Add a script for creating a VirtualBox image.

src/scripts/image_to_virtualbox.sh

Index: src/scripts/image_to_virtualbox.sh
diff --git a/src/scripts/image_to_virtualbox.sh b/src/scripts/image_to_virtualbox.sh
new file mode 100755
index 0000000000000000000000000000000000000000..b49317b1e047db67f98c71b137b036041ba70811
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+++ b/src/scripts/image_to_virtualbox.sh
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+#!/bin/bash
+
+# Copyright (c) 2009 The Chromium OS Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+# Script to convert the output of build_image.sh to a VirtualBox image.
+# Load common constants.  This should be the first executable line.
+# The path to common.sh should be relative to your script's location.
+. "$(dirname "$0")/common.sh"
+
+IMAGES_DIR="${DEFAULT_BUILD_ROOT}/images"
+# Default to the most recent image
+DEFAULT_FROM="${IMAGES_DIR}/`ls -t $IMAGES_DIR | head -1`"
+DEFAULT_TO="${DEFAULT_FROM}/os.vdi"
+TEMP_IMAGE="${IMAGES_DIR}/temp.img"
+
+# Flags
+DEFINE_string from "$DEFAULT_FROM" \
+  "Directory containing rootfs.image and mbr.image"
+DEFINE_string to "$DEFAULT_TO" \
+  "Destination file for VirtualBox image"
+
+# Parse command line
+FLAGS "$@" || exit 1
+eval set -- "${FLAGS_ARGV}"
+
+# Die on any errors.
+set -e
+
+# Convert args to paths.  Need eval to un-quote the string so that shell 
+# chars like ~ are processed; just doing FOO=`readlink -f $FOO` won't work.
+FLAGS_from=`eval readlink -f $FLAGS_from`
+FLAGS_to=`eval readlink -f $FLAGS_to`
+
+# Check if qemu-img and VBoxManage are available.
+for EXTERNAL_tools in qemu-img VBoxManage; do
+  if ! type ${EXTERNAL_tools} >/dev/null 2>&1; then
+    echo "Error: This script requires ${EXTERNAL_tools}."
+    exit 1
+  fi
+done
+
+# Make two sparse files. One for an empty partition, another for
+# stateful partition.
+PART_SIZE=$(stat -c%s "${FLAGS_from}/rootfs.image")
+dd if=/dev/zero of="${FLAGS_from}/empty.image" bs=1 count=1 \
+    seek=$(( $PART_SIZE - 1 ))
+dd if=/dev/zero of="${FLAGS_from}/state.image" bs=1 count=1 \
+    seek=$(( $PART_SIZE - 1 ))
+mkfs.ext3 -F -L C-STATE "${FLAGS_from}/state.image"
+
+# Copy MBR and rootfs to output image
+qemu-img convert -f raw \
+  "${FLAGS_from}/mbr.image" "${FLAGS_from}/state.image" \
+  "${FLAGS_from}/empty.image" "${FLAGS_from}/rootfs.image" \
+  -O raw "${TEMP_IMAGE}"
+VBoxManage convertdd "${TEMP_IMAGE}" "${FLAGS_to}"
+
+rm -f "${FLAGS_from}/empty.image" "${FLAGS_from}/state.image" "${TEMP_IMAGE}"
+
+echo "Done. Created VirtualBox image ${FLAGS_to}"
+