Install Microsoft Teams pkg (and maybe others) on macOS without admin

non-admin-install.sh

#!/bin/bash

# setup
pkgpath=$1
pkgout=/tmp/$(/usr/bin/openssl rand -hex 10)
payout=/tmp/$(/usr/bin/openssl rand -hex 10)
if [ -d "$pkgout" ]; then
    echo $pkgout already exists
    exit 1
fi
if [ ! -d "$payout" ]; then
    mkdir "$payout"
fi

# uncompress pkg
echo Expanding $pkgpath...
pkgutil --expand $pkgpath $pkgout > /dev/null

# get the pkg name
expandpkg=`find "$pkgout" -name *.pkg | tail -n 1 | xargs basename`

# if there's a payload directory then that's probably the .app so move it out
if [ -d "$pkgout/$expandpkg/payload" ]; then
    echo Copying $expandpkg.app...
    mv "$pkgout/$expandpkg/payload" "$payout/$expandpkg.app"
fi

# if there's a payload file, then it's probably a tar'd version of the .app folder so extract it
if [[ -f "$pkgout/$expandpkg/Payload" ]]; then
    echo Extracting payload to $payout...
    tar xf "$pkgout/$expandpkg/Payload" -C "$payout" > /dev/null
fi

# if we did this before, clean up dmg
if [[ -f "/tmp/${expandpkg}.dmg" ]]; then
    rm -f /tmp/${expandpkg}.dmg
fi

# create dmg, mount it, create link to ~/Applications and detach
echo Creating DMG...
hdiutil create -srcfolder "$payout" -volname "$expandpkg" -fs HFS+ -fsargs "-c c=64,a=16,e=16" -format UDRW "/tmp/${expandpkg}.dmg" > /dev/null
MOUNT_DIR="/Volumes/${expandpkg}"
DEV_NAME=$(hdiutil attach -readwrite -noverify -noautoopen "/tmp/${expandpkg}.dmg" | egrep --color=never '^/dev/' | sed 1q | awk '{print $1}')
ln -s ~/Applications "$MOUNT_DIR/Applications"
hdiutil detach "${DEV_NAME}" > /dev/null

# pop open dmg
echo Opening DMG...
hdiutil attach -readonly -noverify -autoopen "/tmp/${expandpkg}.dmg" >/dev/null