denoland-deno/ext/node/polyfills/process.ts

// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
// Copyright Joyent, Inc. and Node.js contributors. All rights reserved. MIT license.

// TODO(petamoriken): enable prefer-primordials for node polyfills
// deno-lint-ignore-file prefer-primordials

import { core, internals } from "ext:core/mod.js";
import { initializeDebugEnv } from "ext:deno_node/internal/util/debuglog.ts";
import {
  op_geteuid,
  op_node_process_kill,
  op_process_abort,
  op_set_exit_code,
} from "ext:core/ops";

import { warnNotImplemented } from "ext:deno_node/_utils.ts";
import { EventEmitter } from "node:events";
import Module from "node:module";
import { report } from "ext:deno_node/internal/process/report.ts";
import { validateString } from "ext:deno_node/internal/validators.mjs";
import {
  ERR_INVALID_ARG_TYPE,
  ERR_UNKNOWN_SIGNAL,
  errnoException,
} from "ext:deno_node/internal/errors.ts";
import { getOptionValue } from "ext:deno_node/internal/options.ts";
import { assert } from "ext:deno_node/_util/asserts.ts";
import { join } from "node:path";
import { pathFromURL } from "ext:deno_web/00_infra.js";
import {
  arch as arch_,
  chdir,
  cwd,
  env,
  nextTick as _nextTick,
  version,
  versions,
} from "ext:deno_node/_process/process.ts";
import { _exiting } from "ext:deno_node/_process/exiting.ts";
export { _nextTick as nextTick, chdir, cwd, env, version, versions };
import {
  createWritableStdioStream,
  initStdin,
} from "ext:deno_node/_process/streams.mjs";
import {
  enableNextTick,
  processTicksAndRejections,
  runNextTicks,
} from "ext:deno_node/_next_tick.ts";
import { isWindows } from "ext:deno_node/_util/os.ts";
import * as io from "ext:deno_io/12_io.js";

export let argv0 = "";

export let arch = "";

export let platform = "";

export let pid = 0;

let stdin, stdout, stderr;

export { stderr, stdin, stdout };

import { getBinding } from "ext:deno_node/internal_binding/mod.ts";
import * as constants from "ext:deno_node/internal_binding/constants.ts";
import * as uv from "ext:deno_node/internal_binding/uv.ts";
import type { BindingName } from "ext:deno_node/internal_binding/mod.ts";
import { buildAllowedFlags } from "ext:deno_node/internal/process/per_thread.mjs";

const notImplementedEvents = [
  "multipleResolves",
  "worker",
];

export const argv: string[] = ["", ""];
let globalProcessExitCode: number | undefined = undefined;

/** https://nodejs.org/api/process.html#process_process_exit_code */
export const exit = (code?: number | string) => {
  if (code || code === 0) {
    if (typeof code === "string") {
      const parsedCode = parseInt(code);
      globalProcessExitCode = isNaN(parsedCode) ? undefined : parsedCode;
    } else {
      globalProcessExitCode = code;
    }
  }

  if (!process._exiting) {
    process._exiting = true;
    // FIXME(bartlomieju): this is wrong, we won't be using syscall to exit
    // and thus the `unload` event will not be emitted to properly trigger "emit"
    // event on `process`.
    process.emit("exit", process.exitCode || 0);
  }

  process.reallyExit(process.exitCode || 0);
};

/** https://nodejs.org/api/process.html#processumaskmask */
export const umask = () => {
  // Always return the system default umask value.
  // We don't use Deno.umask here because it has a race
  // condition bug.
  // See https://github.com/denoland/deno_std/issues/1893#issuecomment-1032897779
  return 0o22;
};

export const abort = () => {
  op_process_abort();
};

function addReadOnlyProcessAlias(
  name: string,
  option: string,
  enumerable = true,
) {
  const value = getOptionValue(option);

  if (value) {
    Object.defineProperty(process, name, {
      writable: false,
      configurable: true,
      enumerable,
      value,
    });
  }
}

function createWarningObject(
  warning: string,
  type: string,
  code?: string,
  // deno-lint-ignore ban-types
  ctor?: Function,
  detail?: string,
): Error {
  assert(typeof warning === "string");

  // deno-lint-ignore no-explicit-any
  const warningErr: any = new Error(warning);
  warningErr.name = String(type || "Warning");

  if (code !== undefined) {
    warningErr.code = code;
  }
  if (detail !== undefined) {
    warningErr.detail = detail;
  }

