Don't delete directories that have been superseded by a broader checkout.

gclient_scm.py

 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """Gclient-specific SCM-specific operations."""
 
 import logging
 import os
 import posixpath
 import re
@@ skipping 151 matching lines @@
     """Returns true if the command exists."""
     try:
       # We assume git is newer than 1.7.  See: crbug.com/114483
       result, version = scm.GIT.AssertVersion('1.7')
       if not result:
         raise gclient_utils.Error('Git version is older than 1.7: %s' % version)
       return result
     except OSError:
       return False
 
+  def GetCheckoutRoot(self):
+    return scm.GIT.GetCheckoutRoot(self.checkout_path)
+
   def GetRevisionDate(self, revision):
     """Returns the given revision's date in ISO-8601 format (which contains the
     time zone)."""
     # TODO(floitsch): get the time-stamp of the given revision and not just the
     # time-stamp of the currently checked out revision.
     return self._Capture(['log', '-n', '1', '--format=%ai'])
 
   @staticmethod
   def cleanup(options, args, file_list):
     """'Cleanup' the repo.
@@ skipping 721 matching lines @@
   def BinaryExists():
     """Returns true if the command exists."""
     try:
       result, version = scm.SVN.AssertVersion('1.4')
       if not result:
         raise gclient_utils.Error('SVN version is older than 1.4: %s' % version)
       return result
     except OSError:
       return False
 
+  def GetCheckoutRoot(self):
+    return scm.SVN.GetCheckoutRoot(self.checkout_path)
+
   def GetRevisionDate(self, revision):
     """Returns the given revision's date in ISO-8601 format (which contains the
     time zone)."""
     date = scm.SVN.Capture(
         ['propget', '--revprop', 'svn:date', '-r', revision],
         os.path.join(self.checkout_path, '.'))
     return date.strip()
 
   def cleanup(self, options, args, file_list):
     """Cleanup working copy."""
@@ skipping 352 matching lines @@
       new_command.append('--force')
       if command[0] != 'checkout' and scm.SVN.AssertVersion('1.6')[0]:
         new_command.extend(('--accept', 'theirs-conflict'))
     elif options.manually_grab_svn_rev:
       new_command.append('--force')
       if command[0] != 'checkout' and scm.SVN.AssertVersion('1.6')[0]:
         new_command.extend(('--accept', 'postpone'))
     elif command[0] != 'checkout' and scm.SVN.AssertVersion('1.6')[0]:
       new_command.extend(('--accept', 'postpone'))
     return new_command