Add option to use location.pathname instead of URL

See GoogleChromeLabs/wasm-bindgen-rayon#36

protochess-engine-wasm/Makefile

@@ -14,7 +14,12 @@ pkg-parallel: src/*
 	RUSTC_BOOTSTRAP=1 RUSTFLAGS="-C target-feature=+atomics,+bulk-memory,+mutable-globals" \
 		wasm-pack build --target web --release --out-dir pkg-parallel \
 		-- . --features parallel -Z build-std=panic_abort,std
-
+
+# This is a hack to make wasm-bindgen-rayon work with Vite
+# Replace the string "new URL('./workerHelpers.js', import.meta.url)" with "location.pathname" in all files under pkg-parallel/snippets
+use-pathname:
+	find pkg-parallel/snippets -type f -exec sed -i 's/new URL(.*workerHelpers.js.*import.meta.url.*),/location.pathname,/g' {} +
+
 clean:
 	rm -rf pkg pkg-parallel
 	cargo clean