[@types/node] use canonical type for stdin, stdout, stderr (#38826)

* use canonical type for stdin, stdout, stderr

* Add missing namespace

* Remove import types usage

types/node/globals.d.ts

@@ -737,31 +737,6 @@ declare namespace NodeJS {
         [key: string]: string | undefined;
     }
 
-    interface WriteStream extends Socket {
-        readonly writableFinished: boolean;
-        readonly writableHighWaterMark: number;
-        readonly writableLength: number;
-        columns?: number;
-        rows?: number;
-        _write(chunk: any, encoding: string, callback: (err?: null | Error) => void): void;
-        _destroy(err: Error | null, callback: (err?: null | Error) => void): void;
-        _final(callback: (err?: null | Error) => void): void;
-        setDefaultEncoding(encoding: string): this;
-        cork(): void;
-        uncork(): void;
-        destroy(error?: Error): void;
-    }
-    interface ReadStream extends Socket {
-        readonly readableHighWaterMark: number;
-        readonly readableLength: number;
-        isRaw?: boolean;
-        setRawMode?(mode: boolean): void;
-        _read(size: number): void;
-        _destroy(err: Error | null, callback: (err?: null | Error) => void): void;
-        push(chunk: any, encoding?: string): boolean;
-        destroy(error?: Error): void;
-    }
-
     interface HRTime {
         (time?: [number, number]): [number, number];
     }

types/node/node-tests.ts

@@ -1119,6 +1119,8 @@ import moduleModule = require('module');
 /////////////////////////////////////////////////////////
 /// stream tests : https://nodejs.org/api/stream.html ///
 /////////////////////////////////////////////////////////
+import stream = require('stream');
+import tty = require('tty');
 
 {
     const writeStream = fs.createWriteStream('./index.d.ts');
@@ -1126,6 +1128,11 @@ import moduleModule = require('module');
 
     const readStream = fs.createReadStream('./index.d.ts');
     const _rom = readStream.readableObjectMode; // $ExpectType boolean
+
+    const x: stream.Readable = process.stdin;
+    const stdin: tty.ReadStream = process.stdin;
+    const stdout: tty.WriteStream = process.stdout;
+    const stderr: tty.WriteStream = process.stderr;
 }
 
 ////////////////////////////////////////////////////

types/node/process.d.ts

@@ -1,3 +1,15 @@
 declare module "process" {
+    import * as tty from "tty";
+
+    global {
+        namespace NodeJS {
+            // this namespace merge is here because these are specifically used
+            // as the type for process.stdin, process.stdout, and process.stderr.
+            // they can't live in tty.d.ts because we need to disambiguate the imported name.
+            interface ReadStream extends tty.ReadStream {}
+            interface WriteStream extends tty.WriteStream {}
+        }
+    }
+
     export = process;
 }