Use CI to build Python wheels on different platforms

.github/workflows/build-python-wheels.yml

@@ -0,0 +1,30 @@
+name: Build Python Wheels
+
+on: [push, pull_request]
+
+jobs:
+  build_wheels:
+    name: Build wheels on ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-20.04, windows-2019, macos-11]
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Generate Python bindings
+        run: ./scripts/uniffi_bindgen_generate_python.sh
+
+      - name: Build wheels
+        uses: pypa/[email protected]
+        env:
+          CIBW_ARCHS_MACOS: "x86_64 arm64 universal2"
+          CIBW_ARCHS_LINUX: "auto aarch64"
+          CIBW_BUILD_VERBOSITY: 1
+        with:
+          package-dir: ./bindings/python
+
+      - uses: actions/upload-artifact@v3
+        with:
+          path: ./wheelhouse/*.whl

bindings/python/setup.cfg

@@ -11,3 +11,4 @@ where = src
 ldk_node =
     *.so
     *.dylib
+    *.dll

scripts/uniffi_bindgen_generate_python.sh

@@ -4,8 +4,13 @@ UNIFFI_BINDGEN_BIN="cargo run --manifest-path bindings/uniffi-bindgen/Cargo.toml
 
 if [[ "$OSTYPE" == "linux-gnu"* ]]; then
 	DYNAMIC_LIB_PATH="./target/release-smaller/libldk_node.so"
-else
+elif [[ "$OSTYPE" == "darwin"* ]]; then
 	DYNAMIC_LIB_PATH="./target/release-smaller/libldk_node.dylib"
+elif [[ "$OSTYPE" == "windows"* ]]; then
+	DYNAMIC_LIB_PATH="./target/release-smaller/libldk_node.dll"
+else
+	echo "Unsupported platform!"
+	exit -1
 fi
 
 cargo build --profile release-smaller --features uniffi || exit 1