1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
// Copyright Node.js contributors. All rights reserved. MIT License.import { Buffer } from "../buffer.ts";import EventEmitter from "../events.ts";import type Readable from "./readable.ts";import type Writable from "./writable.ts";import { types } from "../util.ts";
class Stream extends EventEmitter {  constructor() {    super();  }
  static _isUint8Array = types.isUint8Array;  static _uint8ArrayToBuffer = (chunk: Uint8Array) => Buffer.from(chunk);
  pipe(dest: Readable | Writable, options?: { end?: boolean }) {    // deno-lint-ignore no-this-alias    const source = this;
    //TODO(Soremwar)    //isStdio exist on stdin || stdout only, which extend from Duplex    //if (!dest._isStdio && (options?.end ?? true)) {    //Find an alternative to be able to pipe streams to stdin & stdout    //Port them as well?    if (options?.end ?? true) {      source.on("end", onend);      source.on("close", onclose);    }
    let didOnEnd = false;    function onend() {      if (didOnEnd) return;      didOnEnd = true;
      // 'end' is only called on Writable streams      (dest as Writable).end();    }
    function onclose() {      if (didOnEnd) return;      didOnEnd = true;
      if (typeof dest.destroy === "function") dest.destroy();    }
    // Don't leave dangling pipes when there are errors.    function onerror(this: Stream, er: Error) {      cleanup();      if (this.listenerCount("error") === 0) {        throw er; // Unhandled stream error in pipe.      }    }
    source.on("error", onerror);    dest.on("error", onerror);
    // Remove all the event listeners that were added.    function cleanup() {      source.removeListener("end", onend);      source.removeListener("close", onclose);
      source.removeListener("error", onerror);      dest.removeListener("error", onerror);
      source.removeListener("end", cleanup);      source.removeListener("close", cleanup);
      dest.removeListener("close", cleanup);    }
    source.on("end", cleanup);    source.on("close", cleanup);
    dest.on("close", cleanup);    dest.emit("pipe", source);
    return dest;  }}
export default Stream;