[Predator] Add local cache for get command output.

appengine/findit/util_scripts/script_util.py

Index: appengine/findit/util_scripts/script_util.py
diff --git a/appengine/findit/util_scripts/script_util.py b/appengine/findit/util_scripts/script_util.py
index dc4da5cf06aa4618ecacfb9279df174e69ab996d..1386357d9855ef952e71c8400febace7bac7b282 100644
--- a/appengine/findit/util_scripts/script_util.py
+++ b/appengine/findit/util_scripts/script_util.py
@@ -9,6 +9,9 @@ import os
 import subprocess
 import sys
 
+from lib.cache_decorator import Cached
+from local_cache import LocalCacher  # pylint: disable=W
+
 
 def SetUpSystemPaths():  # pragma: no cover
   """Sets system paths so as to import modules in findit, third_party and
@@ -29,8 +32,8 @@ def SetUpSystemPaths():  # pragma: no cover
   sys.path.insert(1, findit_root_dir)
 
 
-# TODO(katesonia): Add local cache for this function.
-def GetCommandOutput(command):
+@Cached(namespace='Command-output', cacher=LocalCacher())
+def GetCommandOutput(command):  # pragma: no cover
   """Gets the output stream of executable command.
 
   Args: