teams apple silicon updater without rosetta

teamsup.sh

#!/bin/bash
# github.com/jpda
# teams updater for apple silicon macs
# today, while universal binaries exist for teams, the teams installer actually contains two packages:
#  - the teams app itself
#  - the MSTeamsAudioDriver - I think it's related to playing music/hi-fi audio in teams, not sure tho
# `MSTeamsAudioDriver.pkg` is still x64, so the main teams installer will ask to install rosetta
# 
# to get around this, we unpack the installer pkg,
# look for the Teams.app package (`Teams_osx_app.pkg`, at least for now), and
# expand the Payload, which is `Microsoft Teams.app`.
# once expanded, it's copied into `/Applications` after killing any running teams processes
# lastly it cleans up the tmp dir it uses as scratch space
#
# usage:
# - no arguments downloads latest public teams installer package from microsoft
# - or pass in the name of an already-acquired teams_osx.pkg
#   e.g.,
#   `teamsup ~/Downloads/Teams_osx.pkg`
#
# not supported, no warranties, use at your own risk, tip your server, etc

WORK=/tmp/teams-up
TEAMS_PKG_PATH=$WORK/Teams_osx.pkg
FILE_TYPE=''

echo "Setting up working directory $WORK"
echo "Default package path $TEAMS_PKG_PATH"
mkdir -p $WORK
cd $WORK

function stopTeams() {
  # stop teams, but exclude this grep command from the PID kill list
  # since we're searching for the pattern, this command will also appear, so the second grep is to ignore grep
  # i feel like there's prob a better way to do this, but a bash wizard I am not
  ps -fe | grep "Microsoft Teams.app/Contents/MacOS/Teams" | grep -wv "grep" | awk '{print $2}' | xargs kill
}

function getTeams(){
  # this is the public download url for teams mac - it will redirect a few times, but this links should always
  # get the latest teams installer that is publicly released
  # using progress-bar here because of the redirects it gets sort of messy
  curl -L "https://go.microsoft.com/fwlink/p/?LinkID=869428" -o $TEAMS_PKG_PATH --progress-bar
}

function updateTeams() {
  echo "Expanding package, looking for Teams_osx_app.pkg"
  pkgutil --expand $TEAMS_PKG_PATH $WORK/teamspkg #>> $WORK/pkgutil.log
  echo "Expanding payload to Microsoft Teams.app"
  tar -xf $WORK/teamspkg/Teams_osx_app.pkg/Payload #>> $WORK/payload.log
  
  # there are lots of different version strings - package versions (through mdls, for example) or pkginfo
  # or even parsing PackageInfo - the Info.plist seems to reflect the teams app version that's represented in-app
  # so this is related not to the package version specifically (or the larger package that includes the MSTeamsAudioDriver
  # but rather the .app itself. At least so far as I can tell :D 
  
  OLD_VER=$(/usr/libexec/PlistBuddy /Applications/Microsoft\ Teams.app/Contents/Info.plist -c "print CFBundleGetInfoString")
  echo "Current installed version: $OLD_VER"
  NEW_VER=$(/usr/libexec/PlistBuddy $WORK/Microsoft\ Teams.app/Contents/Info.plist -c "print CFBundleGetInfoString")
  echo "New version: $NEW_VER"
  if [[ $OLD_VER == $NEW_VER ]] ; then
    echo "Same version, nothing to do"
    return 0 ; 
  fi
  echo "Upgrading $OLDVER --> $NEWVER"
  FILE_TYPE=$(file $WORK/Microsoft\ Teams.app/Contents/MacOS/Teams)
  if [[ $FILE_TYPE == *"arm64"* ]]; then
    echo "This is an arm64 binary, moving to Applications..."
    # moving the old file, copying the new, then deleting the old. it's annoying but 		
    # copying never seemed to quite work correctly
    /bin/mv /Applications/Microsoft\ Teams.app /Applications/TeamsOld.app
    /bin/cp -Rf ./Microsoft\ Teams.app /Applications/
    /bin/rm -rf /Applications/TeamsOld.app
  else
    echo "This is not an arm64 binary, exiting. If you really want this, copy it manually."
  fi
}

function cleanup() {
  echo "Removing schmutz"
  rm -rf $WORK
}

echo "Stopping Teams"
stopTeams

if [ "$1" == '' ] ; then
  echo "Downloading teams package..."
  getTeams
else
  echo "setting path to $1" ;
  TEAMS_PKG_PATH="$1"
fi

echo "Got the file, working on $TEAMS_PKG_PATH from $(pwd)"
updateTeams
cleanup

echo "finished"