Create release_language_client_python.yaml (#605)

.github/workflows/release_language_client_python.yaml

@@ -0,0 +1,71 @@
+name: Release language_client_python
+
+on:
+  workflow_dispatch: {}
+
+permissions:
+  contents: read
+  id-token: write
+
+jobs:
+  build:
+    strategy:
+      matrix:
+        _:
+          - runs_on: ubuntu-latest
+            target: x86_64
+            name: x86_64-unknown-linux-gnu
+
+          - runs_on: ubuntu-latest
+            target: aarch64
+            name: aarch64-unknown-linux-gnu
+
+          - runs_on: macos-latest
+            target: x86_64
+            name: x86_64-apple-darwin
+
+          - runs_on: macos-latest
+            target: aarch64
+            name: aarch64-apple-darwin
+
+          - runs_on: windows-latest
+            target: x64
+            name: x86_64-pc-windows-msvc
+
+    runs-on: ${{ matrix._.runs_on }}
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: "3.8"
+          architecture: ${{ matrix._.runs_on == 'windows-latest' && 'x64' || null }}
+
+      - name: Build wheels
+        uses: PyO3/maturin-action@v1
+        with:
+          target: ${{ matrix._.target }}
+          command: build
+          args: --release --out engine/language_client_python/dist --manifest-path engine/language_client_python/Cargo.toml
+          sccache: "true"
+          manylinux: ${{ matrix._.runs_on == 'ubuntu-latest' && 'auto' || null }}
+
+      - name: Upload wheels
+        uses: actions/upload-artifact@v4
+        with:
+          name: wheels-${{ matrix._.name }}
+          path: engine/language_client_python/dist
+
+  publish:
+    runs-on: ubuntu-latest
+    needs: [build]
+    if: startsWith(github.ref, 'refs/tags/release/')
+    environment: release
+
+    steps:
+      - uses: actions/download-artifact@v4
+      - run: mkdir dist && mv wheels-*/* dist
+
+      # authz is managed via OIDC configured at https://pypi.org/manage/project/baml-py/settings/publishing/
+      # it is pinned to this filename, so renaming this file is not safe!!: release_python_ffi.yaml
+      - name: Publish package to PyPI
+        uses: pypa/gh-action-pypi-publish@release/v1