macOS: check if a disk image is APFS-formatted

ckimg

#!/bin/bash

# ckimg v0.5

for filepath in "$@"
do
	shortpath="${filepath/#$HOME/~}"
	filename=$(basename "$filepath")
	echo "Accessing: $shortpath"
	extension="${filename##*.}"
	! [[ $extension =~ ^(dmg|DMG|sparsebundle|SPARSEBUNDLE|sparseimage|SPARSEIMAGE|cdr|CDR|iso|ISO|img|IMG)$ ]] \
		&& { echo "Wrong file type: continuing..." >&2 ; continue ; }
	fsysr=$(hdiutil imageinfo "$filepath" 2>/dev/null)
	fsys=$(echo "$fsysr" \
		| sed -n '/partition-filesystems:/,/[A-Z]/p' \
		| grep -v -e "partition-")
	sysn=$(echo "$fsys" | wc -l | xargs)
	if [[ $sysn -eq 0 ]] ; then
		echo "Filesystem: n/a"
	elif [[ $sysn -eq 1 ]] ; then
		fsys=$(echo "$fsys" \
			| sed -e "s/://g" | xargs)
		echo "Filesystem: $fsys"
	else
		fsysx=$(echo "$fsys" | sort | sed -e "s/://g" \
			| awk 1 ORS=' & ' \
			| sed "s/ & $//" | xargs)
		echo "Filesystems: $fsysx"
	fi
	format=$(echo "$fsysr" | awk -F": " '/^Format: /{print $2}')
	if ! [[ $format ]] ; then
		format="n/a"
		compat="n/a"
	fi
	echo "Format: $format"
	descr=$(echo "$fsysr" | awk -F": " '/^Format Description: /{print $2}')
	echo "Description: $descr"
	cryptinfo=$(hdiutil isencrypted "$filepath" 2>/dev/null)
	if [[ $cryptinfo == "encrypted: NO" ]] ; then
		crypt="none"
	else
		crypt=$(echo "$fsysr" | awk -F": " '/Encryption: /{print $2}')
		! [[ $crypt ]] && crypt="n/a"
	fi
	echo "Encryption: $crypt"
	if [[ $extension =~ ^(dmg|DMG)$ ]] ; then
		fsys=$(echo "$fsys" | grep -v "EFI")
		if [[ $(echo "$fsys" | grep "APFS") ]] ; then
			compat="macOS 10.14+"
		else
			if [[ $format == "ULFO" ]] ; then
				compat="OS X 10.11+"
			elif [[ $format == "UDBZ" ]] ; then
				if [[ $crypt == "AES-256" ]] ; then
					compat="Mac OS X 10.5+"
				else
					compat="Mac OS X 10.4+"
				fi
			else
				if [[ $crypt == "AES-256" ]] ; then
					compat="Mac OS X 10.5+"
				elif [[ $crypt == "AES-128" ]] ; then
					compat="Mac OS X 10.3+"
				else
					compat="Mac OS X 10.2+"
				fi
			fi
		fi
	elif [[ $extension =~ ^(sparsebundle|SPARSEBUNDLE)$ ]] ; then
		compat="Mac OS X 10.5+"
	elif [[ $extension =~ ^(sparseimage|SPARSEIMAGE)$ ]] ; then
		if [[ $crypt == "AES-256" ]] ; then
			compat="Mac OS X 10.5+"
		else
			compat="Mac OS X 10.3+"
		fi
	elif [[ $extension =~ ^(cdr|CDR|iso|ISO)$ ]] ; then
		compat="Mac OS X 10.0+"
	elif [[ $extension =~ ^(img|IMG)$ ]] ; then
		compat="OS 9"
	fi
	echo "Compatibility: $compat"
	echo -n "Verifying " >&2 && while : ; do echo -n ▇ >&2 ; sleep 1 ; done &
		trap "kill $!" EXIT
		hdiverify=$(hdiutil verify "$filepath" 2>&1)
		kill $! && trap " " EXIT
		wait $! 2>/dev/null
	if [[ $(echo "$hdiverify" | grep "has no checksum\.$") ]] ; then
		echo -e "\nVerification: no checksum"
	else
		hdiresult=$(echo "$hdiverify" | grep "^hdiutil: verify: checksum" | rev | awk '{print $1}' | rev)
		if [[ $hdiresult == "INVALID" ]] ; then
			hdihash=$(echo "$hdiverify" | grep "^calculated" | xargs)
		else
			hdihash=$(echo "$hdiverify" | grep "^verified" | awk '{print substr($0, index($0,$2))}')
		fi
		echo -e "\nVerification: $hdiresult ($hdihash)"
	fi
	echo "********"
done
echo "Done."