Add script to build .pkg file for macos

package_macos.sh

@@ -0,0 +1,33 @@
+#!/bin/bash
+
+set -euxo pipefail
+
+umask 022
+
+SRC_DIR="${0%/*}"
+BUILD_ARM="$(mktemp -d -t conflict-set-arm)"
+BUILD_X86="$(mktemp -d -t conflict-set-x86)"
+
+cmake_args=(-DCMAKE_CXX_FLAGS=-DNVALGRIND -DCPACK_PACKAGING_INSTALL_PREFIX=/usr/local)
+
+cmake -S"$SRC_DIR" -B"$BUILD_ARM" -DCMAKE_OSX_ARCHITECTURES=arm64 "${cmake_args[@]}"
+cmake --build "$BUILD_ARM" --target conflict-set --target conflict-set-static
+
+cmake -S"$SRC_DIR" -B"$BUILD_X86" -DCMAKE_OSX_ARCHITECTURES=x86_64 "${cmake_args[@]}"
+cmake --build "$BUILD_X86" --target conflict-set --target conflict-set-static
+
+VERSION="$(cat "$BUILD_ARM/version.txt")"
+
+lipo -create "$BUILD_ARM/radix_tree/libconflict-set.$VERSION.dylib" "$BUILD_X86/radix_tree/libconflict-set.$VERSION.dylib" -output "libconflict-set.$VERSION.dylib.tmp"
+lipo -create "$BUILD_ARM"/libconflict-set-static.a "$BUILD_X86"/libconflict-set-static.a -output libconflict-set-static.a.tmp
+
+mv "libconflict-set.$VERSION.dylib.tmp" "$BUILD_ARM/radix_tree/libconflict-set.$VERSION.dylib"
+mv libconflict-set-static.a.tmp "$BUILD_ARM/libconflict-set-static.a"
+
+pushd "$BUILD_ARM"
+cpack -G productbuild
+popd
+
+mv "$BUILD_ARM/conflict-set-$VERSION-Darwin.pkg" .
+
+rm -rf  "$BUILD_ARM" "$BUILD_X86"