#!/bin/zsh

set -e

if [[ ! -x ../e2fsimage-0.2.0/src/e2fsimage ]]; then
    echo "Please make e2fsimage"
    exit 1
fi

if [[ ! -f source/rand ]]; then
    echo "source/rand expected.  Grab a large file (< 128MB) or run"
    echo "  dd if=/dev/urandom of=rand bs=1048576 count=120"
    exit 1
fi

echo "Creating blank image"
qemu-img create test.img 128M
echo "Partitioning image"
echo ",,L" | /sbin/sfdisk -H 16 -S 63 -L test.img
info=(`/sbin/fdisk -l -u test.img | grep '^test' | sed '1!d'`)
start=$info[2]
blocks=${info[4]/+/}
echo "Creating ext2 FS ($blocks blocks)"
../e2fsimage-0.2.0/src/e2fsimage -f foo.img -d source -s $blocks
echo "Pasting file system into test.img image (at $start blocks)"
dd if=foo.img of=test.img conv=notrunc bs=512 seek=$start
echo "Cleaning up"
rm foo.img