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#!/usr/bin/python2.6
#
# Copyright 2011 Google Inc. All Rights Reserved.
"""Script to image a ChromeOS device.
This script images a remote ChromeOS device with a specific image."
"""
__author__ = "asharif@google.com (Ahmad Sharif)"
import filecmp
import glob
import optparse
import os
import shutil
import sys
import tempfile
from utils import command_executer
from utils import logger
from utils.file_utils import FileUtils
checksum_file = "/usr/local/osimage_checksum_file"
def Usage(parser, message):
print "ERROR: " + message
parser.print_help()
sys.exit(0)
def Main(argv):
"""Build ChromeOS."""
# Common initializations
cmd_executer = command_executer.GetCommandExecuter()
l = logger.GetLogger()
parser = optparse.OptionParser()
parser.add_option("-c", "--chromeos_root", dest="chromeos_root",
help="Target directory for ChromeOS installation.")
parser.add_option("-r", "--remote", dest="remote",
help="Target device.")
parser.add_option("-i", "--image", dest="image",
help="Image binary file.")
parser.add_option("-b", "--board", dest="board",
help="Target board override.")
parser.add_option("-f", "--force", dest="force",
action="store_true",
default=False,
help="Force an image even if it is non-test.")
parser.add_option("-a",
"--image_to_live_args",
dest="image_to_live_args")
options = parser.parse_args(argv[1:])[0]
if options.chromeos_root is None:
Usage(parser, "--chromeos_root must be set")
if options.remote is None:
Usage(parser, "--remote must be set")
options.chromeos_root = os.path.expanduser(options.chromeos_root)
if options.board is None:
board = cmd_executer.CrosLearnBoard(options.chromeos_root, options.remote)
else:
board = options.board
if options.image is None:
image = (options.chromeos_root +
"/src/build/images/" + board +
"/latest/" +
"/chromiumos_image.bin")
else:
image = options.image
image = os.path.expanduser(image)
image = os.path.realpath(image)
if not os.path.exists(image):
Usage(parser, "Image file: " + image + " does not exist!")
image_checksum = FileUtils().Md5File(image)
command = "cat " + checksum_file
retval, device_checksum, err = cmd_executer.CrosRunCommand(command,
return_output=True,
chromeos_root=options.chromeos_root,
machine=options.remote)
device_checksum = device_checksum.strip()
image_checksum = str(image_checksum)
l.LogOutput("Image checksum: " + image_checksum)
l.LogOutput("Device checksum: " + device_checksum)
if image_checksum != device_checksum:
[found, located_image] = LocateOrCopyImage(options.chromeos_root,
image,
board=board)
l.LogOutput("Checksums do not match. Re-imaging...")
is_test_image = IsImageModdedForTest(options.chromeos_root,
located_image)
if not is_test_image and not options.force:
logger.GetLogger().LogFatal("Have to pass --force to image a non-test "
"image!")
# If the device has /tmp mounted as noexec, image_to_live.sh can fail.
command = "mount -o remount,rw,exec /tmp"
cmd_executer.CrosRunCommand(command,
chromeos_root=options.chromeos_root,
machine=options.remote)
command = (options.chromeos_root +
"/src/scripts/image_to_live.sh --remote=" +
options.remote +
" --image=" + located_image)
if options.image_to_live_args:
command += " %s" % options.image_to_live_args
retval = cmd_executer.RunCommand(command)
if found == False:
temp_dir = os.path.dirname(located_image)
l.LogOutput("Deleting temp image dir: %s" % temp_dir)
shutil.rmtree(temp_dir)
logger.GetLogger().LogFatalIf(retval, "Image command failed")
command = "echo %s > %s && chmod -w %s" % (image_checksum, checksum_file,
checksum_file)
retval = cmd_executer.CrosRunCommand(command,
chromeos_root=options.chromeos_root,
machine=options.remote)
logger.GetLogger().LogFatalIf(retval, "Writing checksum failed.")
