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// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.// Copyright Joyent, Inc. and Node.js contributors. All rights reserved. MIT license.import * as DenoUnstable from "../../_deno_unstable.ts";import { Buffer } from "../buffer.ts";import {  clearLine,  clearScreenDown,  cursorTo,  moveCursor,} from "../internal/readline/callbacks.mjs";import { Readable, Writable } from "../stream.ts";import { stdio } from "./stdio.mjs";
// https://github.com/nodejs/node/blob/00738314828074243c9a52a228ab4c68b04259ef/lib/internal/bootstrap/switches/is_main_thread.js#L41function createWritableStdioStream(writer, name) {  const stream = new Writable({    write(buf, enc, cb) {      if (!writer) {        this.destroy(          new Error(`Deno.${name} is not available in this environment`),        );        return;      }      writer.writeSync(buf instanceof Uint8Array ? buf : Buffer.from(buf, enc));      cb();    },    destroy(err, cb) {      cb(err);      this._undestroy();      if (!this._writableState.emitClose) {        nextTick(() => this.emit("close"));      }    },  });  stream.fd = writer?.rid ?? -1;  stream.destroySoon = stream.destroy;  stream._isStdio = true;  stream.once("close", () => writer?.close());  Object.defineProperties(stream, {    columns: {      enumerable: true,      configurable: true,      get: () =>        Deno.isatty?.(writer?.rid)          ? Deno.consoleSize?.(writer?.rid).columns          : undefined,    },    rows: {      enumerable: true,      configurable: true,      get: () =>        Deno.isatty?.(writer?.rid)          ? Deno.consoleSize?.(writer?.rid).rows          : undefined,    },    isTTY: {      enumerable: true,      configurable: true,      get: () => Deno.isatty?.(writer?.rid),    },    getWindowSize: {      enumerable: true,      configurable: true,      value: () =>        Deno.isatty?.(writer?.rid)          ? Object.values(Deno.consoleSize?.(writer?.rid))          : undefined,    },  });
  if (Deno.isatty?.(writer?.rid)) {    // These belong on tty.WriteStream(), but the TTY streams currently have    // following problems:    // 1. Using them here introduces a circular dependency.    // 2. Creating a net.Socket() from a fd is not currently supported.    stream.cursorTo = function (x, y, callback) {      return cursorTo(this, x, y, callback);    };
    stream.moveCursor = function (dx, dy, callback) {      return moveCursor(this, dx, dy, callback);    };
    stream.clearLine = function (dir, callback) {      return clearLine(this, dir, callback);    };
    stream.clearScreenDown = function (callback) {      return clearScreenDown(this, callback);    };  }
  return stream;}
/** https://nodejs.org/api/process.html#process_process_stderr */export const stderr = stdio.stderr = createWritableStdioStream(  Deno.stderr,  "stderr",);
/** https://nodejs.org/api/process.html#process_process_stdout */export const stdout = stdio.stdout = createWritableStdioStream(  Deno.stdout,  "stdout",);
/** https://nodejs.org/api/process.html#process_process_stdin */export const stdin = stdio.stdin = new Readable({  highWaterMark: 0,  emitClose: false,  read(size) {    const p = Buffer.alloc(size || 16 * 1024);
    if (!Deno.stdin) {      this.destroy(        new Error("Deno.stdin is not available in this environment"),      );      return;    }
    Deno.stdin.read(p).then((length) => {      this.push(length === null ? null : p.slice(0, length));    }, (error) => {      this.destroy(error);    });  },});stdin.on("close", () => Deno.stdin?.close());stdin.fd = Deno.stdin?.rid ?? -1;Object.defineProperty(stdin, "isTTY", {  enumerable: true,  configurable: true,  get() {    return Deno.isatty?.(Deno.stdin.rid);  },});stdin._isRawMode = false;stdin.setRawMode = (enable) => {  DenoUnstable.setRaw?.(Deno.stdin?.rid, enable);  stdin._isRawMode = enable;  return stdin;};Object.defineProperty(stdin, "isRaw", {  enumerable: true,  configurable: true,  get() {    return stdin._isRawMode;  },});