Cross-repo recipe package system.

third_party/recipe_engine/simulation_test.py

 # Copyright 2014-2015 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.
 
 """Provides simulator test coverage for individual recipes."""
 
 import logging
 import re
 import os
 import sys
@@ skipping 56 matching lines @@
       yield expect_tests.Test(
           '%s.%s' % (recipe_name, test_data.name),
           expect_tests.FuncCall(RunRecipe, test_data),
           expect_dir=expect_path,
           expect_base=test_data.name,
           covers=covers,
           break_funcs=(recipe.RunSteps,)
       )
 
 
-def main(universe):
+def main(package_cfg, args=None):
   """Runs simulation tests on a given repo of recipes.
 
   Args:
-    universe: a RecipeUniverse to operate on.
+    package_cfg: the path to a recipes.cfg to operate on, or
+        an existing PackageDeps object
+    args: command line arguments to expect_tests
   Returns:
     Doesn't -- exits with a status code
   """
+  from . import loader
+  from . import package
 
   # annotated_run has different behavior when these environment variables
   # are set, so unset to make simulation tests environment-invariant.
   for env_var in ['TESTING_MASTER_HOST',
                   'TESTING_MASTER',
                   'TESTING_SLAVENAME']:
     if env_var in os.environ:
       logging.warn("Ignoring %s environment variable." % env_var)
       os.environ.pop(env_var)
 
   global _UNIVERSE
-  _UNIVERSE = universe
+  if isinstance(package_cfg, package.PackageDeps):
+    package_deps = package_cfg
+  else:
+    package_deps = package.PackageDeps.create(package_cfg)
+  _UNIVERSE = loader.RecipeUniverse(package_deps)
+
   expect_tests.main('recipe_simulation_test', GenerateTests,
-                    cover_omit=cover_omit())
+                    cover_omit=cover_omit(), args=args)