Allow stable ABI builds and enable for binary wheels

.github/workflows/build-wheels.yml

@@ -40,7 +40,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-latest, macos-13, macos-14, windows-2022]
+        os: [ubuntu-latest, macos-14, macos-15, windows-2025]
 
     steps:
       - uses: actions/checkout@v5

pyproject.toml

@@ -34,29 +34,34 @@ testpaths = ["test"]
 wheel.packages = ["python/basix"]
 
 [tool.cibuildwheel]
+build-frontend = {name = "pip", args = ["--config-settings=wheel.py-api=cp312"] }
 build = [
-    "cp{39,310,311,312}-manylinux_x86_64",
-    "cp{39,310,311,312}-manylinux_aarch64",
-    "cp{39,310,311,312}-macosx_x86_64",
-    "cp{39,310,311,312}-macosx_arm64",
-    "cp{39,310,311,312}-win_amd64",
+    "cp3{9,10,11,12,13}-manylinux_x86_64",
+    "cp3{9,10,11,12,13}-manylinux_aarch64",
+    "cp3{9,10,11,12,13}-macosx_x86_64",
+    "cp3{9,10,11,12,13}-macosx_arm64",
+    "cp3{9,10,11,12,13}-win_amd64",
 ]
 test-command = [
     "cmake -G Ninja -DPython3_EXECUTABLE=$(which python) -B build-dir -S {project}/test/test_cmake",
     "cmake --build build-dir/",
     "build-dir/a.out",
-    "python -m pytest -v -n auto --durations 20 {project}/test/",
+    "python -m pytest -n auto --durations 20 {project}/test/",
 ]
 test-requires = ["pytest-xdist"]
 test-extras = ["test"]
 test-skip = "*-*linux_aarch64"
-manylinux-x86_64-image = "quay.io/pypa/manylinux_2_28_x86_64:2024-09-16-ab73a4b"
-manylinux-aarch64-image = "quay.io/pypa/manylinux_2_28_aarch64:2024-09-16-ab73a4b"
+manylinux-x86_64-image = "quay.io/pypa/manylinux_2_28_x86_64:2025.08.29-1"
+manylinux-aarch64-image = "quay.io/pypa/manylinux_2_28_aarch64:2025.08.29-1"
 
 [tool.cibuildwheel.windows]
-build-frontend = {name = "pip", args = ["--config-settings=cmake.args=-DINSTALL_RUNTIME_DEPENDENCIES=ON", "--config-settings=cmake.args=-DCMAKE_TOOLCHAIN_FILE=C:/vcpkg/scripts/buildsystems/vcpkg.cmake"] }
+build-frontend = {name = "pip", args = ["--config-settings=wheel.py-api=cp312", "--config-settings=cmake.args=-DINSTALL_RUNTIME_DEPENDENCIES=ON", "--config-settings=cmake.args=-DCMAKE_TOOLCHAIN_FILE=C:/vcpkg/scripts/buildsystems/vcpkg.cmake"] }
 test-command = [
-    "python -m pytest -v -n auto --durations 20 {project}/test/",
+    "python -m pytest -n auto --durations 20 {project}/test/",
+]
+repair-wheel-command = [
+  "copy {wheel} {dest_dir}",
+  "pipx run abi3audit --strict --report {wheel}",
 ]
 
 [tool.cibuildwheel.linux]
@@ -69,7 +74,11 @@ test-command = [
     "cmake -G Ninja -DPython3_EXECUTABLE=$(which python) -B build-dir -S {project}/test/test_cmake",
     "cmake --build build-dir/",
     "build-dir/a.out",
-    "python -m pytest -v -n auto --durations 20 {project}/test/",
+    "python -m pytest -n auto --durations 20 {project}/test/",
+]
+repair-wheel-command = [
+  "auditwheel repair -w {dest_dir} {wheel}",
+  "pipx run abi3audit --strict --report {wheel}",
 ]
 
 [tool.cibuildwheel.macos]
@@ -83,7 +92,11 @@ test-command = [
     "cmake -G Ninja -DPython3_EXECUTABLE=$(which python) -B build-dir -S {project}/test/test_cmake",
     "cmake --build build-dir/",
     "build-dir/a.out",
-    "python -m pytest -v -n auto --durations 20 {project}/test/",
+    "python -m pytest -n auto --durations 20 {project}/test/",
+]
+repair-wheel-command = [
+  "delocate-wheel --require-archs {delocate_archs} -w {dest_dir} -v {wheel}",
+  "pipx run abi3audit --strict --report {wheel}",
 ]
 
 [tool.mypy]

python/CMakeLists.txt

@@ -20,7 +20,7 @@ else()
   find_package(Basix REQUIRED)
 endif()
 
-find_package(Python COMPONENTS Interpreter Development.Module REQUIRED)
+find_package(Python COMPONENTS Interpreter Development.Module ${SKBUILD_SABI_COMPONENT} REQUIRED)
 
 # Options
 include(FeatureSummary)
@@ -38,7 +38,10 @@ list(APPEND CMAKE_PREFIX_PATH "${NB_DIR}")
 find_package(nanobind CONFIG REQUIRED)
 
 # Create the binding library
-nanobind_add_module(_basixcpp NB_SUPPRESS_WARNINGS wrapper.cpp)
+if(NOT "${SKBUILD_SABI_VERSION}" STREQUAL "")
+  set(NANOBIND_SABI "STABLE_ABI")
+endif()
+nanobind_add_module(_basixcpp NB_SUPPRESS_WARNINGS ${NANOBIND_SABI} wrapper.cpp)
 target_compile_definitions(_basixcpp PRIVATE cxx_std_20)
 
 if(ENABLE_CLANG_TIDY)