#!/bin/sh

# usage mkdmgfromapp appname [extrafile] [extrafile]

# 
if [ ! -d "$1" ] || [ `basename "$1" .app` == `basename "$1"` ]
then
	echo "Cannot find $1 or not an .app. Bailing out..."
	exit 1
fi

NAME=`basename "$1" .app`
VERSION=`plist -Key CFBundleVersion -Path "$1"/Contents/Info.plist`
DMG=${NAME}-"${VERSION}".dmg

VOLNAME="${NAME}-${VERSION}-Volume"
rm -f "${DMG}" "${DMG}".gz
hdiutil create -megabytes 4 "${DMG}" -layout NONE
AppDisk=`hdid -nomount "${DMG}"|sed 's/ .*//'`
echo "Disk: ${AppDisk}"
newfs_hfs -v "${VOLNAME}" "${AppDisk}"
hdiutil eject "${AppDisk}"
echo Step
HDID=`hdid "${DMG}"`
# Warning: hidden behaviour
# Both patterns below contain a space and a tab. Do not edit with an editor
# that translates tab to space or space to tab
AppDisk=`echo -n "${HDID}"|sed 's/[ 	].*//'`
AppVolume=`echo -n "${HDID}"|sed 's/^[^ 	]*[ 	]*//'`

echo "Disk: ${AppDisk} Vol: ${AppVolume}"

if [ ! -d "${AppVolume}" ]
then
	echo "Cannot locate ${AppVolume} volume. Baling out..."
	exit 1
else
	while [ $# -gt 0 ]
	do
		cp -pr "$1" "${AppVolume}"
		shift
	done
fi

hdiutil eject "${AppDisk}"
gzip -9 "${DMG}"

exit 0