Function patchProcessObject

lib/internal/process/pre_execution.js:264–319

* Patch the process object with legacy properties and normalizations. * Replace `process.argv[0]` with `process.execPath`, preserving the original `argv[0]` value as `process.argv0`. * Replace `process.argv[1]` with the resolved absolute file path of the entry point, if found. * @param {boolean}

(expandArgv1)

 * @returns {string}
 */
function patchProcessObject(expandArgv1) {
  const binding = internalBinding('process_methods');
  binding.patchProcessObject(process);

  // Since we replace process.argv[0] below, preserve the original value in case the user needs it.
  ObjectDefineProperty(process, 'argv0', {
    __proto__: null,
    enumerable: true,
    // Only set it to true during snapshot building.
    configurable: isBuildingSnapshot(),
    value: process.argv[0],
  });

  process.exitCode = undefined;
  process._exiting = false;
  process.argv[0] = process.execPath;

  /** @type {string} */
  let mainEntry;
  // If requested, update process.argv[1] to replace whatever the user provided with the resolved absolute file path of
  // the entry point.
  if (expandArgv1 && process.argv[1] && process.argv[1][0] !== '-') {
    // Expand process.argv[1] into a full path.
    const path = require('path');
    try {
      mainEntry = path.resolve(process.argv[1]);
      process.argv[1] = mainEntry;
    } catch {
      // Continue regardless of error.
    }
  }

  // We need to initialize the global console here again with process.stdout
  // and friends for snapshot deserialization.
  const globalConsole = require('internal/console/global');
  const { initializeGlobalConsole } = require('internal/console/constructor');
  initializeGlobalConsole(globalConsole);

  // TODO(joyeecheung): most of these should be deprecated and removed,
  // except some that we need to be able to mutate during run time.
  addReadOnlyProcessAlias('_eval', '--eval');
  addReadOnlyProcessAlias('_print_eval', '--print');
  addReadOnlyProcessAlias('_syntax_check_only', '--check');
  addReadOnlyProcessAlias('_forceRepl', '--interactive');
  addReadOnlyProcessAlias('_preload_modules', '--require');
  addReadOnlyProcessAlias('noDeprecation', '--no-deprecation');
  addReadOnlyProcessAlias('noProcessWarnings', '--no-warnings');
  addReadOnlyProcessAlias('traceProcessWarnings', '--trace-warnings');
  addReadOnlyProcessAlias('throwDeprecation', '--throw-deprecation');
  addReadOnlyProcessAlias('profProcess', '--prof-process');
  addReadOnlyProcessAlias('traceDeprecation', '--trace-deprecation');
  addReadOnlyProcessAlias('_breakFirstLine', '--inspect-brk', false);
  addReadOnlyProcessAlias('_breakNodeFirstLine', '--inspect-brk-node', false);

  return mainEntry;
}

function addReadOnlyProcessAlias(name, option, enumerable = true) {