scripts/ncp-upgrade-check.sh

#!/bin/sh
#
#    Copyright (c) 2016 Nest, Inc.
#    All rights reserved.
#
#    This document is the property of Nest. It is considered
#    confidential and proprietary information.
#
#    This document may not be reproduced or transmitted in any form,
#    in whole or in part, without the express written permission of
#    Nest.
#
#    Description:
#      This script is for checking to see if the NCP firmware
#      needs to be updated.
#

usage() {
    echo "Usage:"                                                      1>&2
    echo "    $0 [firmware-image-path] [installed-ncp-version-string]" 1>&2
    exit 1
}

if [ $# = 0 ]
then usage
fi

FIRMWARE_IMAGE="$1"
shift

if [ $# = 0 ]
then
    strings "${FIRMWARE_IMAGE}" | grep -i '^[A-Z0-9]*/.*;.*$'
    exit 1
fi

FIRMWARE_VERSION="$@"

if grep "${FIRMWARE_VERSION}" "${FIRMWARE_IMAGE}" 1>/dev/null 2>/dev/null
then
    echo "NCP firmware is up-to-date." 1>&2
    exit 1 # Firmware update not necessary
else
    echo "NCP firmware IS OUT OF DATE." 1>&2
    exit 0 # Firmware update IS necessary
fi