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balenaEtcher.sh
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balenaEtcher.sh
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#!/bin/sh
####################################################################################################
# #
# ABOUT THIS PROGRAM #
# #
# NAME #
# balenaEtcher #
# #
# SYNOPSIS #
# sudo balena-etcher.sh #
# #
####################################################################################################
# #
# HISTORY #
# Version: 1.1 #
# #
# - 1.0 Martyn Watts, 30.09.2021 Initial Build
# - 1.1 Martyn Watts, 03.12.2012 Changed the /tmp paths to /Library/Caches/com.purplecomputing.mdm/ #
# #
####################################################################################################
####################################################################################################
# Program Variables #
####################################################################################################
# The version of this script, it is used in the logs so you can see which version of the script has
# been used and will help with script debugging
scriptver="1.1"
# The url of the webpage to scrape for the latest version number and download link.
releaseNotesUrl='https://github.com/balena-io/etcher/blob/master/CHANGELOG.md'
# Installation Method, are we using a DMG or PKG to install the app?
installMethod="DMG"
# This is the name of the file we download this might be a dmg or a pkg.
dnldfile='balenaEtcher.dmg'
# The name of the application once it is installed without the .app extension
appName='balenaEtcher'
# The variable to hold the architecture type
architecture=$(/usr/bin/arch)
# Do we want to force quit the existing application before updating
forceQuit='Y'
# The 2 Log files we create as were progressing through the script
# logfile is the main log which has each step and any errors sent to it
# deplog is used to update the depnotify application with statuses and increments the progress bar
logfile="/Library/Caches/com.purplecomputing.mdm/Logs/balenaEtcherInstallScript.log"
deplog="/var/tmp/depnotify.log"
####################################################################################################
# Script Startup #
####################################################################################################
# Making Purple Cache directories for in the event that the helper script hasn't been run
mkdir -p /Library/Caches/com.purplecomputing.mdm/
mkdir -p /Library/Caches/com.purplecomputing.mdm/Logs/
mkdir -p /Library/Caches/com.purplecomputing.mdm/Apps/
# Create log files if they don't exist
if [[ ! -e ${logfile} ]]; then
/bin/echo "---- New Log ----" >> $logfile
fi
if [[ ! -e ${deplog} ]]; then
/bin/echo "---- New Log ----" >> $deplog
fi
# Open the log files if the openconsole parameter has been passed to the script
if [[ $@ == "openconsole" ]]; then
open ${logfile}
open ${deplog}
fi
# Log the script version and date
/bin/echo "`date`: Running script version: ${scriptver}" >> ${logfile}
####################################################################################################
# Gathering the latest version number #
####################################################################################################
# To get just the latest version number from the Release Notes URL
/bin/echo "`date`: Getting latest version number" >> ${logfile}
/bin/echo "Getting latest version number"
latestver=$(curl -s ${releaseNotesUrl} | grep 'title="v' | cut -f4 -d'"' | sed -e 's/[a-zA-Z]//' )
####################################################################################################
# Gathering the download url #
####################################################################################################
# To get the latest download link from the Release Notes URL
/bin/echo "`date`: Getting download url" >> ${logfile}
/bin/echo "Getting download url"
if [[ $architecture == "arm64" ]]; then
echo "Running Apple Silicon Setting correct URL"
downloadUrl="https://github.com/balena-io/etcher/releases/download/v${latestver}/balenaEtcher-${latestver}.dmg"
else
echo "Running Intel Setting correct URL"
downloadUrl="https://github.com/balena-io/etcher/releases/download/v${latestver}/balenaEtcher-${latestver}.dmg"
fi
# Display the latest version available in the logs
/bin/echo "`date`: Latest version number is: ${latestver}" >> ${logfile}
/bin/echo "Latest version number is: ${latestver}"
####################################################################################################
# Check to see if app already installed and get the version if it is #
####################################################################################################
