Build Python 3.13 wheels (#461)

.github/workflows/publish.yaml

@@ -59,6 +59,7 @@ jobs:
  CIBW_ARCHS_LINUX: auto aarch64
  CIBW_ARCHS_MACOS: auto universal2
  CIBW_BUILD_FRONTEND: build
+ CIBW_FREE_THREADED_SUPPORT: 1
  - uses: actions/upload-artifact@50769540e7f4bd5e21e526ee35c689e35e0d6874 # v4.4.0
  with:
  name: build-wheels-${{ matrix.os }}

.github/workflows/tests.yaml

@@ -22,6 +22,7 @@ jobs:
  matrix:
  include:
  - {python: '3.13'}
+ - {name: 'Free-threaded', python: '3.13', free-threaded: true}
  - {python: '3.12'}
  - {name: Windows, python: '3.12', os: windows-latest}
  - {name: Mac, python: '3.12', os: macos-latest}
@@ -32,13 +33,21 @@ jobs:
  steps:
  - uses: actions/checkout@d632683dd7b4114ad314bca15554477dd762a938 # v4.2.0
  - uses: actions/setup-python@f677139bbe7f9c59b41e40162b753c062f5d49a3 # v5.2.0
+ if: ${{ !matrix.free-threaded }}
  with:
  python-version: ${{ matrix.python }}
  allow-prereleases: true
  cache: pip
  cache-dependency-path: requirements*/*.txt
+ - uses: deadsnakes/action@e640ac8743173a67cca4d7d77cd837e514bf98e8 # v3.2.0
+ if: ${{ matrix.free-threaded }}
+ with:
+ python-version: ${{ matrix.python }}
+ nogil: true
  - run: pip install tox
- - run: tox run -e ${{ matrix.tox || format('py{0}', matrix.python) }}
+ - env:
+ PYTHON_GIL: ${{ matrix.free-threaded && '0' || '1' }}
+ run: tox run -e ${{ matrix.tox || format('py{0}', matrix.python) }}
  typing:
  runs-on: ubuntu-latest
  steps:

CHANGES.rst

@@ -3,6 +3,7 @@ Version 3.0.0
 
 Unreleased
 
+- Support Python 3.13 and its experimental free-threaded build. :pr:`461`
 - Drop support for Python 3.7 and 3.8.
 - Use modern packaging metadata with ``pyproject.toml`` instead of ``setup.cfg``.
  :pr:`348`

src/markupsafe/_speedups.c

@@ -190,5 +190,15 @@ static struct PyModuleDef module_definition = {
 PyMODINIT_FUNC
 PyInit__speedups(void)
 {
- return PyModule_Create(&module_definition);
+ PyObject *m = PyModule_Create(&module_definition);
+
+ if (m == NULL) {
+ return NULL;
+ }
+
+ #ifdef Py_GIL_DISABLED
+ PyUnstable_Module_SetGIL(m, Py_MOD_GIL_NOT_USED);
+ #endif
+
+ return m;
 }

tests/conftest.py

@@ -1,5 +1,6 @@
 from __future__ import annotations
 
+import sys
 import typing as t
 from types import ModuleType
 
@@ -14,6 +15,14 @@
  _speedups = None # type: ignore
 
 
+def pytest_report_header() -> list[str]:
+ """Return a list of strings to be displayed in the header of the report."""
+ if sys.version_info >= (3, 13):
+ return [f"Free-threaded: {not sys._is_gil_enabled()}"]
+
+ return []
+
+
 @pytest.fixture(
  scope="session",
  autouse=True,

tox.ini

@@ -9,6 +9,7 @@ skip_missing_interpreters = true
 
 [testenv]
 package = wheel
+pass_env = PYTHON_GIL
 constrain_package_deps = true
 use_frozen_constraints = true
 deps = -r requirements/tests.txt