[NaCl SDK] Convert python scripts from optparse to argparse.

native_client_sdk/src/build_tools/buildbot_run.py

 #!/usr/bin/env python
 # Copyright (c) 2012 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.
 
 """Main entry point for the NaCl SDK buildbot.
 
 The entry point used to be build_sdk.py itself, but we want
 to be able to simplify build_sdk (for example separating out
 the test code into test_sdk) and change its default behaviour
 while being able to separately control excactly what the bots
 run.
 """
 
+import argparse
 import buildbot_common
 import os
-import optparse
 import subprocess
 import sys
 
 from buildbot_common import Run
 from build_paths import SRC_DIR, SDK_SRC_DIR, SCRIPT_DIR
 import getos
 
 
 def StepArmRunHooks():
   if getos.GetPlatform() != 'linux':
@@ skipping 66 matching lines @@
     cmd.extend(['build_examples', 'copy_tests', 'build_tests'])
   Run(cmd, cwd=SCRIPT_DIR)
 
 
 def main(args):
   # Don't write out .pyc files in the source tree.  Without this, incremental
   # builds can fail when .py files are moved/deleted, since python could load
   # orphaned .pyc files generated by a previous run.
   os.environ['PYTHONDONTWRITEBYTECODE'] = '1'
 
-  parser = optparse.OptionParser(description=__doc__)
-  parser.add_option('--build-only', action='store_true',
+  parser = argparse.ArgumentParser(description=__doc__)
+  parser.add_argument('--build-only', action='store_true',
       help='Only build the SDK, don\'t build or run tests.')
-  parser.add_option('--build-properties',
+  parser.add_argument('--build-properties',
       help='JSON properties passed by buildbot. Currently ignored.')
-  parser.add_option('--factory-properties',
+  parser.add_argument('--factory-properties',
       help='JSON properties passed by buildbot. Currently ignored.')
-  options, args = parser.parse_args(args)
+  options = parser.parse_args(args)
 
   # Skip the testing phase if we are running on a build-only bots.
   if not options.build_only:
     # Infer build-only from bot name.
     # TODO(sbc): Remove this once buildbot script have been updated
     # to pass --build-only argument.
     if os.getenv('BUILDBOT_BUILDERNAME', '').endswith('build'):
       options.build_only = True
 
   StepArmRunHooks()
   StepRunUnittests()
   StepBuildSDK()
   if not options.build_only:
     StepTestSDK()
 
   return 0
 
 
 if __name__ == '__main__':
   try:
     sys.exit(main(sys.argv[1:]))
   except KeyboardInterrupt:
     buildbot_common.ErrorExit('buildbot_run: interrupted')