def _run(cls, command, *args, **kwargs):
"""
Run a command. Convenience wrapper for subprocess.check_call and subprocess.check_output.
:param str command: The command to be run.
:param str args: Any arguments to be passed to the command.
:param Any kwargs: keyword arguments for subprocess.Popen constructor. Pass capture=True
to have the process' stdout returned. Pass input='some string' to feed input to the
process' stdin.
:rtype: None|str
:return: The output of the process' stdout if capture=True was passed, None otherwise.
"""
args = list(concat(command, args))
log.info('Running %r', args)
capture = kwargs.pop('capture', False)
_input = kwargs.pop('input', None)
if capture:
kwargs['stdout'] = subprocess.PIPE
if _input is not None:
kwargs['stdin'] = subprocess.PIPE
popen = subprocess.Popen(args, **kwargs)
stdout, stderr = popen.communicate(input=_input)
assert stderr is None
if popen.returncode != 0:
raise subprocess.CalledProcessError(popen.returncode, args)
if capture:
return stdout
def run(self):
command = self.parasolCommand()
with self.lock:
self.popen = subprocess.Popen(command)
status = self.popen.wait()
if status != 0 and status != -signal.SIGKILL:
log.error("Command '%s' failed with %i.", command, status)
raise subprocess.CalledProcessError(status, command)
log.info('Exiting %s', self.__class__.__name__)
