🛩️ Use aarch64 Linux runners from BuildJet (#81)

* 🛩️ Try buildjet aarch64 Linux runners
* 🧪 Test Linux aarch64 run [buildjet]
* Use `cibuildwheel` with BuildJet runners

.github/workflows/ci.yml

@@ -13,6 +13,8 @@ concurrency:
 
 env:
   FORCE_COLOR: 3
+  CIBW_BUILD_VERBOSITY: 2
+  CIBW_BUILD_FRONTEND: "pip"  # use pip for now, not build – missing buildDate otherwise
 
 jobs:
   style:
@@ -76,6 +78,34 @@ jobs:
       - name: Test entry points for package
         run: nox -s venv
 
+  build_wheels_linux_aarch64:
+    needs: [style]
+    name: linux-aarch64-buildjet-python-3.12
+    runs-on: buildjet-2vcpu-ubuntu-2204-arm
+    steps:
+      - uses: actions/checkout@9bb56186c3b09b4f86b1c65136769dd318469633  # v4.1.2
+      - uses: buildjet/setup-python@v5
+      - uses: buildjet/setup-go@0c52d547c9bc32b1aa3301fd7a9cb496313a4491  # v5.0.0
+        with:
+          go-version: '1.22.2'
+          cache: false
+          check-latest: true
+
+      - name: Build binary distribution (wheel) on Linux (aarch64)
+        run: |
+          python -m pip install cibuildwheel
+          python -m cibuildwheel --output-dir wheelhouse
+        env:
+          CIBW_BUILD: "cp312-*"
+          CIBW_ARCHS_LINUX: aarch64
+          CIBW_BEFORE_ALL_LINUX: bash scripts/ci/tools/linux/install_go.sh
+          CIBW_ENVIRONMENT_LINUX: PATH=$PATH:$HOME/go_installed/go/bin
+          CIBW_SKIP: "pp* *musllinux*"
+          CIBW_MANYLINUX_AARCH64_IMAGE: "manylinux_2_28"
+          CIBW_TEST_COMMAND: >
+            hugo version
+            hugo env --logLevel debug
+
   experimental:
     needs: [style]
     name: ${{ matrix.runs-on }}-${{ matrix.architecture }}-python-${{ matrix.python-version }}