# Is the app already installed?
if [[ -e "/Applications/${appName}.app" ]]; then
# Read the version number from the info.plist
currentinstalledver=`/usr/bin/defaults read "/Applications/${appName}.app/Contents/Info" CFBundleShortVersionString`
# Display the current installed version number in the logs
/bin/echo "Current installed version is: $currentinstalledver"
/bin/echo "`date`: Current installed version is: $currentinstalledver" >> ${logfile}
# Check to see if the latest available version is the same as the installed version
if [[ ${latestver} = ${currentinstalledver} ]]; then
/bin/echo "${appName} is current. Exiting"
/bin/echo "`date`: ${appName} is current. Exiting" >> ${logfile}
/bin/echo "Status: ${appName} is current. Exiting" >> ${deplog}
exit 0
fi
else
# update the logs to indicate that app is not already installed
currentinstalledver="none"
/bin/echo "${appName} is not installed"
/bin/echo "`date`: ${appName} is not installed" >> ${logfile}
fi
####################################################################################################
# Compare the two versions, if they are different or the App is not present then download and #
# install the new version. #
####################################################################################################
# Check to see if the versions do not match
if [[ "${currentinstalledver}" != "${latestver}" ]]; then
# Display current and available versions in the logs
/bin/echo "`date`: Current ${appName} version: ${currentinstalledver}" >> ${logfile}
/bin/echo "Current ${appName} version: ${currentinstalledver}"
/bin/echo "`date`: Available ${appName} version: ${latestver}" >> ${logfile}
/bin/echo "Available ${appName} version: ${latestver}"
# Download the file
/bin/echo "`date`: Downloading newer version." >> ${logfile}
/bin/echo "Downloading newer version."
url=$(curl -Ls -o /dev/null -w %{url_effective} ${downloadUrl})
/usr/bin/curl -s -o /Library/Caches/com.purplecomputing.mdm/Apps/${dnldfile} ${url}
# Force quit the application
if [[ "${forceQuit}" = "Y" ]]; then
killall ${appName}
fi
####################################################################################################
# Choose the correct installation method. #
####################################################################################################
if [[ "${installMethod}" = "DMG" ]]; then
# Mount the DMG
/bin/echo "`date`: Mounting installer disk image." >> ${logfile}
/usr/bin/hdiutil attach /Library/Caches/com.purplecomputing.mdm/Apps/${dnldfile} -nobrowse
# Copy the file to the Applications folder - you may need to change the mounted volume name
/bin/echo "`date`: Installing..." >> ${logfile}
ditto -rsrc "/Volumes/${appName} ${latestver}/${appName}.app" "/Applications/${appName}.app"
/bin/sleep 10
# Unmount the DMG
/bin/echo "`date`: Unmounting installer disk image." >> ${logfile}
/usr/bin/hdiutil detach $(/bin/df | /usr/bin/grep ${appName} | awk '{print $1}') -quiet
/bin/sleep 10
else
# Open the PKG with installer
cd /tmp
/usr/sbin/installer -pkg ${dnldfile} -target /
fi
# Clean up after the installation
/bin/sleep 5
/bin/echo "`date`: Deleting the downloaded file." >> ${logfile}
/bin/rm /Library/Caches/com.purplecomputing.mdm/Apps/${dnldfile}
####################################################################################################
# Check to see if the update was successful. #
####################################################################################################
# Get the version of the app from the info.plist
newlyinstalledver=`/usr/bin/defaults read "/Applications/${appName}.app/Contents/Info" CFBundleShortVersionString`
# Compare the installed version against the latest version
if [[ "${latestver}" = "${newlyinstalledver}" ]]; then
/bin/echo "`date`: SUCCESS: ${appName} has been updated to version ${newlyinstalledver}" >> ${logfile}
/bin/echo "SUCCESS: ${appName} has been updated to version ${newlyinstalledver}"
# If dockutil is installed remove existing dock icon and add new one
if [[ -e "/usr/local/bin/dockutil" ]]; then
/bin/echo "`date`: Removing Existing Dock Icon." >> ${logfile}
/bin/echo "Removing Existing Dock Icon."
/usr/local/bin/dockutil --remove "${appName}" --allhomes >> ${logfile}
/bin/sleep 5
/bin/echo "`date`: Creating New Dock Icon." >> ${logfile}
/bin/echo "Creating New Dock Icon."
/usr/local/bin/dockutil --add "/Applications/${appName}.app" --position 1 --allhomes >> ${logfile}
/bin/sleep 3
fi
# Update log with Failed install and exit with exit code 1
else
/bin/echo "`date`: ERROR: ${appName} update unsuccessful, version remains at ${currentinstalledver}." >> ${logfile}
/bin/echo "ERROR: ${appName} update unsuccessful, version remains at ${currentinstalledver}."
/bin/echo "---- End of script ----" >> ${logfile}
exit 1
fi
# App is up to date already so we log it.
else
/bin/echo "`date`: ${appName} is already up to date, running ${currentinstalledver}." >> ${logfile}
/bin/echo "${appName} is already up to date, running ${currentinstalledver}."
fi
# Update log so show end of script
/bin/echo "---- End of script ----" >> ${logfile}
# Update DEP Notify to increment the progress bar - when used with multiple scripts
/bin/echo "Command: DeterminateManualStep: 1" >> ${deplog}
#Exit script with exit code 0
exit 0