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

native_client_sdk/src/tools/decode_dump.py

 #!/usr/bin/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.
 
 """Utility to decode a crash dump generated by untrusted_crash_dump.[ch]
 
 Currently this produces a simple stack trace.
 """
 
 import json
-import optparse
+import argparse

[binji, 2014/11/13 23:57:03]

sort

[Sam Clegg, 2014/11/30 17:55:12]

Done.

 import os
 import posixpath
 import subprocess
 import sys
 
 
 class CoreDecoder(object):
   """Class to process core dumps."""
 
   def __init__(self, main_nexe, nmf_filename,
@@ skipping 147 matching lines @@
       out: file like object to output the trace to.
     """
     for scope in trace:
       out.write('%s at %s:%d\n' % (
           scope['function'],
           scope['filename'],
           scope['lineno']))
 
 
 def Main(args):
-  parser = optparse.OptionParser(
+  parser = argparse.ArgumentParser(
       usage='USAGE: %prog [options] <core.json>')

[binji, 2014/11/13 23:57:03]

remove usage

[Sam Clegg, 2014/11/30 17:55:12]

Done.

-  parser.add_option('-m', '--main-nexe', dest='main_nexe',
+  parser.add_argument('-m', '--main-nexe', dest='main_nexe',
                     help='nexe to resolve NaClMain references from')
-  parser.add_option('-n', '--nmf', dest='nmf_filename', default='-',
+  parser.add_argument('-n', '--nmf', dest='nmf_filename', default='-',
                     help='nmf to resolve references from')
-  parser.add_option('-a', '--addr2line', dest='addr2line',
+  parser.add_argument('-a', '--addr2line', dest='addr2line',
                     help='path to appropriate addr2line')
-  parser.add_option('-L', '--library-path', dest='library_paths',
+  parser.add_argument('-L', '--library-path', dest='library_paths',
                     action='append', default=[],
                     help='path to search for shared libraries')
-  parser.add_option('-p', '--platform', dest='platform',
+  parser.add_argument('-p', '--platform', dest='platform',
                     help='platform in a style match nmf files')
   options, args = parser.parse_args(args)

[binji, 2014/11/13 23:57:03]

options = ...

[Sam Clegg, 2014/11/30 17:55:12]

Done.

   if len(args) != 1:

[binji, 2014/11/13 23:57:03]

add positional arg

[Sam Clegg, 2014/11/30 17:55:12]

Done.

     parser.print_help()
     sys.exit(1)
   decoder = CoreDecoder(
       main_nexe=options.main_nexe,
       nmf_filename=options.nmf_filename,
       addr2line=options.add2line,
       library_paths=options.library_paths,
       platform=options.platform)
   info = decoder.LoadAndDecode(args[0])
   trace = decoder.StackTrace(info)
   decoder.PrintTrace(trace, sys.stdout)
 
 
 if __name__ == '__main__':
   Main(sys.argv[1:])