[Android] Adds directory cleanup/creation for code coverage

build/android/buildbot/bb_device_steps.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.
 
 import collections
 import glob
 import hashlib
 import multiprocessing
 import os
@@ skipping 250 matching lines @@
 
 def DeviceStatusCheck(_):
   bb_annotations.PrintNamedStep('device_status_check')
   RunCmd(['build/android/buildbot/bb_device_status_check.py'],
          halt_on_failure=True)
 
 
 def GetDeviceSetupStepCmds():
   return [
     ('provision_devices', ProvisionDevices),
-    ('device_status_check', DeviceStatusCheck)
+    ('device_status_check', DeviceStatusCheck),
+    ('coverage_setup', CoverageSetup)
   ]
 
 
 def RunUnitTests(options):
   RunTestSuites(options, gtest_config.STABLE_TEST_SUITES)
 
 
 def RunInstrumentationTests(options):
   for test in INSTRUMENTATION_TESTS.itervalues():
     RunInstrumentationSuite(options, test)
@@ skipping 12 matching lines @@
   return [
       ('chromedriver', RunChromeDriverTests),
       ('unit', RunUnitTests),
       ('ui', RunInstrumentationTests),
       ('webkit', RunWebkitTests),
       ('webkit_layout', RunWebkitLayoutTests),
       ('webrtc', RunWebRTCTests),
   ]
 
 
+def CoverageSetup(options):
+  """Sets up the coverage directory as a buildbot step."""
+  if options.coverage_bucket:
+    bb_annotations.PrintNamedStep('coverage_setup')
+    print 'Clearing the coverange directory: %s' % options.coverage_dir
+    shutil.rmtree(options.coverage_dir, ignore_errors=True)
+    os.mkdir(options.coverage_dir)

[frankf, 2013/08/24 02:17:19]

It makes more sense to do this in pylib/instrumentation/setup.py

+
+
 def UploadCoverageData(options, path, coverage_type):
   """Uploads directory at |path| to Google Storage.
 
   The directory at path should ostensibly contain HTML coverage data.
 
   Args:
     options: Command line options.
     path: Path to the directory to be uploaded.
     coverage_type: String used as the first component of the url.
 
@@ skipping 120 matching lines @@
   setattr(options, 'target', options.factory_properties.get('target', 'Debug'))
   if options.coverage_bucket:
     setattr(options, 'coverage_dir',
             os.path.join(CHROME_SRC, 'out', options.target, 'coverage'))
 
   MainTestWrapper(options)
 
 
 if __name__ == '__main__':
   sys.exit(main(sys.argv))