Ejecta: correctly eject APFS-formatted DMGs (raw version)

ejecta

#!/bin/zsh
# shellcheck shell=bash

# ejecta v0.11
# https://gist.github.com/JayBrown/da7da1ef88cdce264fb47495a0fd34c4

export PATH=/usr/bin:/usr/sbin:/bin:/sbin

_beep () {
	osascript -e 'beep' -e 'delay 0.5' &>/dev/null
}

for filepath in "$@"
do
	echo "Input: $filepath"
	apfs=false
	device_all=$(df "$filepath" | grep "^/")
	if [[ $device_all == "//"* ]] ; then
		device1=$(echo "$device_all" | awk '{print substr($0, index($0,$9))}')
		devinfo=$(echo "$device_all" | awk '{print $1}')
		echo "Target: $device1 ($devinfo)"
		if [[ -f "$device_path/.volume_never_unmount" ]] ; then
			echo "Volume blocked!"
			_beep
			continue
		fi
	else
		if [[ $(echo "$device_all" | awk '{print $NF}') == "/" ]] ; then
			echo -e "Target: /\nInternal volume blocked by default!"
			_beep
			continue
		fi
		device_path=$(echo "$device_all" | awk '{print substr($0, index($0,$9))}')
		if [[ $device_path == "/System/Volumes/Data" ]] ; then
			echo -e "Target: /System/Volumes/Data\nInternal volume blocked by default!"
			_beep
			continue
		fi
		echo "Target: $device_path"
		if [[ -f "$device_path/.volume_never_unmount" ]] ; then
			echo "Volume blocked!"
			_beep
			continue
		fi
		device1=$(echo "$device_all" | awk '{print $1}')
		dev1info=$(diskutil list "$device1")
		vol1info=$(echo "$dev1info" | grep "$device1$")
		echo "$vol1info" | grep -q "APFS" &>/dev/null && apfs=true
		device1=$(echo "$dev1info" | head -1 | awk '{print $1}')
		echo "Target device: $device1"
	fi
	if ! $apfs ; then
		echo "Volume is not APFS-formatted: detaching..."
		hdiutil detach "$device1"
	else
		echo "Volume is APFS-formatted"
		dev2info=$(echo "$dev1info" | grep "Physical Store")
		dev2base=$(echo "$dev2info" | awk -F"Physical Store " '{print $2}')
		dev2path="/dev/$dev2base"
		device2=$(diskutil list "$dev2path" | head -1 | awk '{print $1}')
		echo -e "Secondary target device: $device2\nDetaching all..."
		hdiutil detach "$device1" && hdiutil detach "$device2"
	fi
done

exit

v0.10: now with more checks, incl. internal volumes plus a check for a .volume_never_unmount dotfile in the volume's root.

v0.11: additional checks for local SMB-mounted volumes with leading //