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>
On OS X with case-insensitive filenames, resolving
'ansible.module_utils.facts.base.Hardware' finds
'ansible.module_utils.facts.hardware/__init__.py', because
module_finder's procedure is completely wrong for resolving child
modules. Patch over it for now since it otherwise works for Ansible.
* ansible: use unicode_literals everywhere since it only needs to be
compatible back to 2.6.
* compat/collections.py: delete this entirely and rip out the parts of
functools that require it.
* Introduce serializable Kwargs dict subclass that translates keys to
Unicode on instantiation.
* enable_debug_logging() must set _v/_vv globals.
* cStringIO does not exist in 3.x.
* Treat IOLogger and LogForwarder input as latin-1.
* Avoid ResourceWarnings in first stage by explicitly closing fps.
* Fix preamble_size.py syntax errors.
It's not simple without executing a module to determine whether the
above refers to a submodule of a package, or an object defined within a
module.
Therefore detect when resolution of a child module yields the same path
as the parent, and ignore the result.
This may come back to bite later, but in the meantime it avoids shipping
up to 12KiB of junk metadata for every single task invocation.
For detachment (aka. async), we must ensure the target has two types of
preloads completed (modules and module_utils files) before detaching.
Alex Willmer