text: #!/usr/bin/env python
  # Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
  #
  # Use of this source code is governed by a BSD-style license
  # that can be found in the LICENSE file in the root of the source
  # tree. An additional intellectual property rights grant can be found
  # in the file PATENTS.  All contributing project authors may
  # be found in the AUTHORS file in the root of the source tree.
  
  """Checks for legacy root directory and instructs the user how to upgrade."""
  
  import os
  import sys
  
  SOLUTION_ROOT_DIR = os.path.join(os.path.dirname(os.path.abspath(__file__)),
                                   os.pardir)
  MESSAGE = """\
  @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
                        A C T I O N     R E Q I R E D
  @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
  
  It looks like you have a legacy checkout where the solution's top-level
  directory is named 'trunk'. From now on, it must be named 'src'.
  
  What you need to do is to:
  
  1. Edit your .gclient file and change the solution name from 'trunk' to 'src'
  2. Rename your 'trunk' directory to 'src'
  3. Re-run gclient sync (or gclient runhooks)"""
  
  
  def main():
    gclient_filename = os.path.join(SOLUTION_ROOT_DIR, '.gclient')
    config_dict = {}
    try:
      with open(gclient_filename, 'rb') as gclient_file:
        exec(gclient_file, config_dict)
      for solution in config_dict.get('solutions', []):
        if solution['name'] == 'trunk':
          print MESSAGE
          if solution.get('custom_vars', {}).get('root_dir'):
            print ('4. Optional: Remove your "root_dir" entry from the '
                   'custom_vars dictionary of the solution.')
  
          # Remove the gclient cache file to avoid an error on the next sync.
          entries_file = os.path.join(SOLUTION_ROOT_DIR, '.gclient_entries')
          if os.path.exists(entries_file):
            os.unlink(entries_file)
          return 1
      return 0
    except Exception as e:
      print >> sys.stderr, "Error while parsing .gclient: ", e
      return 1
  
  
  if __name__ == '__main__':
    sys.exit(main())
  