Handling the case when command paths start with ./src or .\src

scripts/slave/recipe_modules/bisect_tester/perf_test.py

 # Copyright 2015 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.
 
 import os
 import re
 import time
 
 from . import parse_metric
 
@@ skipping 169 matching lines @@
   metric.chart_name = chart
   has_valid_value, value, _ = parse_metric.parse_chartjson_metric(
       results, metric.as_pair())
   return has_valid_value, value
 
 def _rebase_path(api, file_path):
   """Attempts to make an absolute path for the command.
 
   We want to pass to runtest.py an absolute path if possible.
   """
-  if file_path.startswith('src/'):
-    return api.m.path['checkout'].join(*file_path.split('/')[1:])
-  elif file_path.startswith('src\\'):  # pragma: no cover
-    return api.m.path['checkout'].join(*file_path.split('\\')[1:])
+  if (file_path.startswith('src/') or file_path.startswith('./src/')):
+    return api.m.path['checkout'].join(
+        *file_path.split('src', 1)[1].split('/')[1:])
+  elif (file_path.startswith('src\\') or
+        file_path.startswith('.\\src\\')):  # pragma: no cover
+    return api.m.path['checkout'].join(
+        *file_path.split('src', 1)[1].split('\\')[1:])
   return file_path
 
 def _run_command(api, command, step_name):
   command_parts = command.split()
   stdout = api.m.raw_io.output()
   stderr = api.m.raw_io.output()
 
   # TODO(prasadv): Remove this once bisect runs are no longer running
   # against revisions from February 2016 or earlier.
   kwargs = {}
@@ skipping 28 matching lines @@
     step_result.presentation.logs['Captured Output'] = (
         step_result.stdout or '').splitlines()
   except api.m.step.StepFailure as sf:
     sf.result.presentation.logs['Failure Output'] = (
         sf.result.stdout or '').splitlines()
     if sf.result.stderr:  # pragma: no cover
       sf.result.presentation.logs['stderr'] = (
         sf.result.stderr).splitlines()
     return sf.result.stdout, sf.result.stderr, sf.result.retcode
   return step_result.stdout, step_result.stderr, step_result.retcode