Function resolveMainPath

lib/internal/modules/run_main.js:29–45

* Get the absolute path to the main entry point. * @param {string} main - Entry point path * @returns {string|undefined}

(main)

 * @returns {string|undefined}
 */
function resolveMainPath(main) {
  /** @type {string} */
  let mainPath;
  // Extension searching for the main entry point is supported for backward compatibility.
  // Module._findPath is monkey-patchable here.
  const { Module } = require('internal/modules/cjs/loader');
  mainPath = Module._findPath(path.resolve(main), null, true);
  if (!mainPath) { return; }

  const preserveSymlinksMain = getOptionValue('--preserve-symlinks-main');
  if (!preserveSymlinksMain) {
    const { toRealPath } = require('internal/modules/helpers');
    mainPath = toRealPath(mainPath);
  }

  return mainPath;
}

/**
 * Determine whether the main entry point should be loaded through the ESM Loader.