Added separate checkout and config file generation to bisect script

build/util/run-bisect-perf-regression.py

+#!/usr/bin/env python
+# Copyright (c) 2013 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.
+
+"""Run Performance Test Bisect Tool
+
+This script is used by a trybot to run the src/tools/bisect-perf-regression.py
+script with the parameters specified in run-bisect-perf-regression.cfg.
+
+
+"""
+
+import imp
+import os
+import subprocess
+import sys
+
+
+try:
+  cfg_file = imp.load_source('config', 'run-bisect-perf-regression.cfg')
+
+  # Change to /src
+  os.chdir(os.path.join('..', '..'))
+
+
+  cmd = [os.path.join('tools', 'bisect-perf-regression.py'),
+         '-c', cfg_file.config['command'],
+         '-g', cfg_file.config['good_revision'],
+         '-b', cfg_file.config['bad_revision'],
+         '-m', cfg_file.config['metric'],
+         '--output_buildbot_annotations']
+  return_code = subprocess.call(cmd)
+
+  if return_code:
+    print 'Error: bisect-perf-regression.py returned with error %d' %\
+      return_code
+    print
+    sys.exit(1)
+except KeyError:
+  print 'Error: Malformed config file.'
+  print
+  sys.exit(1)
+except TypeError:
+  print 'Error: Could not load config parameters.'
+  print
+  sys.exit(1)
+except IOError:
+  print 'Error: Could not load config file.'
+  print
+  sys.exit(1)
+