pkg.data?.type === 'module' || getOptionValue('--experimental-default-type') === 'module';
}

/**
 * Run the main entry point through the ESM Loader.
 * @param {string} mainPath - Absolute path for the main entry point
 */
function runMainESM(mainPath) {
  const { loadESM } = require('internal/process/esm_loader');
  const { pathToFileURL } = require('internal/url');
  const main = pathToFileURL(mainPath).href;

  handleMainPromise(loadESM((esmLoader) => {
    return esmLoader.import(main, undefined, { __proto__: null });
  }));
}

/**
 * Handle process exit events around the main entry point promise.
 * @param {Promise} promise - Main entry point promise
 */
async function handleMainPromise(promise) {
  const {
    handleProcessExit,
  } = require('internal/modules/esm/handle_process_exit');
  process.on('exit', handleProcessExit);
  try {
    return await promise;
  } finally {
    process.off('exit', handleProcessExit);
  }
}

/**
 * Parse the CLI main entry point string and run it.
 * For backwards compatibility, we have to run a bunch of monkey-patchable code that belongs to the CJS loader (exposed
 * by `require('module')`) even when the entry point is ESM.
 * This monkey-patchable code is bypassed under `--experimental-default-type=module`.
 * Because of backwards compatibility, this function is exposed publicly via `import { runMain } from 'node:module'`.
 * @param {string} main - First positional CLI argument, such as `'entry.js'` from `node entry.js`
 */
function executeUserEntryPoint(main = process.argv[1]) {
  const resolvedMain = resolveMainPath(main);
  const useESMLoader = shouldUseESMLoader(resolvedMain);
  if (useESMLoader) {
    runMainESM(resolvedMain || main);
  } else {
    // Module._load is the monkey-patchable CJS module loader.
    const { Module } = require('internal/modules/cjs/loader');
    Module._load(main, null, true);
  }
}

module.exports = {
  executeUserEntryPoint,
  handleMainPromise,
};