  // @ts-ignore this function is not available in lib.dom.d.ts
  Error.captureStackTrace(warningErr, ctor || process.emitWarning);

  return warningErr;
}

function doEmitWarning(warning: Error) {
  process.emit("warning", warning);
}

/** https://nodejs.org/api/process.html#process_process_emitwarning_warning_options */
export function emitWarning(
  warning: string | Error,
  type:
    // deno-lint-ignore ban-types
    | { type: string; detail: string; code: string; ctor: Function }
    | string
    | null,
  code?: string,
  // deno-lint-ignore ban-types
  ctor?: Function,
) {
  let detail;

  if (type !== null && typeof type === "object" && !Array.isArray(type)) {
    ctor = type.ctor;
    code = type.code;

    if (typeof type.detail === "string") {
      detail = type.detail;
    }

    type = type.type || "Warning";
  } else if (typeof type === "function") {
    ctor = type;
    code = undefined;
    type = "Warning";
  }

  if (type !== undefined) {
    validateString(type, "type");
  }

  if (typeof code === "function") {
    ctor = code;
    code = undefined;
  } else if (code !== undefined) {
    validateString(code, "code");
  }

  if (typeof warning === "string") {
    warning = createWarningObject(warning, type as string, code, ctor, detail);
  } else if (!(warning instanceof Error)) {
    throw new ERR_INVALID_ARG_TYPE("warning", ["Error", "string"], warning);
  }

  if (warning.name === "DeprecationWarning") {
    // deno-lint-ignore no-explicit-any
    if ((process as any).noDeprecation) {
      return;
    }

    // deno-lint-ignore no-explicit-any
    if ((process as any).throwDeprecation) {
      // Delay throwing the error to guarantee that all former warnings were
      // properly logged.
      return process.nextTick(() => {
        throw warning;
      });
    }
  }

  process.nextTick(doEmitWarning, warning);
}

export function hrtime(time?: [number, number]): [number, number] {
  const milli = performance.now();
  const sec = Math.floor(milli / 1000);
  const nano = Math.floor(milli * 1_000_000 - sec * 1_000_000_000);
  if (!time) {
    return [sec, nano];
  }
  const [prevSec, prevNano] = time;
  return [sec - prevSec, nano - prevNano];
}

hrtime.bigint = function (): bigint {
  const [sec, nano] = hrtime();
  return BigInt(sec) * 1_000_000_000n + BigInt(nano);
};

export function memoryUsage(): {
  rss: number;
  heapTotal: number;
  heapUsed: number;
  external: number;
  arrayBuffers: number;
} {
  return {
    ...Deno.memoryUsage(),
    arrayBuffers: 0,
  };
}

memoryUsage.rss = function (): number {
  return memoryUsage().rss;
};

// Returns a negative error code than can be recognized by errnoException
function _kill(pid: number, sig: number): number {
  const maybeSignal = Object.entries(constants.os.signals).find((
    [_, numericCode],
  ) => numericCode === sig);

  if (!maybeSignal) {
    return uv.codeMap.get("EINVAL");
  }
  return op_node_process_kill(pid, sig);
}

export function dlopen(module, filename, _flags) {
  // NOTE(bartlomieju): _flags is currently ignored, but we don't warn for it
  // as it makes DX bad, even though it might not be needed:
  // https://github.com/denoland/deno/issues/20075
  Module._extensions[".node"](module, filename);
  return module;
}

export function kill(pid: number, sig: string | number = "SIGTERM") {
  if (pid != (pid | 0)) {
    throw new ERR_INVALID_ARG_TYPE("pid", "number", pid);
  }

  let err;
  if (typeof sig === "number") {
    err = process._kill(pid, sig);
  } else {
    if (sig in constants.os.signals) {
      // @ts-ignore Index previously checked
      err = process._kill(pid, constants.os.signals[sig]);
    } else {
      throw new ERR_UNKNOWN_SIGNAL(sig);
    }
  }

  if (err) {
    throw errnoException(err, "kill");
  }

  return true;
}

let getgid, getuid, geteuid;

if (!isWindows) {
  getgid = () => Deno.gid();
  getuid = () => Deno.uid();
  geteuid = () => op_geteuid();
}

export { geteuid, getgid, getuid };

