Use uvx to run cibuildwheel on RISC-V (#118)

* Use uvx to run cibuildwheel on RISC-V

Oldest uvx mistake ever

Cache bust on arch

* Choose Python explicitly

* Simplify os/arch handling

* Add name

* Use official

* Cache only for local builds

* Zizmor is not happy

.github/workflows/wheels.yml

@@ -19,7 +19,7 @@ permissions: {}
 
 jobs:
   wheels:
-    name: Building for ${{ matrix.os }}${{ matrix.name_suffix || '' }}
+    name: Building for ${{ matrix.os }}
     runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: false
@@ -31,8 +31,6 @@ jobs:
           - os: windows-11-arm
           - os: macOS-14
           - os: ubuntu-24.04-riscv
-            cibw_archs: "riscv64"
-            name_suffix: "-riscv64"
 
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
@@ -43,30 +41,24 @@ jobs:
           persist-credentials: false
 
       - uses: astral-sh/setup-uv@37802adc94f370d6bfd71619e3f0bf239e1f3b78 # v7.6.0
-        if: matrix.cibw_archs != 'riscv64'
         with:
-          enable-cache: false
+          enable-cache: "false"
 
       # Use the GitHub Action for all platforms except riscv64
-      - uses: pypa/cibuildwheel@ee02a1537ce3071a004a6b08c41e72f0fdc42d9a # v3.4.0
-        if: matrix.cibw_archs != 'riscv64'
+      - name: Build wheels on ${{ matrix.os }}
+        uses: pypa/cibuildwheel@ee02a1537ce3071a004a6b08c41e72f0fdc42d9a # v3.4.0
+        if: ${{ !endsWith(matrix.os, 'riscv') }}
         env:
-          CIBW_ARCHS: ${{ matrix.cibw_archs || 'auto' }}
+          CIBW_ARCHS: auto
 
-      # On riscv64 native runners, run cibuildwheel via pipx to avoid
-      # the GitHub Action's setup-python call (not available for riscv64)
-      - name: Build wheels (riscv64 native)
-        if: matrix.cibw_archs == 'riscv64'
-        run: |
-          export PATH="$(ls -d /opt/python-3.1*/bin 2>/dev/null | sort -V | tail -1):$PATH"
-          python3 --version
-          python3 -m pip install pipx
-          pipx run cibuildwheel --output-dir wheelhouse
+      - name: Build wheels on ${{ matrix.os }}
+        run: uvx --python 3.14 cibuildwheel --output-dir wheelhouse
+        if: ${{ endsWith(matrix.os, 'riscv') }}
         env:
           CIBW_ARCHS: riscv64
 
       - uses: actions/upload-artifact@bbbca2ddaa5d8feaa63e36b76fdaad77386f024f # v7.0.0
         with:
-          name: wheels-${{ matrix.os }}${{ matrix.name_suffix || '' }}-${{ strategy.job-index }}
+          name: wheels-${{ matrix.os }}-${{ strategy.job-index }}
           path: ./wheelhouse/*.whl
 ...