Fix devserver to unpack rootfs and serve it.

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 web
@@ skipping 55 matching lines @@
     client_tokens = client_version.split('.')
     latest_tokens = latest_version.split('.')
     web.debug('client version %s latest version %s' \
         % (client_version, latest_version))
     for i in range(0,4):
       if int(latest_tokens[i]) == int(client_tokens[i]):
         continue
       return int(latest_tokens[i]) > int(client_tokens[i])
     return False
 
+  def UnpackRootfs(self, image_path, rootfs_file):
+    if os.path.exists(rootfs_file):
+      return True
+    if self.test_image:
+      image_file = 'chromiumos_test_image.bin'
+    else:
+      image_file = 'chromiumos_image.bin'
+    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_3'), rootfs_file)
+    os.system('rm -f %s/part_*' % image_path)
+    return True
+
   def BuildUpdateImage(self, image_path):
     if self.test_image:
       image_file = '%s/rootfs_test.image' % image_path
     else:
       image_file = '%s/rootfs.image' % image_path
+
+    if not self.UnpackRootfs(image_path, image_file):
+      web.debug('failed to unpack rootfs.')
+      return False
+
     update_file = '%s/update.gz' % image_path
     if (os.path.exists(update_file) and
         os.path.getmtime(update_file) >= os.path.getmtime(image_file)):
       web.debug('Found cached update image %s/update.gz' % image_path)
     else:
       web.debug('generating update image %s/update.gz' % image_path)
       mkupdate = '%s/mk_memento_images.sh %s' % (self.scripts_dir, image_file)
       web.debug(mkupdate)
       err = os.system(mkupdate)
       if err != 0:
@@ skipping 56 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)