Add macOS static AvaloniaNative experiment

scripts/build-macos-avalonia-native-static.sh

@@ -0,0 +1,54 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+RID="${RID:-osx-arm64}"
+AVALONIA_VERSION="${AVALONIA_VERSION:-11.3.14}"
+WORK_DIR="${WORK_DIR:-$PWD/External/NativeStatic/.work}"
+OUTPUT_DIR="${OUTPUT_DIR:-$PWD/External/NativeStatic/$RID/native}"
+BUILD_JOBS="${BUILD_JOBS:-$(sysctl -n hw.ncpu 2>/dev/null || echo 4)}"
+
+case "$RID" in
+  osx-arm64) ARCH="arm64" ;;
+  osx-x64) ARCH="x86_64" ;;
+  *) echo "Unsupported RID: $RID" >&2; exit 2 ;;
+esac
+
+mkdir -p "$WORK_DIR" "$OUTPUT_DIR"
+
+src="$WORK_DIR/Avalonia-$AVALONIA_VERSION"
+if [[ ! -d "$src/.git" ]]; then
+  rm -rf "$src"
+  git clone --depth 1 --branch "$AVALONIA_VERSION" https://github.com/AvaloniaUI/Avalonia.git "$src"
+fi
+
+project="$src/native/Avalonia.Native/src/OSX/Avalonia.Native.OSX.xcodeproj"
+build_dir="$WORK_DIR/avalonia-native-$RID"
+rm -rf "$build_dir"
+mkdir -p "$build_dir"
+
+xcodebuild \
+  -project "$project" \
+  -target Avalonia.Native.OSX \
+  -configuration Release \
+  -sdk macosx \
+  -arch "$ARCH" \
+  CONFIGURATION_BUILD_DIR="$build_dir" \
+  ONLY_ACTIVE_ARCH=NO \
+  CODE_SIGNING_ALLOWED=NO \
+  MACH_O_TYPE=staticlib \
+  EXECUTABLE_PREFIX=lib \
+  EXECUTABLE_EXTENSION=a \
+  PRODUCT_NAME=AvaloniaNative \
+  CLANG_ENABLE_MODULES=YES \
+  GCC_GENERATE_DEBUGGING_SYMBOLS=NO \
+  -jobs "$BUILD_JOBS"
+
+candidate="$(find "$build_dir" -maxdepth 2 -type f -name 'libAvaloniaNative.a' -print -quit)"
+if [[ -z "$candidate" ]]; then
+  echo "Failed to find libAvaloniaNative.a in $build_dir" >&2
+  find "$build_dir" -maxdepth 3 -type f -print >&2
+  exit 1
+fi
+
+cp "$candidate" "$OUTPUT_DIR/libAvaloniaNative.a"
+echo "Wrote $OUTPUT_DIR/libAvaloniaNative.a"