gclient: in managed mode, warn if .gclient has a mismatched URL

gclient.py

 #!/usr/bin/env python
 # 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.
 
 """Meta checkout manager supporting both Subversion and GIT."""
 # Files
 #   .gclient      : Current client configuration, written by 'config' command.
 #                   Format is a Python script defining 'solutions', a list whose
 #                   entries each are maps binding the strings "name" and "url"
@@ skipping 1026 matching lines @@
     if options.deps_os:
       enforced_os = options.deps_os.split(',')
     else:
       enforced_os = [self.DEPS_OS_CHOICES.get(sys.platform, 'unix')]
     if 'all' in enforced_os:
       enforced_os = self.DEPS_OS_CHOICES.itervalues()
     self._enforced_os = tuple(set(enforced_os))
     self._root_dir = root_dir
     self.config_content = None
 
+  def _CheckConfig(self):
+    """Verify that the config matches the state of the existing checked-out
+    solutions."""
+    for dep in self.dependencies:
+      if dep.managed and dep.url:
+        scm = gclient_scm.CreateSCM(dep.url, self.root_dir, dep.name)
+        actual_url = scm.GetActualRemoteURL()
+        if actual_url and not scm.DoesRemoteURLMatch():
+          print >> sys.stderr, ('''
+################################################################################
+################################### WARNING! ###################################
+################################################################################
+
+Your .gclient file seems to be broken. The requested URL is different from what
+is actually checked out in %(checkout_path)s. In the future this will be an
+error.
+
+Expected: %(expected_url)s (%(expected_scm)s)
+Actual:   %(actual_url)s (%(actual_scm)s)
+
+You should ensure that the URL listed in .gclient is correct and either change
+it or fix the checkout. If you're managing your own git checkout in
+%(checkout_path)s but the URL in .gclient is for an svn repository, you probably
+want to set 'managed': False in .gclient.
+
+################################################################################
+################################################################################
+################################################################################
+'''  % {'checkout_path': os.path.join(self.root_dir, dep.name),
+        'expected_url': dep.url,
+        'expected_scm': gclient_scm.GetScmName(dep.url),
+        'actual_url': actual_url,
+        'actual_scm': gclient_scm.GetScmName(actual_url)})
+
   def SetConfig(self, content):
     assert not self.dependencies
     config_dict = {}
     self.config_content = content
     try:
       exec(content, config_dict)
     except SyntaxError, e:
       gclient_utils.SyntaxErrorToError('.gclient', e)
 
     # Append any target OS that is not already being enforced to the tuple.
@@ skipping 230 matching lines @@
             print(('\nWARNING: \'%s\' is no longer part of this client.  '
                    'It is recommended that you manually remove it.\n') %
                       entry_fixed)
           else:
             # Delete the entry
             print('\n________ deleting \'%s\' in \'%s\'' % (
                 entry_fixed, self.root_dir))
             gclient_utils.rmtree(e_dir)
       # record the current list of entries for next time
       self._SaveEntries()
+    self._CheckConfig()
     return 0
 
   def PrintRevInfo(self):
     if not self.dependencies:
       raise gclient_utils.Error('No solution specified')
     # Load all the settings.
     work_queue = gclient_utils.ExecutionQueue(self._options.jobs, None, False)
     for s in self.dependencies:
       work_queue.enqueue(s)
     work_queue.flush({}, None, [], options=self._options)
@@ skipping 614 matching lines @@
     raise
   except (gclient_utils.Error, subprocess2.CalledProcessError), e:
     print >> sys.stderr, 'Error: %s' % str(e)
     return 1
 
 
 if '__main__' == __name__:
   sys.exit(Main(sys.argv[1:]))
 
 # vim: ts=2:sw=2:tw=80:et: