Rebuild chroot for full builders.

bin/cbuildbot.py

 #!/usr/bin/python
 
 # Copyright (c) 2010 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.
 
 """CBuildbot is wrapper around the build process used by the pre-flight queue"""
 
 import errno
 import heapq
@@ skipping 714 matching lines @@
         _IncrementalCheckout(buildroot)
 
     new_binhost = _GetPortageEnvVar(buildroot, board, _FULL_BINHOST)
     emptytree = (old_binhost and old_binhost != new_binhost)
 
     # Check that all overlays can be found.
     for path in rev_overlays:
       if not os.path.isdir(path):
         Die('Missing overlay: %s' % path)
 
-    if not os.path.isdir(chroot_path):
+    if not os.path.isdir(chroot_path) or buildconfig['chroot_replace']:
       _MakeChroot(buildroot, buildconfig['chroot_replace'])
 
     if not os.path.isdir(boardpath):
       _SetupBoard(buildroot, board=buildconfig['board'])
 
     # Perform chrome uprev.
     if options.chrome_rev:
       chrome_atom_to_build = _MarkChromeAsStable(buildroot, tracking_branch,
                                                  options.chrome_rev, board)
     # Perform other uprevs.
@@ skipping 59 matching lines @@
   except:
     # Send failure to master bot.
     if not buildconfig['master'] and buildconfig['important']:
       cbuildbot_comm.PublishStatus(cbuildbot_comm.STATUS_BUILD_FAILED)
 
     raise
 
 
 if __name__ == '__main__':
     main()