def test_discovery_interpreter_linux_auto():
res1 = u'PLATFORM\nLinux\nFOUND\n/usr/bin/python\n/usr/bin/python3.5\n/usr/bin/python3\nENDFOUND'
mock_action = MagicMock()
mock_action._low_level_execute_command.side_effect = [{'stdout': res1}, {'stdout': mock_ubuntu_platform_res}]
actual = discover_interpreter(mock_action, 'python', 'auto', {'inventory_hostname': u'host-fóöbär'})
assert actual == u'/usr/bin/python3'
assert len(mock_action.method_calls) == 2
def test_no_interpreters_found():
mock_action = MagicMock()
mock_action._low_level_execute_command.return_value = {'stdout': u'PLATFORM\nWindows\nFOUND\nENDFOUND'}
actual = discover_interpreter(mock_action, 'python', 'auto_legacy', {'inventory_hostname': u'host-fóöbär'})
assert actual == u'/usr/bin/python'
assert len(mock_action.method_calls) == 2
assert mock_action.method_calls[1][0] == '_discovery_warnings.append'
assert u'No python interpreters found for host host-fóöbär (tried' \
in mock_action.method_calls[1][1][0]
def run_interpreter_discovery_if_necessary(s, task_vars, action,
rediscover_python):
"""
Triggers ansible python interpreter discovery if requested.
Caches this value the same way Ansible does it.
For connections like `docker`, we want to rediscover the python interpreter because
it could be different than what's ran on the host
"""
# keep trying different interpreters until we don't error
if action._finding_python_interpreter:
return action._possible_python_interpreter
if s in ['auto', 'auto_legacy', 'auto_silent', 'auto_legacy_silent']:
# python is the only supported interpreter_name as of Ansible 2.8.8
interpreter_name = 'python'
discovered_interpreter_config = u'discovered_interpreter_%s' % interpreter_name
if task_vars.get('ansible_facts') is None:
task_vars['ansible_facts'] = {}
if rediscover_python and task_vars.get(
'ansible_facts', {}).get(discovered_interpreter_config):
# if we're rediscovering python then chances are we're running something like a docker connection
# this will handle scenarios like running a playbook that does stuff + then dynamically creates a docker container,
# then runs the rest of the playbook inside that container, and then rerunning the playbook again
action._rediscovered_python = True
# blow away the discovered_interpreter_config cache and rediscover
del task_vars['ansible_facts'][discovered_interpreter_config]
if discovered_interpreter_config not in task_vars['ansible_facts']:
action._finding_python_interpreter = True
# fake pipelining so discover_interpreter can be happy
action._connection.has_pipelining = True
s = AnsibleUnsafeText(
discover_interpreter(action=action,
interpreter_name=interpreter_name,
discovery_mode=s,
task_vars=task_vars))
# cache discovered interpreter
task_vars['ansible_facts'][discovered_interpreter_config] = s
action._connection.has_pipelining = False
else:
s = task_vars['ansible_facts'][discovered_interpreter_config]
# propagate discovered interpreter as fact
action._discovered_interpreter_key = discovered_interpreter_config
action._discovered_interpreter = s
action._finding_python_interpreter = False
return s
def test_discovery_interpreter_non_linux():
mock_action = MagicMock()
mock_action._low_level_execute_command.return_value = \
{'stdout': u'PLATFORM\nDarwin\nFOUND\n/usr/bin/python\nENDFOUND'}
actual = discover_interpreter(mock_action, 'python', 'auto_legacy', {'inventory_hostname': u'host-fóöbär'})
assert actual == u'/usr/bin/python'
assert len(mock_action.method_calls) == 2
assert mock_action.method_calls[1][0] == '_discovery_warnings.append'
assert u'Platform darwin on host host-fóöbär is using the discovered Python interpreter at /usr/bin/python, ' \
u'but future installation of another Python interpreter could change the meaning of that path' \
in mock_action.method_calls[1][1][0]
def test_discovery_interpreter_linux_auto_legacy():
res1 = u'PLATFORM\nLinux\nFOUND\n/usr/bin/python\n/usr/bin/python3.5\n/usr/bin/python3\nENDFOUND'
mock_action = MagicMock()
mock_action._low_level_execute_command.side_effect = [{'stdout': res1}, {'stdout': mock_ubuntu_platform_res}]
actual = discover_interpreter(mock_action, 'python', 'auto_legacy', {'inventory_hostname': u'host-fóöbär'})
assert actual == u'/usr/bin/python'
assert len(mock_action.method_calls) == 3
assert mock_action.method_calls[2][0] == '_discovery_warnings.append'
assert u'Distribution Ubuntu 16.04 on host host-fóöbär should use /usr/bin/python3, but is using /usr/bin/python' \
u' for backward compatibility' in mock_action.method_calls[2][1][0]
