#!/bin/bash

set -e
source $_LIB/die
[ -n "$IMAGE_BLOCK_DEVICE" ] || die "Image block device not set"

# Create 1 partition far enough up the disk to permit grub to be installed on
# the MBR.
sudo sfdisk $IMAGE_BLOCK_DEVICE << EOF
1 - - *
0 0;
0 0;
0 0;
EOF

sudo partprobe $IMAGE_BLOCK_DEVICE

echo "IMAGE_BLOCK_DEVICE=${IMAGE_BLOCK_DEVICE}p1"