The x86 directory (and others, once we support different architectures) [...]"

czanik@ubuntu910:~/chromiumos/chromiumos.git/src/scripts$ more mk_arm_sd_image.py
#!/usr/bin/env python

# Copyright (c) 2009 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

"""Script to generate ARM beagleboard SD card image from kernel, root fs

This script must be passed a uImage file and a tarred up root filesystem.
It also needs EITHER an output device or a file + size. If you use a real
device, the entire device will be used. if you specify a file, the file
will be truncated to the given length and be formatted as a disk image.

To copy a disk image to a device (e.g. /dev/sdb):
# dd if=disk_image.img of=/dev/sdb bs=4M
"""

from optparse import OptionParser
import math
import os