Adding cibuildwheel workflow to build and publish wheels (#361)

This should build wheels for most platforms, and also run a simple `load_model()` test to check whether the compiled wheels actually work. It'll also upload wheels from published GitHub releases to PyPI, but I'll still need to set that up.

.github/workflows/cibuildwheel.yml

@@ -0,0 +1,85 @@
+name: cibuildwheel build
+
+on:
+  workflow_dispatch:
+  push:
+    branches:
+      - master
+  release:
+    types:
+      - published
+
+jobs:
+  make_sdist:
+    name: Make SDist
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+      with:
+        submodules: recursive
+
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install setuptools wheel
+
+    - name: Build sdist
+      run: |
+        python setup.py sdist
+
+    - name: Upload artifact
+      uses: actions/upload-artifact@v3
+      with:
+        path: dist/*.*
+
+  build_wheels:
+    name: Build wheels on ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-22.04, windows-2022, macOS-11]
+
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          submodules: recursive
+
+      # Used to host cibuildwheel
+      - uses: actions/setup-python@v3
+
+      - name: Use cmake
+        run: cmake --version
+
+      - name: Install cibuildwheel
+        run: python -m pip install cibuildwheel==2.15.0
+
+      - name: Build wheels
+        run: python -m cibuildwheel --output-dir wheelhouse
+        # to supply options, put them in 'env', like:
+        env:
+          MACOSX_DEPLOYMENT_TARGET: 10.15
+          CIBW_ARCHS_MACOS: "x86_64 universal2 arm64"
+          CIBW_SKIP: pp* *i686
+          CIBW_TEST_REQUIRES: pytest numpy
+          CIBW_TEST_COMMAND: pytest {package}/tests
+          CIBW_TEST_SKIP: "*-macosx_arm64 *-macosx_universal2:arm64"
+
+      - uses: actions/upload-artifact@v3
+        with:
+          path: ./wheelhouse/*.whl
+
+  upload_all:
+    needs: [build_wheels, make_sdist]
+    environment: pypi
+    permissions:
+      id-token: write
+    runs-on: ubuntu-latest
+    if: github.event_name == 'release' && github.event.action == 'published'
+    steps:
+    - uses: actions/download-artifact@v3
+      with:
+        name: artifact
+        path: dist
+
+    - uses: pypa/gh-action-pypi-publish@release/v1

setup.py

@@ -44,6 +44,10 @@ def build_extension(self, ext):
         build_args = ['--config', cfg]
 
         if platform.system() == "Windows":
+            if platform.architecture()[0] == '32bit':
+                cmake_args += ['-A', 'Win32']
+            else:
+                cmake_args += ['-A', 'x64']
             cmake_args += ['-G', 'Visual Studio 17 2022']
             cmake_args += ['-DCMAKE_LIBRARY_OUTPUT_DIRECTORY_{}={}'.format(cfg.upper(), extdir)]
             build_args += ['--', '/m']

tests/test_load_model.py

@@ -0,0 +1,8 @@
+import pytest
+import eos
+import numpy as np
+from pathlib import Path
+
+def test_load_model():
+    model = eos.morphablemodel.load_model(str(Path(__file__).resolve().parent.parent / 'share' / 'sfm_shape_3448.bin'))
+    assert model is not None