Add package are-we-there-yet (#16783)

types/are-we-there-yet/are-we-there-yet-tests.ts

@@ -0,0 +1,25 @@
+import { Tracker, TrackerStream, TrackerGroup } from "are-we-there-yet";
+
+let simple = new Tracker("simple");
+simple.addListener("change", (name, completed, tracker) => {
+    console.log(`name: ${name}, completed: ${completed}`);
+});
+simple.addWork(10);
+simple.completeWork(1);
+console.log(simple.completed() < 1);
+
+let group = new TrackerGroup("group");
+group.addUnit(simple);
+
+let subgroup = group.newGroup("subgroup");
+console.log(group.completed());
+
+let stream = new TrackerStream("stream", 100, { encoding: "utf8" });
+subgroup.addUnit(stream);
+
+stream.addListener("change", (name, completed, tracker) => {
+    console.log(`name: ${name}, completed: ${completed}`);
+});
+
+simple.finish();
+console.log(group.debug());

types/are-we-there-yet/index.d.ts

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+// Type definitions for are-we-there-yet 1.1
+// Project: https://github.com/iarna/are-we-there-yet
+// Definitions by: Brian J Brennan <https://github.com/brianloveswords>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+/// <reference types="node" />
+
+import { EventEmitter } from "events";
+import { Transform, TransformOptions } from "stream";
+
+export type TrackerObject = Tracker | TrackerGroup | TrackerStream;
+export type TrackerEventListener = (name: string, completed: number, tracker: TrackerObject) => void;
+export type GenericEventListener = (...args: any[]) => void;
+
+export class TrackerBase extends EventEmitter {
+    constructor(name?: string);
+    addListener(event: "change", listener: TrackerEventListener): this;
+    addListener(event: string, listener: GenericEventListener): this;
+    on(event: "change", listener: TrackerEventListener): this;
+    on(event: string, listener: GenericEventListener): this;
+    once(event: "change", listener: TrackerEventListener): this;
+    once(event: string, listener: GenericEventListener): this;
+    prependListener(event: "change", listener: TrackerEventListener): this;
+    prependListener(event: string, listener: GenericEventListener): this;
+    prependOnceListener(event: "change", listener: TrackerEventListener): this;
+    prependOnceListener(event: string, listener: GenericEventListener): this;
+    removeListener(event: "change", listener: TrackerEventListener): this;
+    removeListener(event: string, listener: GenericEventListener): this;
+}
+
+export class Tracker extends TrackerBase {
+    constructor(name?: string, todo?: number);
+    addWork(work: number): void;
+    completeWork(completed: number): void;
+    completed(): number;
+    finish(): void;
+}
+
+export class TrackerGroup extends TrackerBase {
+    constructor(name?: string);
+    addUnit(tracker: TrackerBase, weight?: number): TrackerObject;
+    completed(): number;
+    debug(): string;
+    finish(): void;
+    newGroup(name?: string, weight?: number): TrackerGroup;
+    newItem(name?: string, todo?: number, weight?: number): Tracker;
+    newStream(name?: string, todo?: number, weight?: number): TrackerStream;
+}
+
+export class TrackerStream extends Transform {
+    constructor(name?: string, size?: number, options?: TransformOptions);
+    addWork(work: number): void;
+    completed(): number;
+
+    addListener(event: "change", listener: TrackerEventListener): this;
+    addListener(event: "data", listener: (chunk: Buffer | string) => void): this;
+    addListener(event: "readable" | "end" | "close", listener: () => void): this;
+    addListener(event: "error", listener: (err: Error) => void): this;
+    addListener(event: string, listener: GenericEventListener): this;
+
+    on(event: "change", listener: TrackerEventListener): this;
+    on(event: "data", listener: (chunk: Buffer | string) => void): this;
+    on(event: "readable" | "end" | "close", listener: () => void): this;
+    on(event: "error", listener: (err: Error) => void): this;
+    on(event: string, listener: GenericEventListener): this;
+
+    once(event: "change", listener: TrackerEventListener): this;
+    once(event: "data", listener: (chunk: Buffer | string) => void): this;
+    once(event: "readable" | "end" | "close", listener: () => void): this;
+    once(event: "error", listener: (err: Error) => void): this;
+    once(event: string, listener: GenericEventListener): this;
+
+    prependListener(event: "change", listener: TrackerEventListener): this;
+    prependListener(event: "data", listener: (chunk: Buffer | string) => void): this;
+    prependListener(event: "readable" | "end" | "close", listener: () => void): this;
+    prependListener(event: "error", listener: (err: Error) => void): this;
+    prependListener(event: string, listener: GenericEventListener): this;
+
+    prependOnceListener(event: "change", listener: TrackerEventListener): this;
+    prependOnceListener(event: "data", listener: (chunk: Buffer | string) => void): this;
+    prependOnceListener(event: "readable" | "end" | "close", listener: () => void): this;
+    prependOnceListener(event: "error", listener: (err: Error) => void): this;
+    prependOnceListener(event: string, listener: GenericEventListener): this;
+
+    removeListener(event: "change", listener: TrackerEventListener): this;
+    removeListener(event: "data", listener: (chunk: Buffer | string) => void): this;
+    removeListener(event: "readable" | "end" | "close", listener: () => void): this;
+    removeListener(event: "error", listener: (err: Error) => void): this;
+    removeListener(event: string, listener: GenericEventListener): this;
+}

types/are-we-there-yet/tsconfig.json

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+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": [
+            "es6"
+        ],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictNullChecks": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": [
+        "index.d.ts",
+        "are-we-there-yet-tests.ts"
+    ]
+}

types/are-we-there-yet/tslint.json

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+{ "extends": "dtslint/dt.json" }