Wharfie

#!/bin/bash

OUT=${1}
d=$(basename $(mktemp -d));

# create blank image
qemu-img create -f raw ${OUT}.raw 2G &&

# create partition table
(
    echo o # Create a new empty DOS partition table
    echo n # Add a new partition
    echo p # Primary partition
    echo 1 # Partition number
    echo   # First sector (Accept default: 1)
    echo   # Last sector (Accept default: varies)
    echo w # Write changes
) | sudo /sbin/fdisk ${OUT}.raw &&
l=$(/sbin/kpartx -l ${OUT}.raw | sed -n '/loop/ s,.*/dev/\(loop[0-9]\+\).*,\1, p;q;') &&

/sbin/kpartx -as ${OUT}.raw &&

# Create filesystem
echo mount /dev/mapper/${l}p1 /tmp/${d}
uuid=$(/sbin/mkfs.ext3 /dev/mapper/${l}p1 | sed -n '/^Filesystem UUID/ s,.*: \(.*\),\1, p') &&
mount /dev/mapper/${l}p1 /tmp/${d} &&

# Copy files
((tar -cf - .) | (cd /tmp/${d}; tar -xf -)) &&

# Generate fstab with root partition
mkdir /tmp/${d}/build &&
(
    echo "UUID=${uuid} /               ext3    errors=remount-ro 0       0";
) > /tmp/${d}/etc/fstab

umount /tmp/${d} &&
/sbin/kpartx -ds ${OUT}.raw &&
qemu-img convert -O qcow2 ${OUT}.raw ${OUT}
echo ${uuid} > ${OUT}.uuid

rm -f ${OUT}.raw
rmdir /tmp/${d}