native_client_sdk/src/tools/ncval.py

   1 #!/usr/bin/env python
   2 # Copyright 2013 The Chromium Authors. All rights reserved.
   3 # Use of this source code is governed by a BSD-style license that can be
   4 # found in the LICENSE file.
   5
   6 """Wrapper script for running ncval.
   7 """
   8
   9 import optparse
  10 import os
  11 import subprocess
  12 import sys
  13
  14 import getos
  15
  16 SCRIPT_DIR = os.path.dirname(os.path.abspath(__file__))
  17 NACL_SDK_ROOT = os.path.dirname(SCRIPT_DIR)
  18
  19 if sys.version_info < (2, 6, 0):
  20   sys.stderr.write("python 2.6 or later is required run this script\n")
  21   sys.exit(1)
  22
  23 class Error(Exception):
  24   pass
  25
  26 def Log(msg):
  27   if Log.verbose:
  28     sys.stderr.write(str(msg) + '\n')
  29 Log.verbose = False
  30
  31 def main(argv):
  32   usage = 'Usage: %prog [options] <.nexe | .so>'
  33   epilog = 'Example: ncval.py my_nexe.nexe'
  34   parser = optparse.OptionParser(usage, description=__doc__, epilog=epilog)
  35   parser.add_option('-v', '--verbose', action='store_true',
  36                     help='Verbose output')
  37
  38   # To enable bash completion for this command first install optcomplete
  39   # and then add this line to your .bashrc:
  40   #  complete -F _optcomplete ncval.py
  41   try:
  42     import optcomplete
  43     optcomplete.autocomplete(parser)
  44   except ImportError:
  45     pass
  46
  47   options, args = parser.parse_args(argv)
  48   if not args:
  49     parser.error('No executable file specified')
  50
  51   nexe = args[0]
  52   if options.verbose:
  53     Log.verbose = True
  54
  55   # TODO(binji): http://crbug.com/321791. Fix ncval upstream to reduce the
  56   # amount of additional checking done here.
  57   osname = getos.GetPlatform()
  58   if not os.path.exists(nexe):
  59     raise Error('executable not found: %s' % nexe)
  60   if not os.path.isfile(nexe):
  61     raise Error('not a file: %s' % nexe)
  62
  63   ncval = os.path.join(SCRIPT_DIR, 'ncval')
  64   if osname == 'win':
  65     ncval += '.exe'
  66
  67   cmd = [ncval, nexe]
  68   Log('Running %s' % ' '.join(cmd))
  69   proc = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
  70   proc_out, _ = proc.communicate()
  71   if proc.returncode:
  72     # ncval doesn't print anything to stderr.
  73     sys.stderr.write('Validating %s failed:\n' % nexe)
  74     sys.stderr.write(proc_out + '\n')
  75
  76     Log('Changing the modification time of %s to 0.' % nexe)
  77     # "untouch" the executable; that is, change the modification time to be so
  78     # old that it will be remade when `make` runs.
  79     statinfo = os.stat(nexe)
  80     mtime = 0
  81     os.utime(nexe, (statinfo.st_atime, mtime))
  82
  83     return proc.returncode
  84   elif options.verbose:
  85     # By default, don't print anything on success.
  86     Log(proc_out)
  87
  88
  89 if __name__ == '__main__':
  90   try:
  91     sys.exit(main(sys.argv[1:]))
  92   except Error as e:
  93     sys.stderr.write(str(e) + '\n')
  94     sys.exit(1)