Updating project linting to ESLint 9

Author: khawkins

.eslintrc

@@ -0,0 +1 @@
+yarn format && yarn lint && yarn test

.husky/pre-commit

@@ -0,0 +1,54 @@
+/*
+ * Copyright (c) 2025, salesforce.com, inc.
+ * All rights reserved.
+ * SPDX-License-Identifier: MIT
+ * For full license text, see the LICENSE file in the repo root or https://opensource.org/licenses/MIT
+ */
+
+const js = require('@eslint/js');
+const nodePlugin = require('eslint-plugin-n');
+const eslintPlugin = require('eslint-plugin-eslint-plugin');
+const tseslint = require('typescript-eslint');
+
+module.exports = [
+    {
+        ignores: ['test/**/test.js', 'reports/**']
+    },
+    {
+        ...js.configs.recommended,
+        ...nodePlugin.configs['flat/recommended-script'],
+        files: ['**/*.js'],
+        languageOptions: {
+            ecmaVersion: 'latest',
+            sourceType: 'module',
+            globals: {
+                // jest globals
+                jest: 'readonly',
+                describe: 'readonly',
+                it: 'readonly',
+                expect: 'readonly',
+                beforeEach: 'readonly',
+                afterEach: 'readonly',
+                beforeAll: 'readonly',
+                afterAll: 'readonly'
+            }
+        },
+        rules: {
+            strict: ['error', 'global']
+        }
+    },
+    ...tseslint.configs.recommended.map((config) => ({
+        ...config,
+        files: ['**/*.d.ts']
+    })),
+    {
+        files: ['lib/rules/*.js'],
+        plugins: {
+            'eslint-plugin': eslintPlugin
+        },
+        ...eslintPlugin.configs['flat/recommended'],
+        rules: {
+            'eslint-plugin/prefer-message-ids': 'off' // Messages come straight from Komaci.
+        }
+    }
+];

eslint.config.js

@@ -5,8 +5,6 @@
  * For full license text, see the LICENSE file in the repo root or https://opensource.org/licenses/MIT
  */
 
-'use strict';
-
 module.exports = {
     displayName: 'Unit Tests',
     setupFilesAfterEnv: ['jest-extended', 'jest-chain'],

index.js

@@ -5,8 +5,6 @@
  * For full license text, see the LICENSE file in the repo root or https://opensource.org/licenses/MIT
  */
 
-'use strict';
-
 module.exports = {
     plugins: ['@salesforce/lwc-graph-analyzer'],
     parser: '@babel/eslint-parser',

jest.config.js

@@ -5,8 +5,6 @@
  * For full license text, see the LICENSE file in the repo root or https://opensource.org/licenses/MIT
  */
 
-'use strict';
-
 const bundleAnalyzer = require('../processor');
 
 module.exports = {

lib/configs/base-legacy.js

@@ -5,8 +5,6 @@
  * For full license text, see the LICENSE file in the repo root or https://opensource.org/licenses/MIT
  */
 
-'use strict';
-
 module.exports = {
     extends: ['./configs/base-legacy'],
     rules: {},

lib/configs/base.js

@@ -5,8 +5,6 @@
  * For full license text, see the LICENSE file in the repo root or https://opensource.org/licenses/MIT
  */
 
-'use strict';
-
 const baseConfig = require('./base');
 
 module.exports = {

lib/configs/recommended-legacy.js

@@ -5,8 +5,6 @@
  * For full license text, see the LICENSE file in the repo root or https://opensource.org/licenses/MIT
  */
 
-'use strict';
-
 const bundleAnalyzer = require('./processor');
 const LwcBundle = require('./lwc-bundle');
 const allRules = require('./rules');