unpack-diskimage.sh

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#!/bin/bash

# ***** BEGIN LICENSE BLOCK *****

# Version: MPL 1.1/GPL 2.0/LGPL 2.1

# The contents of this file are subject to the Mozilla Public License Version

# 1.1 (the "License"); you may not use this file except in compliance with

# the License. You may obtain a copy of the License at

# http://www.mozilla.org/MPL/

# Software distributed under the License is distributed on an "AS IS" basis,

# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License

# for the specific language governing rights and limitations under the

# License.

# The Original Code is the installdmg.sh script from taols utilities

# The Initial Developer of the Original Code is

# Mozilla Corporation.

# Portions created by the Initial Developer are Copyright (C) 2009

# the Initial Developer. All Rights Reserved.

# Contributor(s):

#  Chris AtLee <catlee@mozilla.com>

#  Robert Kaiser <kairo@kairo.at>

# Alternatively, the contents of this file may be used under the terms of

# either the GNU General Public License Version 2 or later (the "GPL"), or

# the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),

# in which case the provisions of the GPL or the LGPL are applicable instead

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# decision by deleting the provisions above and replace them with the notice

# and other provisions required by the GPL or the LGPL. If you do not delete

# the provisions above, a recipient may use your version of this file under

# the terms of any one of the MPL, the GPL or the LGPL.

# ***** END LICENSE BLOCK *****

# Unpack a disk image to a specified target folder

# Usage: unpack-diskimage <image_file>

#                         <mountpoint>

#                         <target_path>

DMG_PATH=$1

MOUNTPOINT=$2

TARGETPATH=$3

LOGFILE=unpack.output

# How long to wait before giving up waiting for the mount to fininsh

TIMEOUT=90

# If the mount point already exists, then the previous run may not have cleaned

# up properly.  We should try to umount and remove the its directory.

if [ -d "$MOUNTPOINT" ]; then

    echo "$MOUNTPOINT already exists, trying to clean up"

    hdiutil detach "$MOUNTPOINT" -force

    rm -rdfv "$MOUNTPOINT"

fi

# Install an on-exit handler that will unmount and remove the '$MOUNTPOINT' directory

trap '{ if [ -d $MOUNTPOINT ]; then hdiutil detach $MOUNTPOINT -force; rm -rdfv $MOUNTPOINT; fi; }' EXIT

mkdir -p "$MOUNTPOINT"

hdiutil attach -verbose -noautoopen -mountpoint "$MOUNTPOINT" "$DMG_PATH" &> $LOGFILE

# Wait for files to show up

# hdiutil uses a helper process, diskimages-helper, which isn't always done its

# work by the time hdiutil exits.  So we wait until something shows up in the

# mount point directory.

i=0

while [ "$(echo "$MOUNTPOINT"/*)" == "$MOUNTPOINT/*" ]; do

    if [ "$i" -gt $TIMEOUT ]; then

        echo "No files found, exiting"

        exit 1

fi

    sleep 1

    i=$((i+1))

done

# Now we can copy everything out of the $MOUNTPOINT directory into the target directory

rsync -av "$MOUNTPOINT"/* "$MOUNTPOINT"/.DS_Store "$MOUNTPOINT"/.background "$MOUNTPOINT"/.VolumeIcon.icns "$TARGETPATH"/ > $LOGFILE

# sometimes hdiutil fails with "Resource busy"

hdiutil detach "$MOUNTPOINT" || { sleep  10; \

    if [ -d "$MOUNTPOINT" ]; then hdiutil detach "$MOUNTPOINT" -force; fi; }

i=0

while [ "$(echo "$MOUNTPOINT"/*)" != "$MOUNTPOINT/*" ]; do

    if [ "$i" -gt $TIMEOUT ]; then

        echo "Cannot umount, exiting"

        exit 1

fi

    sleep 1

    i=$((i+1))

done

rm -rdf "$MOUNTPOINT"