bot_update: add depot_tools to PATH so that e.g. apply_issue can be found

recipe_modules/bot_update/api.py

 # Copyright 2014 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.
 
 
 """Recipe module to ensure a checkout is consistant on a bot."""
 
 from recipe_engine import recipe_api
 
 
@@ skipping 39 matching lines @@
 
   def __init__(self, *args, **kwargs):
       self._properties = {}
       super(BotUpdateApi, self).__init__(*args, **kwargs)
 
   def __call__(self, name, cmd, **kwargs):
     """Wrapper for easy calling of bot_update."""
     assert isinstance(cmd, (list, tuple))
     bot_update_path = self.resource('bot_update.py')
     kwargs.setdefault('infra_step', True)
+    kwargs.setdefault('env', {})
+    kwargs['env'].setdefault('PATH', '%(PATH)s')
+    kwargs['env']['PATH'] = self.m.path.pathsep.join([
+        str(self._module.PACKAGE_DIRECTORY), kwargs['env']['PATH']])
     return self.m.python(name, bot_update_path, cmd, **kwargs)
 
   @property
   def properties(self):
       return self._properties
 
   def ensure_checkout(self, gclient_config=None, suffix=None,
                       patch=True, update_presentation=True,
                       force=False, patch_root=None, no_shallow=False,
                       with_branch_heads=False, refs=None,
@@ skipping 198 matching lines @@
 
       # bot_update actually just sets root to be the folder name of the
       # first solution.
       if step_result.json.output['did_run']:
         co_root = step_result.json.output['root']
         cwd = kwargs.get('cwd', self.m.path['slave_build'])
         if 'checkout' not in self.m.path:
           self.m.path['checkout'] = cwd.join(*co_root.split(self.m.path.sep))
 
     return step_result