Create a temporary dir for patch to do its work.

checkout.py

 # coding=utf8
 # 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.
 """Manages a project checkout.
 
 Includes support for svn, git-svn and git.
 """
 
 import ConfigParser
@@ skipping 602 matching lines @@
             cmd = ['add', p.filename]
             if verbose:
               cmd.append('--verbose')
             stdout.append(self._check_output_git(cmd))
           else:
             # No need to do anything special with p.is_new or if not
             # p.diff_hunks. git apply manages all that already.
             cmd = ['apply', '--index', '-p%s' % p.patchlevel]
             if verbose:
               cmd.append('--verbose')
+            new_tmpdir = tempfile.mkdtemp('pfix')
+            old_tmpdir = os.environ['TMPDIR']

[Isaac (away), 2013/07/12 04:03:42]

are you sure this environment variable exists?

[groby-ooo-7-16, 2013/07/12 04:16:16]

Doesn't matter if it exists - according to the patch sources [1], it's the one
that takes precedence over all other environment variables.

[1]: http://gnuwin32.sourceforge.net/packages/patch.htm

On 2013/07/12 04:03:42, Isaac wrote:

+            os.environ['TMPDIR'] = new_tmpdir
             stdout.append(self._check_output_git(cmd, stdin=p.get(True)))
+            os.environ['TMPDIR'] = old_tmpdir
+            shutil.rmtree(new_tmpdir)

[Isaac (away), 2013/07/12 04:03:42]

this should be a try finally (with rmtree in the finally section)

[groby-ooo-7-16, 2013/07/12 04:16:16]

Done.

           for name, value in p.svn_properties:
             # Ignore some known auto-props flags through .subversion/config,
             # bails out on the other ones.
             # TODO(maruel): Read ~/.subversion/config and detect the rules that
             # applies here to figure out if the property will be correctly
             # handled.
             stdout.append('Property %s=%s' % (name, value))
             if not name in (
                 'svn:eol-style', 'svn:executable', 'svn:mime-type'):
               raise patch.UnsupportedPatchFormat(
@@ skipping 117 matching lines @@
   def revisions(self, rev1, rev2):
     return self.checkout.revisions(rev1, rev2)
 
   @property
   def project_name(self):
     return self.checkout.project_name
 
   @property
   def project_path(self):
     return self.checkout.project_path