feat(util-waiter): add waiter utilities package

packages/util-waiter/.gitignore

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+/node_modules/
+/build/
+/coverage/
+/docs/
+*.tsbuildinfo
+*.tgz
+*.log
+package-lock.json

packages/util-waiter/.npmignore

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+/coverage/
+tsconfig.test.json
+*.tsbuildinfo
+jest.config.js
+
+*.spec.js
+*.spec.ts
+*.spec.d.ts
+*.spec.js.map
+
+*.mock.js
+*.mock.d.ts
+*.mock.js.map
+
+*.fixture.js
+*.fixture.d.ts
+*.fixture.js.map

packages/util-waiter/CHANGELOG.md

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+# Change Log
+
+All notable changes to this project will be documented in this file.
+See [Conventional Commits](https://conventionalcommits.org) for commit guidelines.

packages/util-waiter/LICENSE

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packages/util-waiter/README.md

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+# @aws-sdk/util-waiter
+
+[![NPM version](https://img.shields.io/npm/v/@aws-sdk/util-waiter/rc.svg)](https://www.npmjs.com/package/@aws-sdk/util-waiter)
+[![NPM downloads](https://img.shields.io/npm/dm/@aws-sdk/util-waiter.svg)](https://www.npmjs.com/package/@aws-sdk/util-waiter)
+
+> An internal package
+
+## Usage
+
+You probably shouldn't, at least directly.

packages/util-waiter/jest.config.js

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+const base = require("../../jest.config.base.js");
+
+module.exports = {
+  ...base,
+};

packages/util-waiter/package.json

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+{
+  "name": "@aws-sdk/util-waiter",
+  "version": "1.0.0-rc.8",
+  "description": "Shared utilities for client waiters for the AWS SDK",
+  "dependencies": {
+    "tslib": "^1.8.0",
+    "@aws-sdk/abort-controller": "1.0.0-rc.8"
+  },
+  "devDependencies": {
+    "@types/jest": "^26.0.4",
+    "jest": "^26.1.0",
+    "typescript": "~4.1.2"
+  },
+  "scripts": {
+    "prepublishOnly": "yarn build:cjs && yarn build:es",
+    "pretest": "yarn build:cjs",
+    "build:cjs": "tsc -p tsconfig.cjs.json",
+    "build:es": "tsc -p tsconfig.es.json",
+    "build": "yarn build:es && yarn build:cjs",
+    "test": "jest"
+  },
+  "author": {
+    "name": "AWS SDK for JavaScript Team",
+    "url": "https://aws.amazon.com/javascript/"
+  },
+  "license": "Apache-2.0",
+  "main": "./dist/cjs/index.js",
+  "module": "./dist/es/index.js",
+  "types": "./dist/cjs/index.d.ts",
+  "engines": {
+    "node": ">= 10.0.0"
+  },
+  "homepage": "https://github.com/aws/aws-sdk-js-v3/tree/master/packages/util-waiter",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/aws/aws-sdk-js-v3.git",
+    "directory": "packages/util-waiter"
+  }
+}

packages/util-waiter/src/index.spec.ts

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+import * as exported from "./index";
+
+describe("Waiter util module exports", () => {
+  it("should export the proper functions", () => {
+    expect(exported.sleep).toBeDefined();
+    expect(exported.waiterTimeout).toBeDefined();
+    expect(exported.abortTimeout).toBeDefined();
+    expect(exported.validateWaiterOptions).toBeDefined();
+    expect(exported.runPolling).toBeDefined();
+  });
+});

packages/util-waiter/src/index.ts

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+export * from "./utils/validate";
+export * from "./utils/sleep";
+export * from "./poller";
+export * from "./waiter";