Cross-repo recipe package system.

third_party/recipe_engine/simulation_test.py

Index: third_party/recipe_engine/simulation_test.py
diff --git a/third_party/recipe_engine/simulation_test.py b/third_party/recipe_engine/simulation_test.py
index 4a9b2cd1869c79bab82d14d01c722c7fd5028d22..07578ed44dd2d64c7a3b171a88048197ac3934a3 100644
--- a/third_party/recipe_engine/simulation_test.py
+++ b/third_party/recipe_engine/simulation_test.py
@@ -74,14 +74,18 @@ def GenerateTests():
       )
 
 
-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.
@@ -93,6 +97,11 @@ def main(universe):
       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)