def launch_repl(self, pex, **pex_run_kwargs):
# While the repl subprocess is synchronously spawned, we rely on process group
# signalling for a SIGINT to reach the repl subprocess directly - and want to
# do nothing in response on the parent side.
def ignore_control_c(signum, frame): pass
with signal_handler_as(signal.SIGINT, ignore_control_c):
env = pex_run_kwargs.pop('env', os.environ).copy()
pex.run(env=env, **pex_run_kwargs)
def test_signal_handler_as(self):
mock_initial_handler = 1
mock_new_handler = 2
with mock.patch('signal.signal', **PATCH_OPTS) as mock_signal:
mock_signal.return_value = mock_initial_handler
try:
with signal_handler_as(signal.SIGUSR2, mock_new_handler):
raise NotImplementedError('blah')
except NotImplementedError:
pass
self.assertEquals(mock_signal.call_count, 2)
mock_signal.assert_has_calls([
mock.call(signal.SIGUSR2, mock_new_handler),
mock.call(signal.SIGUSR2, mock_initial_handler)
])
def test_signal_handler_as(self):
mock_initial_handler = 1
mock_new_handler = 2
with unittest.mock.patch('signal.signal', **PATCH_OPTS) as mock_signal:
mock_signal.return_value = mock_initial_handler
try:
with signal_handler_as(signal.SIGUSR2, mock_new_handler):
raise NotImplementedError('blah')
except NotImplementedError:
pass
self.assertEqual(mock_signal.call_count, 2)
mock_signal.assert_has_calls([
unittest.mock.call(signal.SIGUSR2, mock_new_handler),
unittest.mock.call(signal.SIGUSR2, mock_initial_handler)
])
def launch_repl(self, perl6_env):
# TODO: this is a massive hack that should be removed from python_repl.py (this is the leading
# cause of interactivity issues in america!).
def ignore_control_c(signum, frame):
pass
with signal_handler_as(signal.SIGINT, ignore_control_c):
try:
# When called with no arguments, drops into a repl.
return self._perl6.invoke_perl6([], perl6_env)
except Perl6.Perl6InvocationError as e:
raise self.Perl6ReplError(
"Error in the perl6 repl: {}".format(e),
e,
exit_code=e.exit_code)
