ci: publish Python source distributions

.github/workflows/publish-python-sdist.yml

@@ -0,0 +1,67 @@
+name: Publish Python source distribution
+
+on:
+  release:
+    types: [published]
+
+permissions:
+  contents: read
+
+concurrency:
+  group: publish-python-sdist-${{ github.event.release.tag_name }}
+  cancel-in-progress: false
+
+jobs:
+  build:
+    name: Build source distribution
+    runs-on: ubuntu-latest
+    timeout-minutes: 15
+    steps:
+      - name: Check out the release commit
+        uses: actions/checkout@v7
+        with:
+          ref: ${{ github.event.release.tag_name }}
+
+      - name: Select the pinned Rust toolchain
+        run: rustup show active-toolchain
+
+      - name: Set up Python
+        uses: actions/setup-python@v6
+        with:
+          python-version: "3.x"
+
+      - name: Install maturin
+        run: python -m pip install --disable-pip-version-check "maturin>=1.9,<2"
+
+      - name: Build the source distribution
+        run: maturin sdist --out dist --manifest-path deepseek-recipe-python/Cargo.toml
+
+      - name: Upload the source distribution
+        uses: actions/upload-artifact@v4
+        with:
+          name: deepseek-recipe-sdist
+          path: dist/*.tar.gz
+          if-no-files-found: error
+          retention-days: 7
+
+  publish:
+    name: Publish to PyPI
+    needs: build
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+    environment:
+      name: pypi
+      url: https://pypi.org/p/deepseek-recipe
+    permissions:
+      id-token: write
+    steps:
+      - name: Download the source distribution
+        uses: actions/download-artifact@v5
+        with:
+          name: deepseek-recipe-sdist
+          path: dist
+
+      - name: Publish the source distribution
+        uses: pypa/gh-action-pypi-publish@release/v1
+        with:
+          packages-dir: dist/