CI: [build wheels]

.github/workflows/wheels.yml

@@ -0,0 +1,148 @@
+name: Build
+
+on:
+  push:
+    branches:
+      - master
+    tags:
+      - "*"
+  pull_request:
+    branches:
+      - master
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  # Extract metadata to allow for conditioning builds on commit messages
+  job_metadata:
+    runs-on: ubuntu-latest
+    outputs:
+      commit_message: ${{ steps.get_commit_message.outputs.commit_message }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+        with:
+          fetch-depth: 2
+      - name: Print head git commit message
+        id: get_commit_message
+        run: |
+          if [[ -z "$COMMIT_MSG" ]]; then
+            COMMIT_MSG=$(git show -s --format=%s $REF)
+          fi
+          echo commit_message=$COMMIT_MSG | tee -a $GITHUB_OUTPUT
+        env:
+          COMMIT_MSG: ${{ github.event.head_commit.message }}
+          REF: ${{ github.event.pull_request.head.sha }}
+
+  build-sdist:
+    name: Build sdist
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+      - name: Build sdist
+        run: pipx run build -s
+      - uses: actions/upload-artifact@v3
+        with:
+          name: sdist
+          path: ./dist/*.tar.gz
+
+  build-wheel:
+    # Runs on tags and commits with "[build wheels]" in the message
+    name: Build wheel for ${{ matrix.python }}-${{ matrix.buildplat[1] }}
+    needs: [job_metadata, build-sdist]
+    runs-on: ${{ matrix.buildplat[0] }}
+    if: github.event_name == 'push' && startsWith(github.ref, 'refs/tags/') || contains(needs.job_metadata.outputs.commit_message, '[build wheels]')
+    strategy:
+      fail-fast: false
+      matrix:
+        buildplat:
+          - [ubuntu-20.04, musllinux_x86_64]
+          - [macos-12, macosx_*]
+          - [windows-2019, win_amd64]
+        python: ["cp38", "cp39", "cp310", "cp311", "cp312"]
+        include:
+          # Manylinux builds are cheap, do all in one
+          - { buildplat: ["ubuntu-20.04", "manylinux_x86_64"], python: "*" }
+
+    steps:
+      - uses: actions/download-artifact@v3
+        with:
+          name: sdist
+          path: ./dist
+
+      - uses: actions/setup-python@v3
+
+      - name: Update pip/pipx
+        run: pip install --upgrade pip pipx
+
+      - name: Build wheel(s)
+        run: pipx run --spec "cibuildwheel>=2.15" cibuildwheel dist/*.tar.gz
+        env:
+          CIBW_BUILD: ${{ matrix.python }}-${{ matrix.buildplat[1] }}
+          CIBW_TEST_REQUIRES: pytest
+          CIBW_TEST_COMMAND: pytest --pyargs gradunwarp
+
+      - uses: actions/upload-artifact@v3
+        with:
+          name: ${{ matrix.python == '*' && 'all' || matrix.python }}-${{ startsWith(matrix.buildplat[1], 'macosx') && 'macosx' || matrix.buildplat[1] }}
+          path: ./wheelhouse/*.whl
+
+  test-sdist:
+    name: Test sdist
+    needs: [build-sdist]
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/download-artifact@v3
+        with:
+          name: sdist
+          path: ./dist
+      - uses: actions/setup-python@v4
+        with:
+          python-version: 3
+      - name: Display Python version
+        run: python -c "import sys; print(sys.version)"
+      - name: Install sdist
+        run: pip install dist/*.tar.gz
+      - run: python -c 'from gradunwarp.core.globals import VERSION; print(VERSION)'
+      - name: Install pytest
+        run: pip install pytest
+      - name: Run tests
+        run: pytest -v --pyargs gradunwarp
+
+  pre-publish:
+    runs-on: ubuntu-latest
+    needs: [test-sdist, build-wheel]
+    steps:
+      - uses: actions/download-artifact@v3
+        with:
+          path: dist/
+      - name: Check artifacts
+        run: ls -lR
+      - name: Consolidate and re-check
+        run: |
+          mv dist/*/*.{tar.gz,whl} dist
+          rmdir dist/*/
+          ls -lR
+      - run: pipx run twine check dist/*
+
+  publish:
+    runs-on: ubuntu-latest
+    environment: "Package deployment"
+    needs: [pre-publish]
+    if: github.event_name == 'push' && startsWith(github.ref, 'refs/tags/')
+    steps:
+      - uses: actions/download-artifact@v3
+        with:
+          path: dist/
+      - name: Consolidate artifacts
+        run: |
+          mv dist/*/*.{tar.gz,whl} dist
+          rmdir dist/*/
+      - uses: pypa/gh-action-pypi-publish@release/v1
+        with:
+          user: __token__
+          password: ${{ secrets.PYPI_API_TOKEN }}