Building sdist on github ci

.github/workflows/wheels.yml

@@ -324,9 +324,34 @@ jobs:
           path: ./wheelhouse/*.whl
           name: artifact-${{ matrix.os }}-${{ matrix.platform_id }}-python-${{ matrix.python }}
 
+  build_sdist:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          submodules: true
+
+      - uses: actions/setup-python@v5
+        name: Install Python host for sdist
+        with:
+          python-version: '3.9'
+
+      - name: Create sdist
+        run: |
+          python -m pip install --upgrade pip
+          pip install setuptool
+          python setup.py sdist
+
+      - uses: actions/upload-artifact@v4
+        with:
+          path: ./dist/*.tar.gz
+          name: artifact-${{ matrix.os }}-${{ matrix.platform_id }}-python-${{ matrix.python }}
+
   merge:
     runs-on: ubuntu-latest
-    needs: build_wheels
+    needs: 
+      - build_wheels
+      - build_sdist
     steps:
       - name: Merge Artifacts
         uses: actions/upload-artifact/merge@v4