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

native_client_sdk/src/build_tools/build_projects.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 argparse
 import multiprocessing
-import optparse
 import os
 import posixpath
 import sys
 import urllib2
 
 import buildbot_common
 import build_version
 import generate_make
 import parse_dsc
 
@@ skipping 218 matching lines @@
                   clean=False, config='Debug'):
   # Make sure we build libraries (which live in 'src') before
   # any of the examples.
   build_first = [p for p in project_tree if p != 'src']
   build_second = [p for p in project_tree if p == 'src']
 
   for branch in build_first + build_second:
     BuildProjectsBranch(pepperdir, branch, deps, clean, config)
 
 
-def main(argv):
-  parser = optparse.OptionParser()
-  parser.add_option('-c', '--clobber',
+def main(args):
+  parser = argparse.ArgumentParser(description=__doc__)
+  parser.add_argument('-c', '--clobber',
       help='Clobber project directories before copying new files',
       action='store_true', default=False)
-  parser.add_option('-b', '--build',
+  parser.add_argument('-b', '--build',
       help='Build the projects. Otherwise the projects are only copied.',
       action='store_true')
-  parser.add_option('--config',
+  parser.add_argument('--config',
       help='Choose configuration to build (Debug or Release).  Builds both '
            'by default')
-  parser.add_option('--bionic',
+  parser.add_argument('--bionic',
       help='Enable bionic projects', action='store_true')
-  parser.add_option('-x', '--experimental',
+  parser.add_argument('-x', '--experimental',
       help='Build experimental projects', action='store_true')
-  parser.add_option('-t', '--toolchain',
+  parser.add_argument('-t', '--toolchain',
       help='Build using toolchain. Can be passed more than once.',
       action='append', default=[])
-  parser.add_option('-d', '--dest',
+  parser.add_argument('-d', '--dest',
       help='Select which build destinations (project types) are valid.',
       action='append')
-  parser.add_option('-v', '--verbose', action='store_true')
+  parser.add_argument('projects', nargs='*',
+      help='Select which projects to build.')
+  parser.add_argument('-v', '--verbose', action='store_true')
 
   # To setup bash completion for this command first install optcomplete
   # and then add this line to your .bashrc:
   #  complete -F _optcomplete build_projects.py
   try:
     import optcomplete
     optcomplete.autocomplete(parser)
   except ImportError:
     pass
 
-  options, args = parser.parse_args(argv)
+  options = parser.parse_args(args)
 
   global verbose
   if options.verbose:
     verbose = True
 
   buildbot_common.verbose = verbose
 
   if 'NACL_SDK_ROOT' in os.environ:
     # We don't want the currently configured NACL_SDK_ROOT to have any effect
     # on the build.
@@ skipping 20 matching lines @@
 
   filters = {}
   if options.toolchain:
     filters['TOOLS'] = options.toolchain
     Trace('Filter by toolchain: ' + str(options.toolchain))
   if not options.experimental:
     filters['EXPERIMENTAL'] = False
   if options.dest:
     filters['DEST'] = options.dest
     Trace('Filter by type: ' + str(options.dest))
-  if args:
-    filters['NAME'] = args
-    Trace('Filter by name: ' + str(args))
+  if options.projects:
+    filters['NAME'] = options.projects
+    Trace('Filter by name: ' + str(options.projects))
 
   try:
     project_tree = parse_dsc.LoadProjectTree(SDK_SRC_DIR, include=filters)
   except parse_dsc.ValidationError as e:
     buildbot_common.ErrorExit(str(e))
 
   if verbose:
     parse_dsc.PrintProjectTree(project_tree)
 
   UpdateHelpers(pepperdir, clobber=options.clobber)
@@ skipping 12 matching lines @@
 
 
 if __name__ == '__main__':
   script_name = os.path.basename(sys.argv[0])
   try:
     sys.exit(main(sys.argv[1:]))
   except parse_dsc.ValidationError as e:
     buildbot_common.ErrorExit('%s: %s' % (script_name, e))
   except KeyboardInterrupt:
     buildbot_common.ErrorExit('%s: interrupted' % script_name)