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 the Native Client validator (ncval).
   7 """
   8
   9 import argparse
  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, 7, 0):
  20   sys.stderr.write("python 2.7 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(args):
  32   parser = argparse.ArgumentParser(description=__doc__)
  33   parser.add_argument('-v', '--verbose', action='store_true',
  34                       help='Verbose output')
  35   parser.add_argument('nexe', metavar="EXE", help='Executable to validate')
  36
  37   # To enable bash completion for this command first install optcomplete
  38   # and then add this line to your .bashrc:
  39   #  complete -F _optcomplete ncval.py
  40   try:
  41     import optcomplete
  42     optcomplete.autocomplete(parser)
  43   except ImportError:
  44     pass
  45
  46   options = parser.parse_args(args)
  47   nexe = options.nexe
  48
  49   if options.verbose:
  50     Log.verbose = True
  51
  52   # TODO(binji): http://crbug.com/321791. Fix ncval upstream to reduce the
  53   # amount of additional checking done here.
  54   osname = getos.GetPlatform()
  55   if not os.path.exists(nexe):
  56     raise Error('executable not found: %s' % nexe)
  57   if not os.path.isfile(nexe):
  58     raise Error('not a file: %s' % nexe)
  59
  60   ncval = os.path.join(SCRIPT_DIR, 'ncval')
  61   if osname == 'win':
  62     ncval += '.exe'
  63
  64   cmd = [ncval, nexe]
  65   Log('Running %s' % ' '.join(cmd))
  66   proc = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
  67   proc_out, _ = proc.communicate()
  68   if proc.returncode:
  69     # ncval doesn't print anything to stderr.
  70     sys.stderr.write('Validating %s failed:\n' % nexe)
  71     sys.stderr.write(proc_out + '\n')
  72
  73     Log('Changing the modification time of %s to 0.' % nexe)
  74     # "untouch" the executable; that is, change the modification time to be so
  75     # old that it will be remade when `make` runs.
  76     statinfo = os.stat(nexe)
  77     mtime = 0
  78     os.utime(nexe, (statinfo.st_atime, mtime))
  79
  80     return proc.returncode
  81   elif options.verbose:
  82     # By default, don't print anything on success.
  83     Log(proc_out)
  84
  85
  86 if __name__ == '__main__':
  87   try:
  88     sys.exit(main(sys.argv[1:]))
  89   except Error as e:
  90     sys.stderr.write(str(e) + '\n')
  91     sys.exit(1)