#!/bin/bash
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at
http://mozilla.org/MPL/2.0/.
# Unpack a disk image to a specified target folder
#
# Usage: unpack-diskimage <image_file>
# <mountpoint>
# <target_path>
DMG_PATH=$1
MOUNTPOINT=$2
TARGETPATH=$3
# How long to wait before giving up waiting for the mount to finish (seconds)
TIMEOUT=90
# If mnt already exists, then the previous run may not have cleaned up
# properly. We should try to umount and remove the mnt directory.
if [ -d $MOUNTPOINT ]; then
echo "mnt 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"
# 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
# mnt directory. Due to the async nature of diskimages-helper, the best thing
# we can do is to make sure the glob() rsync is making can find files.
i=0
while [ "$(echo $MOUNTPOINT/*)" == "$MOUNTPOINT/*" ]; do
if [ $i -gt $TIMEOUT ]; then
echo "No files found, exiting"
exit 1
fi
sleep 1
i=$(expr $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/.
hdiutil detach $MOUNTPOINT
rm -rdf $MOUNTPOINT
# diskimage-helper prints messages to stdout asynchronously as well, sleep
# for a bit to ensure they don't disturb following commands in a script that
# might parse stdout messages
sleep 5
