[WIP] UniFFI Swift

livekit-uniffi/Package.swift

@@ -0,0 +1,36 @@
+// swift-tools-version:6.0
+// (Xcode16.0+)
+
+// For local testing, run ./swift.sh to generate the xcframework
+
+import PackageDescription
+
+let package = Package(
+    name: "LiveKitFFI",
+    platforms: [
+        .iOS(.v13),
+        .macOS(.v10_15),
+        .macCatalyst(.v14),
+        .visionOS(.v2),
+        .tvOS(.v17),
+    ],
+    products: [
+        .library(
+            name: "LiveKitFFI",
+            targets: ["LiveKitFFI"]
+        )
+    ],
+    targets: [
+        .binaryTarget(
+            name: "LiveKitFFIBinary",
+            path: "../target/LiveKitFFI.xcframework"
+        ),
+        .target(
+            name: "LiveKitFFI",
+            dependencies: ["LiveKitFFIBinary"],
+            path: "generated/swift",
+            sources: ["livekit_uniffi.swift"],
+            publicHeadersPath: "."
+        )
+    ]
+)

livekit-uniffi/swift.sh

@@ -0,0 +1,82 @@
+#!/bin/bash
+set -e
+
+UNIFFI_MODULE="livekit_uniffi"
+LIB_NAME="lib${UNIFFI_MODULE}"
+XCFRAMEWORK_NAME="LiveKitFFI"
+
+cargo build --release
+
+cargo run --bin uniffi-bindgen generate \
+    --library "../target/release/${LIB_NAME}.dylib" \
+    --language swift \
+    --out-dir "generated/swift"
+
+# Required for xcframework
+mv ./generated/swift/${UNIFFI_MODULE}FFI.modulemap ./generated/swift/module.modulemap
+
+RUSTUP_TARGETS=(
+    aarch64-apple-darwin
+    x86_64-apple-darwin
+    aarch64-apple-ios
+    aarch64-apple-ios-sim
+    x86_64-apple-ios
+    aarch64-apple-ios-macabi
+    x86_64-apple-ios-macabi
+)
+
+TIER3_TARGETS=(
+    aarch64-apple-tvos
+    aarch64-apple-visionos
+    aarch64-apple-tvos-sim
+    aarch64-apple-visionos-sim
+)
+
+for target in "${RUSTUP_TARGETS[@]}"; do
+    rustup target add "$target"
+done
+
+for target in "${RUSTUP_TARGETS[@]}"; do
+    cargo build --release --target "$target"
+done
+
+for target in "${TIER3_TARGETS[@]}"; do
+    cargo +nightly build -Zbuild-std=std,panic_abort --release --target="$target"
+done
+
+UNIVERSAL_BINARIES=(
+    "ios-simulator:aarch64-apple-ios-sim:x86_64-apple-ios"
+    "macos:aarch64-apple-darwin:x86_64-apple-darwin"
+    "ios-macabi:aarch64-apple-ios-macabi:x86_64-apple-ios-macabi"
+)
+
+for config in "${UNIVERSAL_BINARIES[@]}"; do
+    IFS=':' read -r output_dir arch1 arch2 <<< "$config"
+    mkdir -p "../target/${output_dir}/release"
+    lipo -create \
+        "../target/${arch1}/release/${LIB_NAME}.a" \
+        "../target/${arch2}/release/${LIB_NAME}.a" \
+        -output "../target/${output_dir}/release/${LIB_NAME}.a"
+done
+
+rm -rf "../target/${XCFRAMEWORK_NAME}.xcframework"
+
+XCFRAMEWORK_LIBS=(
+    "../target/aarch64-apple-ios/release/${LIB_NAME}.a"
+    "../target/ios-simulator/release/${LIB_NAME}.a"
+    "../target/macos/release/${LIB_NAME}.a"
+    "../target/ios-macabi/release/${LIB_NAME}.a"
+    "../target/aarch64-apple-tvos/release/${LIB_NAME}.a"
+    "../target/aarch64-apple-visionos/release/${LIB_NAME}.a"
+    "../target/aarch64-apple-tvos-sim/release/${LIB_NAME}.a"
+    "../target/aarch64-apple-visionos-sim/release/${LIB_NAME}.a"
+)
+
+XCFRAMEWORK_ARGS=()
+for lib in "${XCFRAMEWORK_LIBS[@]}"; do
+    XCFRAMEWORK_ARGS+=(-library "$lib" -headers ./generated/swift)
+done
+
+xcodebuild -create-xcframework \
+    "${XCFRAMEWORK_ARGS[@]}" \
+    -output "../target/${XCFRAMEWORK_NAME}.xcframework"