successfully_imaged = VerifyChromeChecksum(options.chromeos_root,
image,
options.remote)
logger.GetLogger().LogFatalIf(not successfully_imaged,
"Image verification failed!")
else:
l.LogOutput("Checksums match. Skipping reimage")
return retval
def LocateOrCopyImage(chromeos_root, image, board=None):
l = logger.GetLogger()
if board is None:
board_glob = "*"
else:
board_glob = board
chromeos_root_realpath = os.path.realpath(chromeos_root)
image = os.path.realpath(image)
if image.startswith("%s/" % chromeos_root_realpath):
return [True, image]
# First search within the existing build dirs for any matching files.
images_glob = ("%s/src/build/images/%s/*/*.bin" %
(chromeos_root_realpath,
board_glob))
images_list = glob.glob(images_glob)
for potential_image in images_list:
if filecmp.cmp(potential_image, image):
l.LogOutput("Found matching image %s in chromeos_root." % potential_image)
return [True, potential_image]
# We did not find an image. Copy it in the src dir and return the copied file.
if board is None:
board = ""
base_dir = ("%s/src/build/images/%s" %
(chromeos_root_realpath,
board))
if not os.path.isdir(base_dir):
os.makedirs(base_dir)
temp_dir = tempfile.mkdtemp(prefix="%s/tmp" % base_dir)
new_image = "%s/%s" % (temp_dir, os.path.basename(image))
l.LogOutput("No matching image found. Copying %s to %s" %
(image, new_image))
shutil.copyfile(image, new_image)
return [False, new_image]
def GetImageMountCommand(chromeos_root, image, rootfs_mp, stateful_mp):
image_dir = os.path.dirname(image)
image_file = os.path.basename(image)
mount_command = ("cd %s/src/scripts &&"
"./mount_gpt_image.sh --from=%s --image=%s"
" --safe --read_only"
" --rootfs_mountpt=%s"
" --stateful_mountpt=%s" %
(chromeos_root, image_dir, image_file, rootfs_mp,
stateful_mp))
return mount_command
def MountImage(chromeos_root, image, rootfs_mp, stateful_mp, unmount=False):
cmd_executer = command_executer.GetCommandExecuter()
command = GetImageMountCommand(chromeos_root, image, rootfs_mp, stateful_mp)
if unmount:
command = "%s --unmount" % command
retval = cmd_executer.RunCommand(command)
logger.GetLogger().LogFatalIf(retval, "Mount/unmount command failed!")
return retval
def IsImageModdedForTest(chromeos_root, image):
rootfs_mp = tempfile.mkdtemp()
stateful_mp = tempfile.mkdtemp()
MountImage(chromeos_root, image, rootfs_mp, stateful_mp)
lsb_release_file = os.path.join(rootfs_mp, "etc/lsb-release")
is_test_image = "Test Build" in open(lsb_release_file).read()
MountImage(chromeos_root, image, rootfs_mp, stateful_mp, unmount=True)
return is_test_image
def VerifyChromeChecksum(chromeos_root, image, remote):
cmd_executer = command_executer.GetCommandExecuter()
rootfs_mp = tempfile.mkdtemp()
stateful_mp = tempfile.mkdtemp()
MountImage(chromeos_root, image, rootfs_mp, stateful_mp)
image_chrome_checksum = FileUtils().Md5File("%s/opt/google/chrome/chrome" %
rootfs_mp)
MountImage(chromeos_root, image, rootfs_mp, stateful_mp, unmount=True)
command = "md5sum /opt/google/chrome/chrome"
[r, o, e] = cmd_executer.CrosRunCommand(command,
return_output=True,
chromeos_root=chromeos_root,
machine=remote)
device_chrome_checksum = o.split()[0]
if image_chrome_checksum.strip() == device_chrome_checksum.strip():
return True
else:
return False
if __name__ == "__main__":
retval = Main(sys.argv)
sys.exit(retval)
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