// deno-lint-ignore no-explicit-any
function uncaughtExceptionHandler(err: any, origin: string) {
  // The origin parameter can be 'unhandledRejection' or 'uncaughtException'
  // depending on how the uncaught exception was created. In Node.js,
  // exceptions thrown from the top level of a CommonJS module are reported as
  // 'uncaughtException', while exceptions thrown from the top level of an ESM
  // module are reported as 'unhandledRejection'. Deno does not have a true
  // CommonJS implementation, so all exceptions thrown from the top level are
  // reported as 'uncaughtException'.
  process.emit("uncaughtExceptionMonitor", err, origin);
  process.emit("uncaughtException", err, origin);
}

let execPath: string | null = null;

class Process extends EventEmitter {
  constructor() {
    super();
  }

  /** https://nodejs.org/api/process.html#processrelease */
  get release() {
    return {
      name: "node",
      sourceUrl:
        `https://nodejs.org/download/release/${version}/node-${version}.tar.gz`,
      headersUrl:
        `https://nodejs.org/download/release/${version}/node-${version}-headers.tar.gz`,
    };
  }

  /** https://nodejs.org/api/process.html#process_process_arch */
  get arch() {
    return arch;
  }

  get report() {
    return report;
  }

  get title() {
    return "deno";
  }

  set title(_value) {
    // NOTE(bartlomieju): this is a noop. Node.js doesn't guarantee that the
    // process name will be properly set and visible from other tools anyway.
    // Might revisit in the future.
  }

  /**
   * https://nodejs.org/api/process.html#process_process_argv
   * Read permissions are required in order to get the executable route
   */
  argv = argv;

  get argv0() {
    return argv0;
  }

  set argv0(_val) {}

  /** https://nodejs.org/api/process.html#process_process_chdir_directory */
  chdir = chdir;

  /** https://nodejs.org/api/process.html#processconfig */
  config = {
    target_defaults: {},
    variables: {},
  };

  /** https://nodejs.org/api/process.html#process_process_cwd */
  cwd = cwd;

  /**
   * https://nodejs.org/api/process.html#process_process_env
   * Requires env permissions
   */
  env = env;

  /** https://nodejs.org/api/process.html#process_process_execargv */
  execArgv: string[] = [];

  /** https://nodejs.org/api/process.html#process_process_exit_code */
  exit = exit;

  /** https://nodejs.org/api/process.html#processabort */
  abort = abort;

  // Undocumented Node API that is used by `signal-exit` which in turn
  // is used by `node-tap`. It was marked for removal a couple of years
  // ago. See https://github.com/nodejs/node/blob/6a6b3c54022104cc110ab09044a2a0cecb8988e7/lib/internal/bootstrap/node.js#L172
  reallyExit = (code: number) => {
    return Deno.exit(code || 0);
  };

  _exiting = _exiting;

  /** https://nodejs.org/api/process.html#processexitcode_1 */
  get exitCode() {
    return globalProcessExitCode;
  }

  set exitCode(code: number | undefined) {
    globalProcessExitCode = code;
    code = parseInt(code) || 0;
    if (!isNaN(code)) {
      op_set_exit_code(code);
    }
  }

  // Typed as any to avoid importing "module" module for types
  // deno-lint-ignore no-explicit-any
  mainModule: any = undefined;

  /** https://nodejs.org/api/process.html#process_process_nexttick_callback_args */
  nextTick = _nextTick;

  dlopen = dlopen;

  /** https://nodejs.org/api/process.html#process_process_events */
  override on(event: "exit", listener: (code: number) => void): this;
  override on(
    event: typeof notImplementedEvents[number],
    // deno-lint-ignore ban-types
    listener: Function,
  ): this;
  // deno-lint-ignore no-explicit-any
  override on(event: string, listener: (...args: any[]) => void): this {
    if (notImplementedEvents.includes(event)) {
      warnNotImplemented(`process.on("${event}")`);
      super.on(event, listener);
    } else if (event.startsWith("SIG")) {
      if (event === "SIGBREAK" && Deno.build.os !== "windows") {
        // Ignores SIGBREAK if the platform is not windows.
      } else if (event === "SIGTERM" && Deno.build.os === "windows") {
        // Ignores SIGTERM on windows.
      } else {
        Deno.addSignalListener(event as Deno.Signal, listener);
      }
    } else {
      super.on(event, listener);
    }

