* background threads writing to stdout/stderr can cause children to deadlock if a thread in the parent holds the internal lock on the BufferedWriter wrapper
* prevent writes to std handles during fork by monkeypatching stdout/stderr during display startup to require a mutex lock with fork(); this ensures no background threads can hold the lock during a fork operation
* add integration test that fails reliably on Linux without this fix
* Add find_spec and exec_module to RestrictedModuleLoader
* Fix getting new loader with correct path
Fix pep8 errors
* Use convert_ansible_name_to_absolute_paths instead of the loader path
* Apply suggestions from code review
* Fix type hints and test them in CI
* Fix error message for ansible.module_utils.basic if it's missing
Add mypy ignored missing imports for controller sanity tests
* Add mypy attr-defined ignore entries for python 3.8, 3.9, 3.10 for vendored six
Add mypy attr-defined ignore for python 2.7 in lib/ansible/utils/collection_loader/_collection_finder.py
* Just test controller python versions to simplify ignoring mypy errors
* Implement find_spec and exec_module to remove reliance on deprecated methods in the collection loader
ci_complete
* Move module execution to exec_module
Remove extra sys.modules handling
Use default module initialization by returning None from loader.create_module
Refactor
ci_complete
* Remove ansible-test's copy of the collection loader
ci_complete
* Fix metaclass for Python 2.x
ci_complete
* Fix Py2/Py3 syntax compatibility
* Refactor
ci_complete
* update collection_loader comments
ci_complete
* simplify find_module
ci_complete
* Fix Py2 compatibility - don't get loader from nonexistent spec
Remove unnecessary PY3 checking
* Refactor common code in load_module and exec_module
ci_complete
* tidy diff
ci_complete
* Include collection_loader in target paths for 'compile' sanity test
* add changelog
* Add "return None" instead of doing it implicitly
Remove get_filename
short-circuit exec_module if it's a redirect
ci_complete
* Overhaul ansible-test integration tests.
* ansible-test - Fix import test pyyaml usage.
* ansible-test - Remove unused import.
* ansible-test - Fix traceback when pip is unavailable.
* ansible-test - Fix typo in port forwarding message.
* ansible-test - Fix controller logic in requirements install.
* Fix unit tests in ansible-test integration test.
Unit tests are now run for available Python versions which
provide `virtualenv` (Python 2.x) or `venv` (Python 3.x).
* ansible-test - Create injector scripts at runtime.
* Set bootstrap.sh shebang at runtime.
* Remove shebang and execute bit from importer.
* Update shebang sanity test.
* Preserve line numbers.
Matt Clay