not.py
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#===----------------------------------------------------------------------===##
#
# Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
# See https://llvm.org/LICENSE.txt for license information.
# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
#
#===----------------------------------------------------------------------===##
"""not.py is a utility for inverting the return code of commands.
It acts similar to llvm/utils/not.
ex: python /path/to/not.py ' echo hello
echo $? // (prints 1)
"""
import subprocess
import sys
def which_cannot_find_program(prog):
# Allow for import errors on distutils.spawn
try:
import distutils.spawn
prog = distutils.spawn.find_executable(prog[0])
if prog is None:
sys.stderr.write('Failed to find program %s' % prog[0])
return True
return False
except:
return False
def main():
argv = list(sys.argv)
del argv[0]
if len(argv) > 0 and argv[0] == '--crash':
del argv[0]
expectCrash = True
else:
expectCrash = False
if len(argv) == 0:
return 1
if which_cannot_find_program(argv[0]):
return 1
rc = subprocess.call(argv)
if rc < 0:
return 0 if expectCrash else 1
if expectCrash:
return 1
return rc == 0
if __name__ == '__main__':
exit(main())