[libgpiod][PATCH v2 0/8] bindings: python: modernize C extensions

[Vincent Fazio <vfazio@gmail.com>]

This series performs some minor cleanup of the C extension modules and
migrates the module defintions to multi-phase intitialization (PEP 489).

Patches 1 & 2 avoid calling back into python to perform C level object
cleanup.

Patch 3 introduces no real functional change but simplifies the code to
get the same result.

Patch 4 applies suggestions from from a utility maintained by a CPython
core developer to help modernize macro/function usage.

Patch 5 conditionally compiles support for using a standard CPython
function over a backported version bundled within the C extension.

Patches 6-8 migrate the C extensions to use multi-phase initialization
as described in PEP 489 [0]. While not strictly necessary for enabling
free-threaded builds, it makes adding support more straighforward and
sets the stage for both PEP 793 [1] which soft-deprecates PyInit_* and
PEP 803 [2] which could simplify wheel builds.

Patches have been tested against the full matrix of supported versions:
  https://github.com/vfazio/libgpiod/actions/runs/24860932220

[0]: https://peps.python.org/pep-0489/
[1]: https://peps.python.org/pep-0793/
[2]: https://peps.python.org/pep-0803/

Signed-off-by: Vincent Fazio <vfazio@gmail.com>
---
Changes in v2:
- Dropped "bindings: python: use Py_RETURN_NONE in chip_get_line_name" (Bartosz)
- Adjusted patch 4 to simplify Py_None strong reference acquisition
- Updated link to passing pipeline
- Link to v1: https://lore.kernel.org/all/20260422012041.39933-1-vfazio@gmail.com/
---

Vincent Fazio (8):
  bindings: python: avoid PyObject_CallMethod during chip finalize
  bindings: python: avoid PyObject_CallMethod during request finalize
  bindings: python: simplify disallowing _ext.Request from being created
  bindings: python: use suggestions from upgrade_pythoncapi.py
  bindings: python: use PyImport_ImportModuleAttrString when available
  bindings: python: migrate the gpiod._ext module to multi-phase init
  bindings: python: tests: migrate the system module to multi-phase init
  bindings: python: tests: migrate the gpiosim module to multi-phase
    init

 bindings/python/gpiod/ext/chip.c     |  29 ++---
 bindings/python/gpiod/ext/common.c   |   5 +-
 bindings/python/gpiod/ext/internal.h |  10 +-
 bindings/python/gpiod/ext/module.c   |  68 ++++++------
 bindings/python/gpiod/ext/request.c  |  26 ++---
 bindings/python/tests/gpiosim/ext.c  | 153 +++++++++++++++++----------
 bindings/python/tests/system/ext.c   |   7 +-
 7 files changed, 171 insertions(+), 127 deletions(-)

-- 
2.43.0