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      1 """not.py is a utility for inverting the return code of commands.
      2 It acts similar to llvm/utils/not.
      3 ex: python /path/to/not.py ' echo hello
      4     echo $? // (prints 1)
      5 """
      6 
      7 import distutils.spawn
      8 import subprocess
      9 import sys
     10 
     11 
     12 def main():
     13     argv = list(sys.argv)
     14     del argv[0]
     15     if len(argv) > 0 and argv[0] == '--crash':
     16         del argv[0]
     17         expectCrash = True
     18     else:
     19         expectCrash = False
     20     if len(argv) == 0:
     21         return 1
     22     prog = distutils.spawn.find_executable(argv[0])
     23     if prog is None:
     24         sys.stderr.write('Failed to find program %s' % argv[0])
     25         return 1
     26     rc = subprocess.call(argv)
     27     if rc < 0:
     28         return 0 if expectCrash else 1
     29     if expectCrash:
     30         return 1
     31     return rc == 0
     32 
     33 
     34 if __name__ == '__main__':
     35     exit(main())
     36