devserver support for update images from buildbot.

src/platform/dev/autoupdate.py

 # 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.
 
 from buildutil import BuildObject
 from xml.dom import minidom
 
 import os
 import shutil
 import sys
@@ skipping 80 matching lines @@
     return False
 
   def UnpackImage(self, image_path, kernel_file, rootfs_file):
     if os.path.exists(rootfs_file) and os.path.exists(kernel_file):
       return True
     if self.test_image:
       image_file = 'chromiumos_test_image.bin'
     else:
       image_file = 'chromiumos_image.bin'
     if self.serve_only:
-      os.system('cd %s && unzip -o image.zip' %
+      err = os.system('cd %s && unzip -o image.zip %s unpack_partitions.sh' %
                 (image_path, image_file))
+      if err:
+        web.debug('unzip image.zip failed.')
+        return False
+
     os.system('rm -f %s/part_*' % image_path)
     os.system('cd %s && ./unpack_partitions.sh %s' % (image_path, image_file))
     shutil.move(os.path.join(image_path, 'part_2'), kernel_file)
     shutil.move(os.path.join(image_path, 'part_3'), rootfs_file)
     os.system('rm -f %s/part_*' % image_path)
     return True
 
   def BuildUpdateImage(self, image_path):
     kernel_file = '%s/kernel.image' % image_path
     rootfs_file = '%s/rootfs.image' % image_path
@@ skipping 156 matching lines @@
       ok = self.BuildUpdateImage(latest_image_path)
       if ok != True:
         web.debug('Failed to build an update image')
         return self.GetNoUpdatePayload()
 
       hash = self.GetHash('%s/update.gz' % self.static_dir)
       size = self.GetSize('%s/update.gz' % self.static_dir)
 
       url = 'http://%s/static/update.gz' % hostname
       return self.GetUpdatePayload(hash, size, url)