    return this;
  }

  override off(event: "exit", listener: (code: number) => void): this;
  override off(
    event: typeof notImplementedEvents[number],
    // deno-lint-ignore ban-types
    listener: Function,
  ): this;
  // deno-lint-ignore no-explicit-any
  override off(event: string, listener: (...args: any[]) => void): this {
    if (notImplementedEvents.includes(event)) {
      warnNotImplemented(`process.off("${event}")`);
      super.off(event, listener);
    } else if (event.startsWith("SIG")) {
      if (event === "SIGBREAK" && Deno.build.os !== "windows") {
        // Ignores SIGBREAK if the platform is not windows.
      } else if (event === "SIGTERM" && Deno.build.os === "windows") {
        // Ignores SIGTERM on windows.
      } else {
        Deno.removeSignalListener(event as Deno.Signal, listener);
      }
    } else {
      super.off(event, listener);
    }

    return this;
  }

  // deno-lint-ignore no-explicit-any
  override emit(event: string, ...args: any[]): boolean {
    if (event.startsWith("SIG")) {
      if (event === "SIGBREAK" && Deno.build.os !== "windows") {
        // Ignores SIGBREAK if the platform is not windows.
      } else {
        Deno.kill(Deno.pid, event as Deno.Signal);
      }
    } else {
      return super.emit(event, ...args);
    }

    return true;
  }

  override prependListener(
    event: "exit",
    listener: (code: number) => void,
  ): this;
  override prependListener(
    event: typeof notImplementedEvents[number],
    // deno-lint-ignore ban-types
    listener: Function,
  ): this;
  override prependListener(
    event: string,
    // deno-lint-ignore no-explicit-any
    listener: (...args: any[]) => void,
  ): this {
    if (notImplementedEvents.includes(event)) {
      warnNotImplemented(`process.prependListener("${event}")`);
      super.prependListener(event, listener);
    } else if (event.startsWith("SIG")) {
      if (event === "SIGBREAK" && Deno.build.os !== "windows") {
        // Ignores SIGBREAK if the platform is not windows.
      } else {
        Deno.addSignalListener(event as Deno.Signal, listener);
      }
    } else {
      super.prependListener(event, listener);
    }

    return this;
  }

  /** https://nodejs.org/api/process.html#process_process_pid */
  get pid() {
    return pid;
  }

  /** https://nodejs.org/api/process.html#processppid */
  get ppid() {
    return Deno.ppid;
  }

  /** https://nodejs.org/api/process.html#process_process_platform */
  get platform() {
    return platform;
  }

  // https://nodejs.org/api/process.html#processsetsourcemapsenabledval
  setSourceMapsEnabled(_val: boolean) {
    // This is a no-op in Deno. Source maps are always enabled.
    // TODO(@satyarohith): support disabling source maps if needed.
  }

  override addListener(event: "exit", listener: (code: number) => void): this;
  override addListener(
    event: typeof notImplementedEvents[number],
    // deno-lint-ignore ban-types
    listener: Function,
  ): this;
  override addListener(
    event: string,
    // deno-lint-ignore no-explicit-any
    listener: (...args: any[]) => void,
  ): this {
    if (notImplementedEvents.includes(event)) {
      warnNotImplemented(`process.addListener("${event}")`);
    }

    return this.on(event, listener);
  }

  override removeListener(
    event: "exit",
    listener: (code: number) => void,
  ): this;
  override removeListener(
    event: typeof notImplementedEvents[number],
    // deno-lint-ignore ban-types
    listener: Function,
  ): this;
  override removeListener(
    event: string,
    // deno-lint-ignore no-explicit-any
    listener: (...args: any[]) => void,
  ): this {
    if (notImplementedEvents.includes(event)) {
      warnNotImplemented(`process.removeListener("${event}")`);
    }

    return this.off(event, listener);
  }

  /**
   * Returns the current high-resolution real time in a [seconds, nanoseconds]
   * tuple.
   *
   * Note: You need to give --allow-hrtime permission to Deno to actually get
   * nanoseconds precision values. If you don't give 'hrtime' permission, the returned
   * values only have milliseconds precision.
   *
   * `time` is an optional parameter that must be the result of a previous process.hrtime() call to diff with the current time.
   *
   * These times are relative to an arbitrary time in the past, and not related to the time of day and therefore not subject to clock drift. The primary use is for measuring performance between intervals.
   * https://nodejs.org/api/process.html#process_process_hrtime_time
   */
  hrtime = hrtime;

