[Findit] Add local_git_repository

appengine/findit/lib/gitiles/repo_util.py

Index: appengine/findit/lib/gitiles/repo_util.py
diff --git a/appengine/findit/lib/gitiles/repo_util.py b/appengine/findit/lib/gitiles/repo_util.py
index 790a6f796a45259a9e985d14aa3c860c5ca3c1e0..9bc811fe38069ca849419c2428d58890ff5848e4 100644
--- a/appengine/findit/lib/gitiles/repo_util.py
+++ b/appengine/findit/lib/gitiles/repo_util.py
@@ -2,7 +2,11 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
+import json
+import logging
 import re
+import subprocess
+import urllib2
 
 CODE_REVIEW_URL_PATTERN = re.compile(
     '^(?:Review URL|Review-Url): (.*\d+).*$', re.IGNORECASE)
@@ -69,3 +73,24 @@ def GetRevertedRevision(message):
     reverted_revision_match = REVERTED_REVISION_PATTERN.match(line)
     if reverted_revision_match:
       return reverted_revision_match.group(1)
+
+
+# TODO(katesonia): Add local cache for this function.
+def GetCommandOutput(command):
+  """Gets the output stream of executable command.
+
+  Args:
+    command (str): Command to execute to get output.
+
+  Return:
+    Output steam of the command.
+  """
+  p = subprocess.Popen(
+      command, stdout=subprocess.PIPE, stderr=subprocess.PIPE, shell=True)
+  stdoutdata, stderrdata = p.communicate()
+
+  if p.returncode != 0:
+    logging.error('Error running command %s: %s', command, stderrdata)
+    return None

[wrengr, 2016/11/01 20:26:53]

You probably want to throw an exception packaging up the ``p.returncode``,
``command``, and ``stderrdata``; that way callers can decide whether to eat the
error and return None, vs do something else instead (retry, recover some other
way, crash the program).

[Sharu Jiang, 2016/11/05 01:18:15]

Crashing the program working for local testing, but if this is in the production
code, I think we'd better use logging.error.

Let's decide the location of those local_* files first.

+
+  return stdoutdata