From 7b6cf246d62acb380659dde07c56f7072fd01795 Mon Sep 17 00:00:00 2001
From: Gregory Haynes <greg@greghaynes.net>
Date: Mon, 16 Feb 2015 17:20:01 -0800
Subject: [PATCH] Support VHD output format

This useful for building images for xen.

Change-Id: Ib716bd7fc1ed979968ea92f46f1644038e40df66
---
 bin/disk-image-create | 27 +++++++++++++++++++++++++--
 lib/img-functions     |  7 +++++++
 2 files changed, 32 insertions(+), 2 deletions(-)

diff --git a/bin/disk-image-create b/bin/disk-image-create
index ecc3f49..c96edec 100755
--- a/bin/disk-image-create
+++ b/bin/disk-image-create
@@ -45,8 +45,9 @@ function show_options () {
     echo "Options:"
     echo "    -a i386|amd64|armhf -- set the architecture of the image(default amd64)"
     echo "    -o imagename -- set the imagename of the output image file(default image)"
-    echo "    -t qcow2,tar,raw -- set the image types of the output image files (default qcow2)"
-    echo "       File types should be comma separated"
+    echo "    -t qcow2,tar,vhd,raw -- set the image types of the output image files (default qcow2)"
+    echo "       File types should be comma separated. VHD outputting requires the vhd-util"
+    echo "       executable be in your PATH."
     echo "    -x -- turn on tracing"
     echo "    -u -- uncompressed; do not compress the image - larger but faster"
     echo "    -c -- clear environment before starting work"
@@ -80,6 +81,10 @@ function show_options () {
     echo
     echo "NOTE: At least one distribution root element must be specified."
     echo
+    echo "NOTE: If using the VHD output format you need to have a patched version of vhd-util installed for the image"
+    echo "      to be bootable. The patch is available here: https://github.com/emonty/vhd-util/blob/master/debian/patches/citrix"
+    echo "      and a PPA with the patched tool is available here: https://launchpad.net/~openstack-ci-core/+archive/ubuntu/vhd-util"
+    echo
     echo "Examples:"
     if [ "$IS_RAMDISK" == "0" ]; then
         echo "    ${SCRIPTNAME} -a amd64 -o ubuntu-amd64 vm ubuntu"
@@ -159,6 +164,24 @@ if [ "${#IMAGE_TYPES[@]}" = "1" ]; then
   export IMAGE_NAME=${IMAGE_NAME%%\.${IMAGE_TYPES[0]}}
 fi

+# Check for required tools early on
+for X in ${!IMAGE_TYPES[@]}; do
+    case "${IMAGE_TYPES[$X]}" in
+        qcow2)
+            if [ -z "$(which qemu-img)" ]; then
+                echo "qcow2 output format specified but qemu-img executable not found."
+                exit 1
+            fi
+            ;;
+        vhd)
+            if [ -z "$(which vhd-util)" ]; then
+                echo "vhd output format specified but no vhd-util executable found."
+                exit 1
+            fi
+            ;;
+    esac
+done
+
 # NOTE: Tuning the rootfs uuid works only for ext filesystems.
 # Rely on the below environment variable only for ext filesystems.
 export DIB_IMAGE_ROOT_FS_UUID=$(uuidgen -r)
diff --git a/lib/img-functions b/lib/img-functions
index 852f575..0f3b82c 100644
--- a/lib/img-functions
+++ b/lib/img-functions
@@ -120,6 +120,13 @@ function compress_and_save_image () {
     fi
     if [ "$IMAGE_TYPE" = "raw" ]; then
         mv $TMP_IMAGE_PATH $1-new
+    elif [ "$IMAGE_TYPE" == "vhd" ]; then
+        cp $TMP_IMAGE_PATH $1-intermediate
+        vhd-util convert -s 0 -t 1 -i $1-intermediate -o $1-intermediate
+        vhd-util convert -s 1 -t 2 -i $1-intermediate -o $1-new
+        # The previous command creates a .bak file
+        rm $1-intermediate.bak
+        OUT_IMAGE_PATH=$1-new
     else
         echo "Converting image using qemu-img convert"
         qemu-img convert ${COMPRESS_IMAGE:+-c} -f raw $TMP_IMAGE_PATH -O $IMAGE_TYPE $EXTRA_OPTIONS $1-new