VirtualBox Update Script for OS X

I have a strong dislike for applications that are still not able to provide any sort of internal update functionality and require the user to go to a web page to download an update.

I have written an update script for Calibre in the past to automate this update process. Today I made a modified version of this for VirtualBox. I use this application a lot for running various servers for my local development environment.

This script performs four main steps:

1. Checks if a newer version of the application is available
2. If there is, the script will download the DMG of the latest version into a temporary directory
3. After the download is complete, the DMG will be mounted and the installer launched
4. Once the install completes, the DMG is unmounted

I don’t write a lot of scripts, so there may be better ways to achieve this, but it works.

#!/bin/bash # Script to check for updates, and download updates for VirtualBox (http://virtualbox.org/) # Author: David Hutchison # www: http://www.devwithimagination.com/ ################################# ######### CONFIGURATION ######### # These default values should work for everyone. Only change if using a non-standard install location, # or if the download URL changes in the future. ################################# # The download page URL. VIRTUALBOX_INSTALL_LOCATION=/Applications/VirtualBox.app DOWNLOAD_URL=http://download.virtualbox.org/virtualbox VIRTUALBOX_LATEST_VERSION_PAGE=$DOWNLOAD_URL/LATEST.TXT ################################# ##### ADDITIONAL FUNCTIONS ##### # Vercomp function by Dennis Williamson # from StackOverflow answer http://stackoverflow.com/a/4025065/230449 vercomp () { if [[ $1 == $2 ]] then return 0 fi local IFS=. local i ver1=($1) ver2=($2) # fill empty fields in ver1 with zeros for ((i=${#ver1[@]}; i<${#ver2[@]}; i++)) do ver1[i]=0 done for ((i=0; i<${#ver1[@]}; i++)) do if [[ -z ${ver2[i]} ]] then # fill empty fields in ver2 with zeros ver2[i]=0 fi if ((10#${ver1[i]} > 10#${ver2[i]})) then return 1 fi if ((10#${ver1[i]} < 10#${ver2[i]})) then return 2 fi done return 0 } ################################# #Start Update Check script #Extract the latest offered version number. LATEST_VERSION=`curl -s $VIRTUALBOX_LATEST_VERSION_PAGE` #Extract the version number of the currently installed version. CURRENT_VERSION=`defaults read $VIRTUALBOX_INSTALL_LOCATION/Contents/Info CFBundleShortVersionString` vercomp $CURRENT_VERSION $LATEST_VERSION case $? in 0) echo "Installed Version is the latest available ($CURRENT_VERSION).";; 1) echo "Uh Oh! Current Version is newer than the latest available! (Current: \"$CURRENT_VERSION\", Latest: \"$LATEST_VERSION\")";; 2) echo "Update Required. (Current: \"$CURRENT_VERSION\", Latest: \"$LATEST_VERSION\")" FILENAME=`curl -s $DOWNLOAD_URL/$LATEST_VERSION/ | grep OSX | perl -ne '/(VirtualBox.*?\.dmg)/ && print $1'` # Download the latest version curl "$DOWNLOAD_URL/$LATEST_VERSION/$FILENAME" -L -o "$TMPDIR/LatestVirtualBox.dmg" # Mount the drive hdiutil attach -noverify "$TMPDIR/LatestVirtualBox.dmg" MOUNT_POINT=/Volumes/VirtualBox sleep 10 echo "Updating install…" # Open the installer and wait on it to be closed. open -W $MOUNT_POINT/VirtualBox.pkg #Unmount the drive hdiutil detach "$MOUNT_POINT" echo "Update finished." ;; esac