importlib.machinery.ModuleSpec and find_spec() were introduced in Python 3.4
under PEP 451. They replace the find_module() API of PEP 302, which was
deprecated from Python 3.4. They were removed in Python 3.12 along with the
imp module.
This change adds support for the PEP 451 APIs. Mitogen should no longer import
imp on Python versions that support ModuleSpec. Tests have been added to cover
the new APIs.
CI jobs have been added to cover Python 3.x on macOS.
Refs #1033
Co-authored-by: Witold Baryluk <witold.baryluk@gmail.com>
Fixes
```
======================================================================
ERROR: setUpClass (ssh_test.BannerTest)
----------------------------------------------------------------------
Traceback (most recent call last):
File "/home/vsts/work/1/s/tests/testlib.py", line 625, in setUpClass
cls.dockerized_ssh = DockerizedSshDaemon(**daemon_args)
File "/home/vsts/work/1/s/tests/testlib.py", line 553, in __init__
self.start_container()
File "/home/vsts/work/1/s/tests/testlib.py", line 533, in start_container
self._get_container_port()
File "/home/vsts/work/1/s/tests/testlib.py", line 510, in _get_container_port
self.port = int(bport)
ValueError: invalid literal for int() with base 10: ':]:32770'
```
To do so the test suite allows a weak cryptographic alogorithm (SHA1) to be
used, principally for CentOS 6 targets. This can be removed if/when support
for older (legacy) targets is dropped.
Only the test suite enables this known weak alogorithm. Mitogen as-shipped
doesn't enable or disable algorithms.
A few changes are bundled in this
- Ansible 2.10.x and Mitogen 0.3.x are used to build nearly all images
(Ansile 2.3.x is retained for CentOS 5, because it uses Python 2.4).
- Tox is used to install/run Ansible, replacing build_docker_images.py
- A static inventory, identifying containers by name rather than ID.
- debian-test image is renamed to debian9-test
- debian9-test image is now based on debian:9
- centos6-test image is now based on moreati/centos6-vault
following the same scheme as centos5-test.
- Images are now uploaded to Amazon Elastic Container Registry (ECR).
See #809.
- Debian recommended packages aren't installed (e.g. build-essential)
- Python 2.x and Python 3.x are installed wherever available.
- Python Virtualenv is installed wherever available.
This relies on the previous commit resetting global variables.
Update clean_shutdown() to handle duplicate calls, due to tests
repeatedly installing it.
Alex Willmer