build: Universal macOS wheels supporting CPython 3.6 & 3.7 on Apple Silicon

Author: Stranger6667

.github/workflows/python-release.yml

@@ -7,7 +7,7 @@ on:
 
 jobs:
   wheels:
-    name: "Create wheels for ${{ matrix.BUILD.NAME }}"
+    name: "Wheels for ${{ matrix.BUILD.NAME }}"
     runs-on: ${{ matrix.BUILD.OS }}
     strategy:
       fail-fast: false
@@ -74,8 +74,48 @@ jobs:
           name: Distribution Artifacts
           path: wheelhouse/*.whl
 
+  wheels-macos-universal:
+    # `cibuildwheel` does not support building CPython 3.6/3.7 wheels for macOS ARM64
+    # This job build universal wheel that covers these versions.
+    # Non-universal wheels are also in place, because they have smaller size & will be used in Python 3.8+ installations
+    name: "Wheels for macOS universal2"
+    runs-on: macos-11
+    steps:
+      - uses: actions/checkout@v2
+      - name: Setup python
+        run: |
+          curl "$PYTHON_DOWNLOAD_URL" -o python.pkg
+          sudo installer -pkg python.pkg -target /
+        env:
+          PYTHON_DOWNLOAD_URL: 'https://www.python.org/ftp/python/3.10.0/python-3.10.0post2-macos11.pkg'
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: stable
+          override: true
+          default: true
+          target: aarch64-apple-darwin
+      - run: /Library/Frameworks/Python.framework/Versions/3.10/bin/python3 -m venv venv
+      - run: venv/bin/pip install -U pip wheel setuptools-rust
+      - run: mkdir wheelhouse
+      - name: Build the wheel
+        run: |
+          cd bindings/python && \
+          ../../venv/bin/python setup.py bdist_wheel --py-limited-api=cp36 && \
+          mv dist/css_inline*.whl ../../wheelhouse
+        env:
+          MACOSX_DEPLOYMENT_TARGET: '10.10'
+          ARCHFLAGS: '-arch x86_64 -arch arm64'
+          _PYTHON_HOST_PLATFORM: 'macosx-10.9-universal2'
+      - run: venv/bin/pip install -f wheelhouse --no-index css_inline
+      - run: find venv/lib/*/site-packages/ -name 'css_inline*.so' -exec vtool -show {} \;
+      - uses: actions/upload-artifact@v2
+        with:
+          name: Distribution Artifacts
+          path: wheelhouse/*.whl
+
   sdist:
-    name: Create sdist package
+    name: Sdist package
     runs-on: ubuntu-20.04
     steps:
       - uses: actions/checkout@v2
@@ -96,6 +136,7 @@ jobs:
   upload_to_pypi:
     needs:
     - wheels
+    - wheels-macos-universal
     - sdist
     name: Upload Artifacts to PyPi
     runs-on: ubuntu-20.04

bindings/python/CHANGELOG.md

@@ -2,6 +2,10 @@
 
 ## [Unreleased]
 
+### Added
+
+- Universal macOS wheels supporting CPython 3.6 & 3.7 on Apple Silicon.
+
 ## [0.8.0] - 2022-01-10
 
 ### Added

bindings/python/README.md

@@ -115,8 +115,8 @@ The following wheels are available:
 
 |                | manylinux<br/>musllinux<br/>x86_64 | manylinux<br/>musllinux<br/>aarch64 | macOS Intel | macOS ARM64 | Windows 64bit | Windows 32bit |
 |----------------|:----------------:|:-----------------:|:-----------:|:-----------:|:-------------:|:-------------:|
-| CPython 3.6    |        ✔         |         ✔         |      ✔️      |     N/A     |       ✔️       |       ✔️       |
-| CPython 3.7    |        ✔         |         ✔         |      ✔️      |     N/A     |       ✔️       |       ✔️       |
+| CPython 3.6    |        ✔         |         ✔         |      ✔️      |      ✔ ️     |       ✔️       |       ✔️       |
+| CPython 3.7    |        ✔         |         ✔         |      ✔️      |      ✔      |       ✔️       |       ✔️       |
 | CPython 3.8    |        ✔         |         ✔         |      ✔️      |      ✔️      |       ✔️       |       ✔️       |
 | CPython 3.9    |        ✔         |         ✔         |      ✔️      |      ✔️      |       ✔️       |       ✔️       |
 | CPython 3.10   |        ✔         |         ✔         |      ✔️      |      ✔️      |       ✔️       |       ✔️       |