#! /bin/bash

# Create a read-only disk image of the contents of a folder

set -e;

function pure_version() {

  echo '1.0.0.2'

}

function version() {

  echo "create-dmg $(pure_version)"

}

function usage() {

  version

  echo "Creates a fancy DMG file."

  echo "Usage:  $(basename $0) options... image.dmg source_folder"

  echo "All contents of source_folder will be copied into the disk image."

  echo "Options:"

  echo "  --volname name"

  echo "      set volume name (displayed in the Finder sidebar and window title)"

  echo "  --volicon icon.icns"

  echo "      set volume icon"

  echo "  --background pic.png"

  echo "      set folder background image (provide png, gif, jpg)"

  echo "  --window-pos x y"

  echo "      set position the folder window"

  echo "  --window-size width height"

  echo "      set size of the folder window"

  echo "  --icon-size icon_size"

  echo "      set window icons size (up to 128)"

  echo "  --icon file_name x y"

  echo "      set position of the file's icon"

  echo "  --hide-extension file_name"

  echo "      hide the extension of file"

  echo "  --custom-icon file_name custom_icon_or_sample_file x y"

  echo "      set position and custom icon"

  echo "  --app-drop-link x y"

  echo "      make a drop link to Applications, at location x,y"

  echo "  --eula eula_file"

  echo "      attach a license file to the dmg"

  echo "  --version         show tool version number"

  echo "  -h, --help        display this help"

  exit 0

}

WINX=10

WINY=60

WINW=500

WINH=350

ICON_SIZE=128

while test "${1:0:1}" = "-"; do

  case $1 in

    --volname)

      VOLUME_NAME="$2"

      shift; shift;;

    --volicon)

      VOLUME_ICON_FILE="$2"

      shift; shift;;

    --background)

      BACKGROUND_FILE="$2"

      BACKGROUND_FILE_NAME="$(basename $BACKGROUND_FILE)"

      BACKGROUND_CLAUSE="set background picture of opts to file \".background:$BACKGROUND_FILE_NAME\""

      shift; shift;;

    --icon-size)

      ICON_SIZE="$2"

      shift; shift;;

    --window-pos)

      WINX=$2; WINY=$3

      shift; shift; shift;;

    --window-size)

      WINW=$2; WINH=$3

      shift; shift; shift;;

    --icon)

      POSITION_CLAUSE="${POSITION_CLAUSE}set position of item \"$2\" to {$3, $4}

"

      shift; shift; shift; shift;;

    --hide-extension)

      HIDING_CLAUSE="${HIDING_CLAUSE}set the extension hidden of item \"$2\" to true"

      shift; shift;;

    --custom-icon)

      shift; shift; shift; shift; shift;;

    -h | --help)

      usage;;

    --version)

      version; exit 0;;

    --pure-version)

      pure_version; exit 0;;

    --app-drop-link)

      APPLICATION_LINK=$2

      APPLICATION_CLAUSE="set position of item \"Applications\" to {$2, $3}

"

      shift; shift; shift;;

    --eula)

      EULA_RSRC=$2

      shift; shift;;

    -*)

      echo "Unknown option $1. Run with --help for help."

      exit 1;;

  esac

done

test -z "$2" && {

  echo "Not enough arguments. Invoke with --help for help."

  exit 1

}

DMG_PATH="$1"

DMG_DIRNAME="$(dirname "$DMG_PATH")"

DMG_DIR="$(cd $DMG_DIRNAME > /dev/null; pwd)"

DMG_NAME="$(basename "$DMG_PATH")"

DMG_TEMP_NAME="$DMG_DIR/rw.${DMG_NAME}"

SRC_FOLDER="$(cd "$2" > /dev/null; pwd)"

test -z "$VOLUME_NAME" && VOLUME_NAME="$(basename "$DMG_PATH" .dmg)"

AUX_PATH="$(dirname $0)/support"

test -d "$AUX_PATH" || {

  echo "Cannot find support directory: $AUX_PATH"

  exit 1

}

if [ -f "$SRC_FOLDER/.DS_Store" ]; then

    echo "Deleting any .DS_Store in source folder"

    rm "$SRC_FOLDER/.DS_Store"

fi

# Create the image

echo "Creating disk image..."

test -f "${DMG_TEMP_NAME}" && rm -f "${DMG_TEMP_NAME}"

ACTUAL_SIZE=`du -sm "$SRC_FOLDER" | sed -e 's/	.*//g'`

DISK_IMAGE_SIZE=$(expr $ACTUAL_SIZE + 20)

hdiutil create -srcfolder "$SRC_FOLDER" -volname "${VOLUME_NAME}" -fs HFS+ -fsargs "-c c=64,a=16,e=16" -format UDRW -size ${DISK_IMAGE_SIZE}m "${DMG_TEMP_NAME}"

# mount it

echo "Mounting disk image..."

