nstdlib-nightly/lib/internal/main/run_main_module.mjs

Node.js standard library converted to runtime-agnostic ES modules.

// Source: https://github.com/nodejs/node/blob/65eff1eb/lib/internal/main/run_main_module.js

import * as __hoisted_internal_modules_cjs_loader__ from "nstdlib/lib/internal/modules/cjs/loader";
import {
  prepareMainThreadExecution,
  markBootstrapComplete,
} from "nstdlib/lib/internal/process/pre_execution";
import { getOptionValue } from "nstdlib/lib/internal/options";
import * as __hoisted_internal_modules_run_main__ from "nstdlib/lib/internal/modules/run_main";

const mainEntry = prepareMainThreadExecution(true);

markBootstrapComplete();

// Necessary to reset RegExp statics before user code runs.
RegExp.prototype.exec.call(/^/, "");

if (getOptionValue("--experimental-default-type") === "module") {
  __hoisted_internal_modules_run_main__.executeUserEntryPoint(mainEntry);
} else {
  /**
   * To support legacy monkey-patching of `Module.runMain`, we call `runMain` here to have the CommonJS loader begin
   * the execution of the main entry point, even if the ESM loader immediately takes over because the main entry is an
   * ES module or one of the other opt-in conditions (such as the use of `--import`) are met. Users can monkey-patch
   * before the main entry point is loaded by doing so via scripts loaded through `--require`. This monkey-patchability
   * is undesirable and is removed in `--experimental-default-type=module` mode.
   */
  __hoisted_internal_modules_cjs_loader__.Module.runMain(mainEntry);
}