gclient: Prune dangling remote tracking refs when fetching with --force

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."""
 
 from __future__ import print_function
 
 import errno
 import logging
@@ skipping 1217 matching lines @@
                     '^\\+refs/branch-heads/\\*:.*$']
       self._Run(config_cmd, options)
       need_fetch = True
     if hasattr(options, 'with_tags') and options.with_tags:
       config_cmd = ['config', 'remote.%s.fetch' % self.remote,
                     '+refs/tags/*:refs/tags/*',
                     '^\\+refs/tags/\\*:.*$']
       self._Run(config_cmd, options)
       need_fetch = True
     if fetch and need_fetch:
-      self._Fetch(options)
+      self._Fetch(options, prune=options.force)
 
   def _Run(self, args, options, show_header=True, **kwargs):
     # Disable 'unused options' warning | pylint: disable=W0613
     kwargs.setdefault('cwd', self.checkout_path)
     kwargs.setdefault('stdout', self.out_fh)
     kwargs['filter_fn'] = self.filter
     kwargs.setdefault('print_stdout', False)
     env = scm.GIT.ApplyEnvVars(kwargs)
     cmd = ['git'] + args
     if show_header:
@@ skipping 480 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