Enable continuous releases for multi-backend-refactor branch

.github/workflows/python-package.yml

@@ -197,6 +197,56 @@ jobs:
           path: dist/bitsandbytes-*.whl
           retention-days: 7
 
+  upload-pre-release-wheels:
+    name: Create release and upload artifacts
+    runs-on: ubuntu-latest
+    if: github.ref_name == 'multi-backend-refactor'
+    permissions:
+      contents: write
+    needs:
+      - build-wheels
+    steps:
+      - name: Download artifacts to tmp directory
+        uses: actions/download-artifact@v4
+        with:
+          path: tmp/
+          pattern: "bdist_wheel_*"
+          merge-multiple: true
+      - name: Inspect tmp directory after downloading artifacts
+        run: ls -alFR tmp/
+      - name: Move and rename wheel files
+        run: |
+          mkdir -p wheels/
+          find tmp/ -type f -name '*.whl' -print0 | while IFS= read -r -d '' wheel; do
+            wheel_filename=$(basename "$wheel")
+            if [[ $wheel_filename == *linux*x86_64* ]]; then
+              mv "$wheel" wheels/bnb-linux-x86_64.whl
+            elif [[ $wheel_filename == *linux*aarch64* ]]; then
+              mv "$wheel" wheels/bnb-linux-aarch64.whl
+            elif [[ $wheel_filename == *macosx*x86_64* ]]; then
+              mv "$wheel" wheels/bnb-macos-x86_64.whl
+            elif [[ $wheel_filename == *macosx*arm64* ]]; then
+              mv "$wheel" wheels/bnb-macos-arm64.whl
+            elif [[ $wheel_filename == *win*amd64* ]]; then
+              mv "$wheel" wheels/bnb-windows-x86_64.whl
+            else
+              echo "Unknown wheel format: $wheel_filename"
+              exit 1
+            fi
+          done
+      - name: Inspect wheels directory after renaming files
+        run: ls -alFR wheels/
+      - name: Create release and upload artifacts
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          GITHUB_CONTINUOUS_RELEASE_NAME: Multi-Backend Preview
+          GITHUB_CONTINUOUS_RELEASE_TYPE: prerelease
+          GITHUB_CONTINUOUS_RELEASE_TAG: continuous-release_preview
+        run: |
+          wget -q https://github.com/TheAssassin/pyuploadtool/releases/download/continuous/pyuploadtool-x86_64.AppImage
+          chmod +x pyuploadtool-x86_64.AppImage
+          ./pyuploadtool-x86_64.AppImage --appimage-extract-and-run wheels/*.whl
+
   audit-wheels:
     needs: build-wheels
     runs-on: ubuntu-latest