Add eslint 8 test

Author: D4N14L

build-tests/eslint-8-test/.eslintrc.js

@@ -0,0 +1,25 @@
+// This is a workaround for https://github.com/eslint/eslint/issues/3458
+require('@rushstack/eslint-config/patch/modern-module-resolution');
+
+module.exports = {
+  extends: [
+    '@rushstack/eslint-config/profile/node-trusted-tool',
+    '@rushstack/eslint-config/mixins/friendly-locals'
+  ],
+  parserOptions: { tsconfigRootDir: __dirname },
+
+  overrides: [
+    /**
+     * Override the parser from @rushstack/eslint-config. Since the config is coming
+     * from the workspace instead of the external NPM package, the versions of ESLint
+     * and TypeScript that the config consumes will be resolved from the devDependencies
+     * of the config instead of from the eslint-7-test package. Overriding the parser
+     * ensures that the these dependencies come from the eslint-7-test package. See:
+     * https://github.com/microsoft/rushstack/issues/3021
+     */
+    {
+      files: ['*.ts', '*.tsx'],
+      parser: '@typescript-eslint/parser'
+    }
+  ]
+};

build-tests/eslint-8-test/README.md

@@ -0,0 +1,6 @@
+# eslint-7-test
+
+This project folder is one of the **build-tests** for the Rushstack [ESLint configuration](https://www.npmjs.com/package/@rushstack/eslint-config) (and by extension, the [ESLint plugin](https://www.npmjs.com/package/@rushstack/eslint-plugin))
+package. This project builds using ESLint v7 and contains a simple index file to ensure that the build runs ESLint successfully against source code.
+
+Please see the [ESLint Heft task documentation](https://rushstack.io/pages/heft_tasks/eslint/) for documentation and tutorials.

build-tests/eslint-8-test/config/rig.json

@@ -0,0 +1,7 @@
+{
+  // The "rig.json" file directs tools to look for their config files in an external package.
+  // Documentation for this system: https://www.npmjs.com/package/@rushstack/rig-package
+  "$schema": "https://developer.microsoft.com/json-schemas/rig-package/rig.schema.json",
+
+  "rigPackageName": "local-node-rig"
+}

build-tests/eslint-8-test/package.json

@@ -0,0 +1,21 @@
+{
+  "name": "eslint-8-test",
+  "description": "This project contains a build test to validate ESLint 8 compatibility with the latest version of @rushstack/eslint-config (and by extension, the ESLint plugin)",
+  "version": "1.0.0",
+  "private": true,
+  "main": "lib/index.js",
+  "license": "MIT",
+  "scripts": {
+    "build": "heft build --clean",
+    "_phase:build": "heft run --only build -- --clean"
+  },
+  "devDependencies": {
+    "@rushstack/eslint-config": "workspace:*",
+    "@rushstack/heft": "workspace:*",
+    "local-node-rig": "workspace:*",
+    "@types/node": "18.17.15",
+    "@typescript-eslint/parser": "~5.59.2",
+    "eslint": "~8.7.0",
+    "typescript": "~5.0.4"
+  }
+}

build-tests/eslint-8-test/src/index.ts

@@ -0,0 +1,7 @@
+// Copyright (c) Microsoft Corporation. All rights reserved. Licensed under the MIT license.
+// See LICENSE in the project root for license information.
+
+export class Foo {
+  private _bar: string = 'bar';
+  public baz: string = this._bar;
+}

build-tests/eslint-8-test/tsconfig.json

@@ -0,0 +1,24 @@
+{
+  "$schema": "http://json.schemastore.org/tsconfig",
+
+  "compilerOptions": {
+    "outDir": "lib",
+    "rootDir": "src",
+
+    "forceConsistentCasingInFileNames": true,
+    "declaration": true,
+    "sourceMap": true,
+    "declarationMap": true,
+    "inlineSources": true,
+    "experimentalDecorators": true,
+    "strictNullChecks": true,
+    "noUnusedLocals": true,
+
+    "module": "esnext",
+    "moduleResolution": "node",
+    "target": "es5",
+    "lib": ["es5"]
+  },
+  "include": ["src/**/*.ts", "src/**/*.tsx"],
+  "exclude": ["node_modules", "lib"]
+}

common/config/rush/pnpm-lock.yaml

@@ -1,5 +1,5 @@
 // DO NOT MODIFY THIS FILE MANUALLY BUT DO COMMIT IT. It is generated and used by Rush.
 {
-  "pnpmShrinkwrapHash": "92561e650a0b5a0ffde5b5dcc107d597c755b413",
+  "pnpmShrinkwrapHash": "00aeb975643cac9bd71b0f5af110395618d2eedf",
   "preferredVersionsHash": "1926a5b12ac8f4ab41e76503a0d1d0dccc9c0e06"
 }

common/config/rush/repo-state.json

@@ -536,6 +536,12 @@
       "reviewCategory": "tests",
       "shouldPublish": false
     },
+    {
+      "packageName": "eslint-8-test",
+      "projectFolder": "build-tests/eslint-8-test",
+      "reviewCategory": "tests",
+      "shouldPublish": false
+    },
     {
       "packageName": "package-extractor-test-01",
       "projectFolder": "build-tests/package-extractor-test-01",