Firefox Jamf Install - Update Script

#!/bin/sh
#####################################################################################################
#
# ABOUT THIS PROGRAM
#
# NAME
#   FirefoxInstall.sh -- Installs or updates Firefox
#
# SYNOPSIS
#   sudo FirefoxInstall.sh
#
####################################################################################################
#
# HISTORY
#
#   Version: 1.0
#
#   - Joe Farage, 18.03.2015
#   - Chris Hansen, 14.05.2020 Some square brackets change to double square brackets
#
####################################################################################################
# Script to download and install Firefox.
# Only works on Intel systems.
#
# choose language (en-US, fr, de)
lang=""
# CHECK TO SEE IF A VALUE WAS PASSED IN PARAMETER 1 AND, IF SO, ASSIGN TO "lang"
if [[ "$4" != "" ]] && [[ "$lang" == "" ]]; then
    lang=$4
else
    lang="en-US"
fi

dmgfile="FF.dmg"
logfile="/Library/Logs/FirefoxInstallScript.log"

# Are we running on Intel?
if [ '`/usr/bin/uname -p`'="i386" -o '`/usr/bin/uname -p`'="x86_64" ]; then
    ## Get OS version and adjust for use with the URL string
    OSvers_URL=$( sw_vers -productVersion | sed 's/[.]/_/g' )

    ## Set the User Agent string for use with curl
    userAgent="Mozilla/5.0 (Macintosh; Intel Mac OS X ${OSvers_URL}) AppleWebKit/535.6.2 (KHTML, like Gecko) Version/5.2 Safari/535.6.2"

    # Get the latest version of Reader available from Firefox page.
    latestver=`/usr/bin/curl -s -A "$userAgent" https://www.mozilla.org/${lang}/firefox/new/ | grep 'data-latest-firefox' | sed -e 's/.* data-latest-firefox="\(.*\)".*/\1/' -e 's/\"//' | /usr/bin/awk '{print $1}'`
    echo "Latest Version is: $latestver"

    # Get the version number of the currently-installed FF, if any.
    if [[ -e "/Applications/Firefox.app" ]]; then
        currentinstalledver=`/usr/bin/defaults read /Applications/Firefox.app/Contents/Info CFBundleShortVersionString`
        echo "Current installed version is: $currentinstalledver"
        if [[ ${latestver} = ${currentinstalledver} ]]; then
            echo "Firefox is current. Exiting"
            exit 0
        fi
    else
        currentinstalledver="none"
        echo "Firefox is not installed"
    fi

    url="https://download.mozilla.org/?product=firefox-latest&os=osx&lang=en-US"

    echo "Latest version of the URL is: $url"
    echo "`date`: Download URL: $url" >> ${logfile}

    # Compare the two versions, if they are different or Firefox is not present then download and install the new version.
    if [[ "${currentinstalledver}" != "${latestver}" ]]; then
        /bin/echo "`date`: Current Firefox version: ${currentinstalledver}" >> ${logfile}
        /bin/echo "`date`: Available Firefox version: ${latestver}" >> ${logfile}
        /bin/echo "`date`: Downloading newer version." >> ${logfile}
        /usr/bin/curl -s -o /tmp/${dmgfile} ${url}
        /bin/echo "`date`: Mounting installer disk image." >> ${logfile}
        /usr/bin/hdiutil attach /tmp/${dmgfile} -nobrowse -quiet
        /bin/echo "`date`: Installing..." >> ${logfile}
        ditto -rsrc "/Volumes/Firefox/Firefox.app" "/Applications/Firefox.app"

        /bin/sleep 10
        /bin/echo "`date`: Unmounting installer disk image." >> ${logfile}
        /usr/bin/hdiutil detach $(/bin/df | /usr/bin/grep Firefox | awk '{print $1}') -quiet
        /bin/sleep 10
        /bin/echo "`date`: Deleting disk image." >> ${logfile}
        /bin/rm /tmp/${dmgfile}

        #double check to see if the new version got updated
        newlyinstalledver=`/usr/bin/defaults read /Applications/Firefox.app/Contents/Info CFBundleShortVersionString`
        if [[ "${latestver}" = "${newlyinstalledver}" ]]; then
            /bin/echo "`date`: SUCCESS: Firefox has been updated to version ${newlyinstalledver}" >> ${logfile}
       # /Library/Application\ Support/JAMF/bin/jamfHelper.app/Contents/MacOS/jamfHelper -windowType hud -title "Firefox Installed" -description "Firefox has been updated." &
        else
            /bin/echo "`date`: ERROR: Firefox update unsuccessful, version remains at ${currentinstalledver}." >> ${logfile}
            /bin/echo "--" >> ${logfile}
            exit 1
        fi

    # If Firefox is up to date already, just log it and exit.
    else
        /bin/echo "`date`: Firefox is already up to date, running ${currentinstalledver}." >> ${logfile}
        /bin/echo "--" >> ${logfile}
    fi
else
    /bin/echo "`date`: ERROR: This script is for Intel Macs only." >> ${logfile}
fi

exit 0