Added script to build qemu recovery images to macrecovery

Utilities/macrecovery/README.md

@@ -3,3 +3,6 @@
 macrecovery is a tool that helps to automate recovery interaction. It can be used to download diagnostics and recovery as well as analyse MLB.
 
 Requires python to run. Run with `-h` argument to see all available arguments.
+
+To create a disk image for a virtual machine installation use `build-image.sh`.
+

Utilities/macrecovery/build-image.sh

+#!/bin/bash -e
+
+rm -rf Recovery.RO.dmg Recovery.RO.raw Recovery.dmg.sparseimage
+hdiutil create -size 800m -layout "UNIVERSAL HD" -type SPARSE -o Recovery.dmg
+newDevice=$(hdiutil attach -nomount Recovery.dmg.sparseimage | head -n 1 | awk  '{print $1}')
+echo newdevice "$newDevice"
+diskutil partitionDisk "${newDevice}" 1 MBR fat32 RECOVERY R
+N=$(echo "$newDevice" | tr -dc '0-9')
+diskutil mount disk"${N}"s1
+MOUNT="$(diskutil info  disk"${N}"s1 | sed -n 's/.*Mount Point: *//p')"
+mkdir -p "$MOUNT/com.apple.recovery.boot"
+cp ./*.dmg ./*.chunklist "$MOUNT/com.apple.recovery.boot/"
+diskutil umount disk"${N}"s1
+hdiutil detach "$newDevice"
+hdiutil convert -format UDZO Recovery.dmg.sparseimage -o Recovery.RO.dmg
+rm Recovery.dmg.sparseimage
+qemu-img convert -f dmg -O raw Recovery.RO.dmg Recovery.raw
+rm Recovery.RO.dmg