Test cross compiling with cargo-zigbuild

Author: messense

.github/workflows/ci.yml

@@ -170,7 +170,7 @@ jobs:
         run: |
           cd examples/rust_with_cffi/
           python --version
-          pip install -U pip wheel setuptools
+          pip install -U wheel setuptools
           python setup.py bdist_wheel --py-limited-api=cp39
           ls -la dist/
         env:
@@ -188,7 +188,7 @@ jobs:
         shell: bash
         run: |
           cd examples/
-          pip install -U pip wheel setuptools
+          pip install -U wheel setuptools
           python --version
           pip install rust_with_cffi/dist/rust_with_cffi*.whl
           python -c "from rust_with_cffi import rust; assert rust.rust_func() == 14"
@@ -268,7 +268,56 @@ jobs:
           python -m pip install wheel
           python setup.py bdist_wheel --plat-name manylinux2014_aarch64
           ls -la dist/
-      - uses: uraimo/[email protected]
+      - uses: uraimo/[email protected]
+        name: Install built wheel
+        with:
+          arch: aarch64
+          distro: ubuntu20.04
+          dockerRunArgs: |
+            --volume "${PWD}/examples/namespace_package:/io"
+          install: |
+            apt-get update
+            apt-get install -y --no-install-recommends python3 python3-pip
+            pip3 install -U pip
+          run: |
+            pip3 install namespace_package --no-index --find-links /io/dist/ --force-reinstall
+            python3 -c "from namespace_package import rust; assert rust.rust_func() == 14"
+            python3 -c "from namespace_package import python; assert python.python_func() == 15"
+
+  test-zigbuild:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@master
+      - name: Setup python
+        uses: actions/setup-python@v2
+        with:
+          python-version: 3.8
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: stable
+          target: aarch64-unknown-linux-gnu
+          override: true
+      - name: Install cargo-zigbuild
+        run: |
+          cargo install cargo-zigbuild
+          python3 -m pip install ziglang
+      - name: Build package
+        run: pip install -e .
+      - name: Build wheel using cargo-zigbuild
+        shell: bash
+        env:
+          CARGO: cargo-zigbuild
+          CARGO_BUILD_TARGET: aarch64-unknown-linux-gnu
+          PYO3_CROSS_LIB_DIR: /opt/python/cp38-cp38/lib
+        run: |
+          mkdir -p $PYO3_CROSS_LIB_DIR
+          docker cp -L $(docker create --rm quay.io/pypa/manylinux2014_aarch64:latest):/opt/python/cp38-cp38 /opt/python
+          cd examples/namespace_package
+          python -m pip install wheel
+          python setup.py bdist_wheel --plat-name manylinux2014_aarch64
+          ls -la dist/
+      - uses: uraimo/[email protected]
         name: Install built wheel
         with:
           arch: aarch64