Add release job to publish macOS arm64 binaries (#246)

* Add release job to publish macOS arm64 binaries

With the recent release of cibuildwheel 1.9.0 support for building arm64
binaries on macOS was added. This enables us to build release binaries
for this new platform. However, these binaries will be cross-compiled
and not tested since there are no CI resources with the platform
available. This commit adds a new release wheel job to build a aarch64
binary and publish an arm64 wheel for macOS. This will enable users who
have an arm64 mac to run retworkx without having to either build from
source or run under rosetta 2.

Fixes #231

* DNM: Testing the wheel builds

* Install aarch64-apple-darwin target

* Random guess at cross lib dir

* Update PYO3_CROSS_LIB path

* Revert "DNM: Testing the wheel builds"

Tested the wheel builds work and @nonhermitian confirmed the built
wheels worked on an arm64 mac locally.

This reverts commit 2a6ff1f.

* Install twine in arm64 wheel job

* Add release notes

.github/workflows/wheels.yml

@@ -44,7 +44,7 @@ jobs:
           toolchain: stable
       - name: Install cibuildwheel
         run: |
-          python -m pip install cibuildwheel==1.6.3 twine
+          python -m pip install cibuildwheel==1.9.0 twine
       - name: Build wheels
         run: |
           python -m cibuildwheel --output-dir wheelhouse
@@ -57,7 +57,6 @@ jobs:
           CIBW_SKIP: cp27-* cp34-* cp35-* pp* *win32
           CIBW_BEFORE_BUILD: pip install -U setuptools-rust
           CIBW_TEST_COMMAND: python -m unittest discover {project}/tests
-
       - uses: actions/upload-artifact@v2
         with:
           path: ./wheelhouse/*.whl
@@ -66,6 +65,33 @@ jobs:
         env:
           TWINE_PASSWORD: ${{ secrets.TWINE_PASSWORD }}
           TWINE_USERNAME: retworkx-ci
+  build-mac-arm-wheels:
+    name: Build wheels on macos for arm
+    runs-on: macos-10.15
+    steps:
+      - uses: actions/checkout@v2
+      - name: Build wheels
+        uses: joerick/[email protected]
+        env:
+          CIBW_BEFORE_ALL: rustup target add aarch64-apple-darwin
+          CIBW_ARCHS_MACOS: arm64
+          CIBW_BEFORE_BUILD: pip install -U setuptools-rust
+          CIBW_ENVIRONMENT: CARGO_BUILD_TARGET="aarch64-apple-darwin" PYO3_CROSS_LIB_DIR="/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9"
+      - uses: actions/upload-artifact@v2
+        with:
+          path: ./wheelhouse/*.whl
+      - uses: actions/setup-python@v2
+        name: Install Python
+        with:
+          python-version: '3.8'
+      - name: Install cibuildwheel
+        run: |
+          python -m pip install twine
+      - name: Upload to PyPI
+        run: twine upload ./wheelhouse/*.whl
+        env:
+          TWINE_PASSWORD: ${{ secrets.TWINE_PASSWORD }}
+          TWINE_USERNAME: retworkx-ci
   build-win32-wheels:
     name: Build wheels on win32
     runs-on: windows-latest
@@ -85,7 +111,7 @@ jobs:
         run: rustup default stable-i686-pc-windows-msvc
       - name: Install cibuildwheel
         run: |
-          python -m pip install cibuildwheel==1.6.3 twine
+          python -m pip install cibuildwheel==1.9.0 twine
       - name: Build wheels
         run: |
           python -m cibuildwheel --output-dir wheelhouse

releasenotes/notes/arm64-mac-d45deda145e37b8f.yaml

@@ -0,0 +1,6 @@
+---
+features:
+  - |
+    Starting with this release wheels will be published for macOS arm64. Only
+    Python 3.9 is supported at first, because it is the only version of
+    Python with native support for arm64 macOS.