Create distribution DMG with application, link to /Applications folder and backdrop image in MacOS X.

MakeReleaseDMG.sh

#!/bin/bash
# This script needs to have specific folders set. See the code below.

if [[ -z "$2" ]]; then
		echo >&2 "MakeReleaseDMG creates a release disk image ready to be uploaded to the server."
		echo >&2 "Remember to turn on Support for Assistive Devices in Universal Control"
    echo >&2 "MakeReleaseDMG <Xcode archive path> <output dmg path>"
    exit 1
fi

XCODE_ARCHIVE="$1"
DMG_OUTPUT="$2"

APPLICATION_NAME="SingleIssueCreator"

BASEDIR=$(dirname $0)
DIR=`pwd`'/'$BASEDIR

# Background image
BACKGROUND_IMGNAME="DmgBackground.png"
BACKGROUND_IMG=$DIR"/"$BACKGROUND_IMGNAME

# Create an empty disk image
BASE_FOLDER=$DIR"/Base"
TMP_DMG="/tmp/"$RANDOM".dmg"
VOL_NAME="SingleIssueCreator"
hdiutil create -srcfolder $BASE_FOLDER -volname $VOL_NAME -fs HFS+ -fsargs "-c c=64,a=16,e=16" -format UDRW -size 40000k $TMP_DMG

# Mount the newly created image
MOUNTED_PATH=$(hdiutil attach -readwrite -noverify -noautoopen $TMP_DMG | egrep '^/dev/' | awk '{print $3}')

# Copy image
mkdir $MOUNTED_PATH/.background
cp $BACKGROUND_IMG $MOUNTED_PATH/.background/$BACKGROUND_IMGNAME

# Copy the application
IN_APPLICATION=$XCODE_ARCHIVE"/Products/Applications/"$APPLICATION_NAME".app"
cp -r "$IN_APPLICATION" $MOUNTED_PATH

# Make Application alias
ln -s /Applications $MOUNTED_PATH/Applications

# Rearrange by using AppleScript
cat $DIR/Rearrange.scpt | sed -e "s/REPLACE_DISK_NAME/$VOL_NAME/" -e "s/REPLACE_APPLICATION_NAME/$APPLICATION_NAME/" | osascript

# Finalize DMG
chmod -Rf go-w $MOUNTED_PATH
sync
sync
hdiutil detach $MOUNTED_PATH
hdiutil convert $TMP_DMG -format UDZO -imagekey zlib-level=9 -o "$DMG_OUTPUT"
rm -rf $TMP_DMG

# Sign update using Sparkle
echo "Signed update using dsa private key:"
$DIR/../Frameworks/Sparkle-1.8.0/bin/sign_update.sh "$DMG_OUTPUT" $DIR/../Frameworks/Sparkle-1.8.0/bin/dsa_priv.pem