi

set -ex
mkdir -p /lib/modules/${KERNEL_RELEASE}
ln -s /usr/src_node/linux-headers-${KERNEL_RELEASE} /lib/modules/${KERNEL_RELEASE}/build
dkms install -m ${DRIVER_NAME} -v ${DRIVER_VERSION} -k $KERNEL_RELEASE --kernelsourcedir /usr/src_node/linux-headers-${KERNEL_RELEASE}
insmod /var/lib/dkms/${DRIVER_NAME}/${DRIVER_VERSION}/${KERNEL_RELEASE}/${ARCH}/module/${DRIVER_NAME}.ko