[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..9f6486dec46f1715cc1787c67ccc859236cbddeb 100644
--- a/appengine/findit/util_scripts/script_util.py
+++ b/appengine/findit/util_scripts/script_util.py
@@ -9,6 +9,12 @@ import os
 import subprocess
 import sys
 
+from lib.cache_decorator import Cached
+from local_cache import LocalCacher  # pylint: disable=W
+
+_COMMAND_OUPUT_CACHE_DIR = os.path.join(os.path.dirname(__file__),
+                                        '.command_output_cache')

[wrengr, 2016/11/11 18:26:26]

Wait, weren't we putting temp files in ~/.predator/* (or something like that)?
Why the change to putting them wherever the script lives?

[Sharu Jiang, 2016/11/12 01:01:50]

Oops.. should have put this into the ~/*

+
 
 def SetUpSystemPaths():  # pragma: no cover
   """Sets system paths so as to import modules in findit, third_party and
@@ -29,7 +35,8 @@ def SetUpSystemPaths():  # pragma: no cover
   sys.path.insert(1, findit_root_dir)
 
 
-# TODO(katesonia): Add local cache for this function.
+@Cached(namespace='Command-output',
+        cacher=LocalCacher(cache_dir=_COMMAND_OUPUT_CACHE_DIR))
 def GetCommandOutput(command):
   """Gets the output stream of executable command.