#!/bin/sh
# Run an Emscripten-generated helper under Node during a cross build.
# Node's fetch rejects absolute filesystem paths; generated Emscripten loaders
# otherwise have a correct synchronous filesystem fallback, so adapt fetch to
# a minimal Response for local .wasm files.
set -eu
script="$1"
shift
exec node -e '
const fs = require("fs");
const originalFetch = global.fetch;
global.fetch = async (input, init) => {
  const value = typeof input === "string" ? input : input && input.url;
  if (typeof value === "string" && value.startsWith("/")) {
    const data = await fs.promises.readFile(value);
    return new Response(data, { status: 200 });
  }
  return originalFetch(input, init);
};
const moduleObject = require(process.argv[1]);
// Emscripten starts instantiateWasm asynchronously. Keep the helper process
// alive until its main function has actually run, otherwise Node can exit
// after the fetch promise while the generated file is still pending.
let ticks = 0;
const waitForMain = setInterval(() => {
  if (moduleObject.calledRun) {
    const name = require("path").basename(process.argv[1]);
    const entry = name === "vtkH5detect.js" ? moduleObject._h5detect_entry :
      name === "vtkH5make_libsettings.js" ? moduleObject._h5make_libsettings_entry : null;
    if (entry) {
      try { entry(); } catch (error) { if (!error || error.name !== "ExitStatus") throw error; }
    }
    clearInterval(waitForMain);
  } else if (++ticks > 600) clearInterval(waitForMain);
}, 10);
' "$script" "$@"