MOUNT_DIR="/Volumes/${VOLUME_NAME}"

# try unmount dmg if it was mounted previously (e.g. developer mounted dmg, installed app and forgot to unmount it)

echo "Unmounting disk image..."

DEV_NAME=$(hdiutil info | egrep '^/dev/' | sed 1q | awk '{print $1}')

test -d "${MOUNT_DIR}" && hdiutil detach "${DEV_NAME}"

echo "Mount directory: $MOUNT_DIR"

DEV_NAME=$(hdiutil attach -readwrite -noverify -noautoopen "${DMG_TEMP_NAME}" | egrep '^/dev/' | sed 1q | awk '{print $1}')

echo "Device name:     $DEV_NAME"

if ! test -z "$BACKGROUND_FILE"; then

  echo "Copying background file..."

  test -d "$MOUNT_DIR/.background" || mkdir "$MOUNT_DIR/.background"

  cp "$BACKGROUND_FILE" "$MOUNT_DIR/.background/$BACKGROUND_FILE_NAME"

fi

if ! test -z "$APPLICATION_LINK"; then

  echo "making link to Applications dir"

  echo $MOUNT_DIR

  ln -s /Applications "$MOUNT_DIR/Applications"

fi

if ! test -z "$VOLUME_ICON_FILE"; then

  echo "Copying volume icon file '$VOLUME_ICON_FILE'..."

  cp "$VOLUME_ICON_FILE" "$MOUNT_DIR/.VolumeIcon.icns"

  SetFile -c icnC "$MOUNT_DIR/.VolumeIcon.icns"

fi

# run applescript

APPLESCRIPT=$(mktemp -t createdmg)

cat "$AUX_PATH/template.applescript" | sed -e "s/WINX/$WINX/g" -e "s/WINY/$WINY/g" -e "s/WINW/$WINW/g" -e "s/WINH/$WINH/g" -e "s/BACKGROUND_CLAUSE/$BACKGROUND_CLAUSE/g" -e "s/ICON_SIZE/$ICON_SIZE/g" | perl -pe  "s/POSITION_CLAUSE/$POSITION_CLAUSE/g" | perl -pe "s/APPLICATION_CLAUSE/$APPLICATION_CLAUSE/g" | perl -pe "s/HIDING_CLAUSE/$HIDING_CLAUSE/" >"$APPLESCRIPT"

echo "Running Applescript: /usr/bin/osascript \"${APPLESCRIPT}\" \"${VOLUME_NAME}\""

"/usr/bin/osascript" "${APPLESCRIPT}" "${VOLUME_NAME}" || true

echo "Done running the applescript..."

sleep 4

rm "$APPLESCRIPT"

# make sure it's not world writeable

echo "Fixing permissions..."

chmod -Rf go-w "${MOUNT_DIR}" &> /dev/null || true

echo "Done fixing permissions."

# make the top window open itself on mount:

echo "Blessing started"

bless --folder "${MOUNT_DIR}" --openfolder "${MOUNT_DIR}"

echo "Blessing finished"

if ! test -z "$VOLUME_ICON_FILE"; then

   # tell the volume that it has a special file attribute

   SetFile -a C "$MOUNT_DIR"

fi

# unmount

echo "Unmounting disk image..."

hdiutil detach "${DEV_NAME}"

# compress image

echo "Compressing disk image..."

hdiutil convert "${DMG_TEMP_NAME}" -format UDZO -imagekey zlib-level=9 -o "${DMG_DIR}/${DMG_NAME}"

rm -f "${DMG_TEMP_NAME}"

# adding EULA resources

if [ ! -z "${EULA_RSRC}" -a "${EULA_RSRC}" != "-null-" ]; then

        echo "adding EULA resources"

        "${AUX_PATH}/dmg-license.py" "${DMG_DIR}/${DMG_NAME}" "${EULA_RSRC}"

fi

echo "Disk image done"

exit 0