#!/bin/bash
#
# Usage: ./install-dkms [640 480]

set -e
REPO_PATH="$(/usr/bin/dirname $([ -L $0 ] && /bin/readlink -f $0 || echo $0))"
source "${REPO_PATH}/install.common"
check_if_installed

generate_dkms_conf() {
    local target="$*"
    cat <<EOF > "${target}"
PACKAGE_NAME="${V4L2_LOOPBACK_DC}"
PACKAGE_VERSION="${V4L2_LOOPBACK_VERSION}"
CLEAN="make clean"
MAKE[0]="make all KVERSION=$kernelver"
BUILT_MODULE_NAME[0]="${V4L2_LOOPBACK_KM}"
DEST_MODULE_LOCATION[0]="/updates"
AUTOINSTALL="yes"
EOF
}

setup_dkms_module() {
    # Copying module dir with name expected by dkms in /usr/src
    if [ -d "/usr/src/${V4L2_LOOPBACK_DC}-${V4L2_LOOPBACK_VERSION}" ] || [ -L "/usr/src/${V4L2_LOOPBACK_DC}-${V4L2_LOOPBACK_VERSION}" ]; then
        rm -Rf "/usr/src/${V4L2_LOOPBACK_DC}-${V4L2_LOOPBACK_VERSION}"
    fi
    cp -a "${REPO_PATH}/${V4L2_LOOPBACK_DIR}" "/usr/src/${V4L2_LOOPBACK_DC}-${V4L2_LOOPBACK_VERSION}"
    chown root:root "/usr/src/${V4L2_LOOPBACK_DC}-${V4L2_LOOPBACK_VERSION}" -R
    generate_dkms_conf "/usr/src/${V4L2_LOOPBACK_DC}-${V4L2_LOOPBACK_VERSION}/dkms.conf"

    dkms build -m ${V4L2_LOOPBACK_DC} -v ${V4L2_LOOPBACK_VERSION}
    dkms install -m ${V4L2_LOOPBACK_DC} -v ${V4L2_LOOPBACK_VERSION}
    if [ -f /etc/redhat-release ]; then
        dkms mkrpm -m ${V4L2_LOOPBACK_DC} -v ${V4L2_LOOPBACK_VERSION}
    elif [ -f /etc/debian_version ]; then
        dkms mkdeb -m ${V4L2_LOOPBACK_DC} -v ${V4L2_LOOPBACK_VERSION}
    else
        echo "unsupported distro"
        exit 1
    fi
}

copy_uninstall_script() {
    echo "Adding uninstall script in '/opt/droidcam-uninstall'"
    mkdir -p /opt || true
    cp "${REPO_PATH}/uninstall-dkms" /opt/droidcam-uninstall
}

# Here we go
check_module_options "$1" "$2"

copy_uninstall_script
setup_dkms_module
register_video_module_at_boot_time

# Finally let's load the module
modprobe ${V4L2_LOOPBACK_DC}

echo 'Done'


