Cross-repo recipe package system.

scripts/slave/unittests/recipe_simulation_test.py

Index: scripts/slave/unittests/recipe_simulation_test.py
diff --git a/scripts/slave/unittests/recipe_simulation_test.py b/scripts/slave/unittests/recipe_simulation_test.py
index abb4bedc7d6155dabb78b9c40e0e7b1f2577e815..5e5b9315f5383fcd893b45a85317d8933bd70e25 100755
--- a/scripts/slave/unittests/recipe_simulation_test.py
+++ b/scripts/slave/unittests/recipe_simulation_test.py
@@ -4,12 +4,22 @@
 # found in the LICENSE file.
 
 import os
+import shutil
 import sys
 
 import test_env  # pylint: disable=W0403,W0611
 
-from recipe_engine import simulation_test
-from slave import recipe_universe
+# Delete the old recipe_engine directory which might have stale pyc files
+# that will mess us up.
+shutil.rmtree(os.path.join(
+        os.path.dirname(os.path.dirname(os.path.dirname(os.path.dirname(
+            os.path.realpath(__file__))))),
+        'third_party', 'recipe_engine'),
+    ignore_errors=True)
 
-if __name__ == '__main__':
-  simulation_test.main(recipe_universe.get_universe())
+RECIPES_PY = os.path.join(
+    os.path.dirname(os.path.dirname(os.path.realpath(__file__))),
+    'recipes.py')
+
+args = [sys.argv[0], 'simulation_test'] + sys.argv[1:]
+os.execvp(RECIPES_PY, args)