Add name, package_repo_resource and resource support to recipe scripts.

recipe_engine/util.py

 # Copyright 2013 The LUCI Authors. All rights reserved.
 # Use of this source code is governed under the Apache License, Version 2.0
 # that can be found in the LICENSE file.
 
 import contextlib
 import datetime
 import functools
 import logging
 import os
 import sys
@@ skipping 110 matching lines @@
   def inner(self, *args, **kwargs):
     ret = static_call(self, func, *args, **kwargs)
     assert isinstance(ret, Placeholder)
     ret.namespaces = (self.name, static_name(self, func))
     return ret
   # prevent this placeholder-returning function from becoming a composite_step.
   inner._non_step = True # pylint: disable=protected-access
   return inner
 
 
-def scan_directory(path, predicate):
-  """Recursively scans a directory and yields paths that match predicate."""
-  for root, _dirs, files in os.walk(path):
-    for file_name in (f for f in files if predicate(f)):
-      file_path = os.path.join(root, file_name)
-      yield file_path
-
-
 BUG_LINK = (
     'https://code.google.com/p/chromium/issues/entry?%s' % urllib.urlencode({
         'summary': 'Recipe engine bug: unexpected failure',
         'comment': 'Link to the failing build and paste the exception here',
         'labels': 'Infra,Infra-Area-Recipes,Pri-1,Restrict-View-Google,'
                   'Infra-Troopers',
         'cc': 'martiniss@chromium.org,iannucci@chromium.org',
     }))
 
 
@@ skipping 161 matching lines @@
     it (iterable): An iterable to traverse.
     exc_types (list): An optional list of specific exception types to defer.
         If empty, Exception will be used. Any Exceptions not referenced by this
         list will skip deferring and be immediately raised.
   """
   mexc_builder = MultiException.Builder()
   for e in it:
     with mexc_builder.catch(*exc_types):
       fn(e)
   mexc_builder.raise_if_any()