  /**
   * @private
   *
   * NodeJS internal, use process.kill instead
   */
  _kill = _kill;

  /** https://nodejs.org/api/process.html#processkillpid-signal */
  kill = kill;

  memoryUsage = memoryUsage;

  /** https://nodejs.org/api/process.html#process_process_stderr */
  stderr = stderr;

  /** https://nodejs.org/api/process.html#process_process_stdin */
  stdin = stdin;

  /** https://nodejs.org/api/process.html#process_process_stdout */
  stdout = stdout;

  /** https://nodejs.org/api/process.html#process_process_version */
  version = version;

  /** https://nodejs.org/api/process.html#process_process_versions */
  versions = versions;

  /** https://nodejs.org/api/process.html#process_process_emitwarning_warning_options */
  emitWarning = emitWarning;

  binding(name: BindingName) {
    return getBinding(name);
  }

  /** https://nodejs.org/api/process.html#processumaskmask */
  umask() {
    // Always return the system default umask value.
    // We don't use Deno.umask here because it has a race
    // condition bug.
    // See https://github.com/denoland/deno_std/issues/1893#issuecomment-1032897779
    return 0o22;
  }

  /** This method is removed on Windows */
  getgid = getgid;

  /** This method is removed on Windows */
  getuid = getuid;

  /** This method is removed on Windows */
  geteuid = geteuid;

  // TODO(kt3k): Implement this when we added -e option to node compat mode
  _eval: string | undefined = undefined;

  /** https://nodejs.org/api/process.html#processexecpath */
  get execPath() {
    if (execPath) {
      return execPath;
    }
    execPath = Deno.execPath();
    return execPath;
  }

  set execPath(path: string) {
    execPath = path;
  }

  /** https://nodejs.org/api/process.html#processuptime */
  uptime() {
    return Number((performance.now() / 1000).toFixed(9));
  }

  #allowedFlags = buildAllowedFlags();
  /** https://nodejs.org/api/process.html#processallowednodeenvironmentflags */
  get allowedNodeEnvironmentFlags() {
    return this.#allowedFlags;
  }

  features = { inspector: false };

  // TODO(kt3k): Get the value from --no-deprecation flag.
  noDeprecation = false;
}

if (isWindows) {
  delete Process.prototype.getgid;
  delete Process.prototype.getuid;
  delete Process.prototype.geteuid;
}

/** https://nodejs.org/api/process.html#process_process */
const process = new Process();

Object.defineProperty(process, Symbol.toStringTag, {
  enumerable: false,
  writable: true,
  configurable: false,
  value: "process",
});

addReadOnlyProcessAlias("noDeprecation", "--no-deprecation");
addReadOnlyProcessAlias("throwDeprecation", "--throw-deprecation");

export const removeListener = process.removeListener;
export const removeAllListeners = process.removeAllListeners;

let unhandledRejectionListenerCount = 0;
let rejectionHandledListenerCount = 0;
let uncaughtExceptionListenerCount = 0;
let beforeExitListenerCount = 0;
let exitListenerCount = 0;

process.on("newListener", (event: string) => {
  switch (event) {
    case "unhandledRejection":
      unhandledRejectionListenerCount++;
      break;
    case "rejectionHandled":
      rejectionHandledListenerCount++;
      break;
    case "uncaughtException":
      uncaughtExceptionListenerCount++;
      break;
    case "beforeExit":
      beforeExitListenerCount++;
      break;
    case "exit":
      exitListenerCount++;
      break;
    default:
      return;
  }
  synchronizeListeners();
});

process.on("removeListener", (event: string) => {
  switch (event) {
    case "unhandledRejection":
      unhandledRejectionListenerCount--;
      break;
    case "rejectionHandled":
      rejectionHandledListenerCount--;
      break;
    case "uncaughtException":
      uncaughtExceptionListenerCount--;
      break;
    case "beforeExit":
      beforeExitListenerCount--;
      break;
    case "exit":
      exitListenerCount--;
      break;
    default:
      return;
  }
  synchronizeListeners();
});

function processOnError(event: ErrorEvent) {
  if (process.listenerCount("uncaughtException") > 0) {
    event.preventDefault();
  }

