WHL: bump cibuildwheel to 3.1.1, start testing wheels on CPython 3.14

Author: neutrinoceros

.github/workflows/wheels.yaml

@@ -11,6 +11,7 @@ on:
     paths:
       - '.github/workflows/wheels.yaml'
       - MANIFEST.in
+      - pyproject.toml
   workflow_dispatch:
 
 
@@ -48,7 +49,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Build wheels for CPython
-        uses: pypa/cibuildwheel@v3.0.0
+        uses: pypa/cibuildwheel@v3.1.1
         with:
           output-dir: dist
         env:

pyproject.toml

@@ -31,6 +31,7 @@ classifiers = [
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
     "Programming Language :: Python :: 3.13",
+    "Programming Language :: Python :: 3.14",
     "Topic :: Scientific/Engineering :: Astronomy",
     "Topic :: Scientific/Engineering :: Physics",
     "Topic :: Scientific/Engineering :: Visualization",
@@ -459,8 +460,18 @@ exclude = "(test_*|lodgeit)"
 
 [tool.cibuildwheel]
 build-verbosity = 1
+skip = ["cp314t-*"]
 test-skip = "*-musllinux*"
 test-extras = "test"
 test-command = [
     "python -m pytest -c {project}/pyproject.toml --rootdir . --color=yes --pyargs yt -ra",
 ]
+
+[[tool.cibuildwheel.overrides]]
+# Install nightly wheels for matplotlib, not yet available on PyPI.
+select = "cp314*"
+before-test = [
+    # numpy and contourpy, both dependencies to matplotlib, can safely be installed from PyPI
+    "python -m pip install numpy contourpy",
+    "python -m pip install --pre --extra-index-url https://pypi.anaconda.org/scientific-python-nightly-wheels/simple matplotlib --only-binary matplotlib",
+]