DMG Creation Script

makedmg.sh

#!/bin/bash

# DMG Creation Script
# Usage: makedmg <imagename> <imagetitle> <imagesize (MB)> <contentdir>
#
# imagename: The output file name of the image, ie foo.dmg
# imagetitle: The title of the DMG File as displayed in OS X
# imagesize: The size of the DMG you're creating in MB (Blame Linux for the fixed size limitation!!)
# contentdir: The directory containing the content you want the DMG file to contain
#
# Example: makedmg foo.dmg "Script Test" 50 /home/jon/work/scripts/content
#
# Author: Jon Cowie
# Creation Date: 02/04/2008

if [ ! $# == 4 ]; then
	echo "Usage: makedmg <imagename> <imagetitle> <imagesize (MB)> <contentdir>"
else
	OUTPUT=$1
	TITLE=$2
	FILESIZE=$3
	CONTENTDIR=$4
	USER=`whoami`
	TMPDIR="/tmp/dmgdir"

	if [ ${USER} != "root" ]; then
		echo "makedmg must be run as root!"
	else
		echo "Creating DMG File..."
		dd if=/dev/zero of=${OUTPUT} bs=1M count=$FILESIZE
		mkfs.hfsplus -v "${TITLE}" ${OUTPUT}

		echo "Mounting DMG File..."
		mkdir -p ${TMPDIR}
		mount -t hfsplus -o loop ${OUTPUT} ${TMPDIR}

		echo "Copying content to DMG File..."
		cp -R ${CONTENTDIR}/* ${TMPDIR}

		echo "Unmounting DMG File..."
		umount ${TMPDIR}
		rm -rf ${TMPDIR}

		echo "All Done!"
	fi
fi