  uncaughtExceptionHandler(event.error, "uncaughtException");
}

function dispatchProcessBeforeExitEvent() {
  process.emit("beforeExit", process.exitCode || 0);
  processTicksAndRejections();
  return core.eventLoopHasMoreWork();
}

function dispatchProcessExitEvent() {
  if (!process._exiting) {
    process._exiting = true;
    process.emit("exit", process.exitCode || 0);
  }
}

function synchronizeListeners() {
  // Install special "unhandledrejection" handler, that will be called
  // last.
  if (
    unhandledRejectionListenerCount > 0 || uncaughtExceptionListenerCount > 0
  ) {
    internals.nodeProcessUnhandledRejectionCallback = (event) => {
      if (process.listenerCount("unhandledRejection") === 0) {
        // The Node.js default behavior is to raise an uncaught exception if
        // an unhandled rejection occurs and there are no unhandledRejection
        // listeners.

        event.preventDefault();
        uncaughtExceptionHandler(event.reason, "unhandledRejection");
        return;
      }

      event.preventDefault();
      process.emit("unhandledRejection", event.reason, event.promise);
    };
  } else {
    internals.nodeProcessUnhandledRejectionCallback = undefined;
  }

  // Install special "handledrejection" handler, that will be called
  // last.
  if (rejectionHandledListenerCount > 0) {
    internals.nodeProcessRejectionHandledCallback = (event) => {
      process.emit("rejectionHandled", event.reason, event.promise);
    };
  } else {
    internals.nodeProcessRejectionHandledCallback = undefined;
  }

  if (uncaughtExceptionListenerCount > 0) {
    globalThis.addEventListener("error", processOnError);
  } else {
    globalThis.removeEventListener("error", processOnError);
  }
}

// Overwrites the 1st and 2nd items with getters.
Object.defineProperty(argv, "0", { get: () => argv0 });
Object.defineProperty(argv, "1", {
  get: () => {
    if (Deno.mainModule?.startsWith("file:")) {
      return pathFromURL(new URL(Deno.mainModule));
    } else {
      return join(Deno.cwd(), "$deno$node.js");
    }
  },
});

internals.dispatchProcessBeforeExitEvent = dispatchProcessBeforeExitEvent;
internals.dispatchProcessExitEvent = dispatchProcessExitEvent;
// Should be called only once, in `runtime/js/99_main.js` when the runtime is
// bootstrapped.
internals.__bootstrapNodeProcess = function (
  argv0Val: string | undefined,
  args: string[],
  denoVersions: Record<string, string>,
  nodeDebug: string,
  warmup = false,
) {
  if (!warmup) {
    argv0 = argv0Val || "";
    // Manually concatenate these arrays to avoid triggering the getter
    for (let i = 0; i < args.length; i++) {
      argv[i + 2] = args[i];
    }

    for (const [key, value] of Object.entries(denoVersions)) {
      versions[key] = value;
    }

    core.setNextTickCallback(processTicksAndRejections);
    core.setMacrotaskCallback(runNextTicks);
    enableNextTick();

    // Replace stdin if it is not a terminal
    const newStdin = initStdin();
    if (newStdin) {
      stdin = process.stdin = newStdin;
    }

    // Replace stdout/stderr if they are not terminals
    if (!io.stdout.isTerminal()) {
      /** https://nodejs.org/api/process.html#process_process_stdout */
      stdout = process.stdout = createWritableStdioStream(
        io.stdout,
        "stdout",
      );
    }

    if (!io.stderr.isTerminal()) {
      /** https://nodejs.org/api/process.html#process_process_stderr */
      stderr = process.stderr = createWritableStdioStream(
        io.stderr,
        "stderr",
      );
    }

    arch = arch_();
    platform = isWindows ? "win32" : Deno.build.os;
    pid = Deno.pid;

    initializeDebugEnv(nodeDebug);

    delete internals.__bootstrapNodeProcess;
  } else {
    // Warmup, assuming stdin/stdout/stderr are all terminals
    stdin = process.stdin = initStdin(true);

    /** https://nodejs.org/api/process.html#process_process_stdout */
    stdout = process.stdout = createWritableStdioStream(
      io.stdout,
      "stdout",
      true,
    );

    /** https://nodejs.org/api/process.html#process_process_stderr */
    stderr = process.stderr = createWritableStdioStream(
      io.stderr,
      "stderr",
      true,
    );
  }
};

export default process;