Copy git tooling into testing_support.

setup.py

+#!/usr/bin/env python
+# Copyright 2014 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+try:
+  from setuptools import setup
+except ImportError:
+  from distutils.core import setup
+
+import ast
+
+
+def read_vars(path):
+  ret = {}
+  with open(path) as f:
+    for n in ast.walk(ast.parse(f.read())):
+      if isinstance(n, ast.Module):
+        ret['__doc__'] = ast.get_docstring(n)
+      elif isinstance(n, ast.Assign):
+        if isinstance(n.targets[0], ast.Name) and isinstance(n.value, ast.Str):
+          ret[n.targets[0].id] = n.value.s
+  return ret
+
+
+NAME = 'testing_support'
+VARS = read_vars(NAME + '/__init__.py')
+
+
+setup(
+  name=NAME,
+  version=VARS['__version__'],
+  description=VARS['__doc__'].splitlines()[0],
+  long_description=open('README.md').read(),
+  author=VARS['__author__'],
+  author_email=VARS['__email__'],
+  url=VARS['__url__'],
+  packages=[NAME],
+)