unique artifact names and merge into one at the end

Author: jmalkin

.github/workflows/build_wheels.yml

@@ -6,6 +6,7 @@ on:
 env:
   BUILD_TYPE: Release
   MIN_CIBUILDWHEEL_VERSION: 2.16.2
+  PYTHON_VERSION: 3.11
 
 jobs:
   build_sdist:
@@ -17,7 +18,7 @@ jobs:
       - uses: actions/setup-python@v5
         name: Install Python
         with:
-          python-version: '3.x'
+          python-version: ${{ env.PYTHON_VERSION }}
 
       - name: Install build package
         run: python -m pip install build --user
@@ -27,6 +28,7 @@ jobs:
 
       - uses: actions/upload-artifact@v4
         with:
+          name: sdist
           path: dist/*.tar.gz
           compression-level: 0 # contents are already compressed
 
@@ -96,5 +98,19 @@ jobs:
 
       - uses: actions/upload-artifact@v4
         with:
+          name: wheel-${{ matrix.config.os }}-${{ matrix.config.cibw-arch }}
           path: ./dist/*.whl
           compression-level: 0 # contents are already compressed
+
+
+  aggregate_artifact:
+    name: Aggregate artifact
+    runs-on: ubuntu-latest
+    needs: [build_sdist, build_wheels]
+    steps:
+      - name: Merge Artifacts
+        uses: actions/upload-artifact/merge@v4
+        with:
+          name: python_wheels
+          compression-level: 0
+          delete-merged: true