gclient: git relative url implementation

gclient_scm.py

 # Copyright (c) 2009 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."""
 
 import logging
 import os
 import posixpath
 import re
@@ skipping 231 matching lines @@
     __pychecker__ = 'unusednames=args,options'
     if not os.path.isdir(self.checkout_path):
       print('\n________ couldn\'t run status in %s:\nThe directory '
             'does not exist.' % self.checkout_path)
     else:
       merge_base = self._Run(['merge-base', 'HEAD', 'origin'])
       self._Run(['diff', '--name-status', merge_base], redirect_stdout=False)
       files = self._Run(['diff', '--name-only', merge_base]).split()
       file_list.extend([os.path.join(self.checkout_path, f) for f in files])
 
+  def FullUrlForRelativeUrl(self, url):
+    # Strip from last '/'
+    # Equivalent to unix basename
+    base_url = self.url
+    return base_url[:base_url.rfind('/')] + url
+
   def _CheckMinVersion(self, min_version):
     def only_int(val):
       if val.isdigit():
         return int(val)
       else:
         return 0
     version = self._Run(['--version'], cwd='.').split()[-1]
     version_list = map(only_int, version.split('.'))
     min_version_list = map(int, min_version.split('.'))
     for min_ver in min_version_list:
@@ skipping 259 matching lines @@
     command = ['status']
     command.extend(args)
     if not os.path.isdir(path):
       # svn status won't work if the directory doesn't exist.
       print("\n________ couldn't run \'%s\' in \'%s\':\nThe directory "
             "does not exist."
             % (' '.join(command), path))
       # There's no file list to retrieve.
     else:
       self.RunAndGetFileList(options, command, path, file_list)
+
+  def FullUrlForRelativeUrl(self, url):
+    # Find the forth '/' and strip from there. A bit hackish.
+    return '/'.join(self.url.split('/')[:4]) + url