Revert of Remove SVN and File support from gclient

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 374 matching lines @@
       # Check again for a revision in case an initial ref was specified
       # in the url, for example bla.git@refs/heads/custombranch
       revision = deps_revision
       managed = False
     if not revision:
       revision = default_rev
 
     if managed:
       self._DisableHooks()
 
+    if gclient_utils.IsDateRevision(revision):
+      # Date-revisions only work on git-repositories if the reflog hasn't
+      # expired yet. Use rev-list to get the corresponding revision.
+      #  git rev-list -n 1 --before='time-stamp' branchname
+      if options.transitive:
+        self.Print('Warning: --transitive only works for SVN repositories.')
+        revision = default_rev
+
     rev_str = ' at %s' % revision
     files = [] if file_list is not None else None
 
     printed_path = False
     verbose = []
     if options.verbose:
       self.Print('_____ %s%s' % (self.relpath, rev_str), timestamp=False)
       verbose = ['--verbose']
       printed_path = True
 
@@ skipping 1072 matching lines @@
                   os.path.join(self.checkout_path, d[1]))
               self.Print('Removing troublesome path %s' % path_to_remove)
               gclient_utils.rmtree(path_to_remove)
             else:
               self.Print(
                   'Not removing troublesome path %s automatically.' % d[1])
               if d[0][0] == '!':
                 self.Print('You can pass --force to enable automatic removal.')
               raise e
 
+    # Retrieve the current HEAD version because svn is slow at null updates.
+    if options.manually_grab_svn_rev and not revision:
+      from_info_live = scm.SVN.CaptureRemoteInfo(from_info['URL'])
+      revision = str(from_info_live['Revision'])
+      rev_str = ' at %s' % revision
+
     if from_info['URL'].rstrip('/') != base_url.rstrip('/'):
       # The repository url changed, need to switch.
       try:
         to_info = scm.SVN.CaptureRemoteInfo(url)
       except (gclient_utils.Error, subprocess2.CalledProcessError):
         # The url is invalid or the server is not accessible, it's safer to bail
         # out right now.
         raise gclient_utils.Error('This url is unreachable: %s' % url)
       can_switch = ((from_info['Repository Root'] != to_info['Repository Root'])
                     and (from_info['UUID'] == to_info['UUID']))
@@ skipping 209 matching lines @@
     # --accept was added to 'svn update' in svn 1.6.
     if not scm.SVN.AssertVersion('1.5')[0]:
       return new_command
 
     # It's annoying to have it block in the middle of a sync, just sensible
     # defaults.
     if options.force:
       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