feat: 🔨 prep for eslint v9

eslint.config.js

@@ -0,0 +1,76 @@
+const typescriptEslintParser = require('@typescript-eslint/parser');
+const eslintPluginSonarjs = require('eslint-plugin-sonarjs');
+const { FlatCompat } = require('@eslint/eslintrc');
+const globals = require('globals');
+const js = require('@eslint/js');
+
+const compat = new FlatCompat({
+  recommendedConfig: js.configs.recommended,
+  baseDirectory: __dirname,
+});
+
+module.exports = [
+  ...compat.extends('./eslint.vite.js'),
+  js.configs.recommended,
+  ...compat.extends(
+    'plugin:compat/recommended',
+    'plugin:@typescript-eslint/recommended',
+    'plugin:import/recommended',
+    'plugin:import/typescript',
+    'plugin:sonarjs/recommended',
+    'plugin:prettier/recommended',
+  ),
+  { plugins: { sonarjs: eslintPluginSonarjs } },
+  {
+    languageOptions: {
+      parser: typescriptEslintParser,
+      parserOptions: {
+        ecmaVersion: 'latest',
+        sourceType: 'module',
+      },
+      globals: {
+        ...globals.node,
+        ...globals.browser,
+        ...globals.es6,
+        ...globals.jest,
+      },
+    },
+  },
+  {
+    rules: {
+      'no-unused-expressions': 'off',
+      '@typescript-eslint/no-useless-escape': 'off',
+      '@typescript-eslint/no-explicit-any': 'off',
+      '@typescript-eslint/no-empty-function': 'off',
+      '@typescript-eslint/explicit-module-boundary-types': 'off',
+      '@typescript-eslint/explicit-function-return-type': 'off',
+      '@typescript-eslint/no-use-before-define': 'off',
+      '@typescript-eslint/no-unused-vars': 'warn',
+      'import/no-named-as-default': 'off',
+      'import/no-named-as-default-member': 'off',
+      'import/no-unresolved': 'off',
+      'import/namespace': 'off',
+      'sonarjs/cognitive-complexity': ['off', 100],
+      'sonarjs/no-all-duplicated-branches': 'warn',
+      'sonarjs/no-collapsible-if': 'warn',
+      'sonarjs/no-collection-size-mischeck': 'warn',
+      'sonarjs/no-duplicate-string': 'warn',
+      'sonarjs/no-duplicated-branches': 'warn',
+      'sonarjs/no-empty-collection': 'warn',
+      'sonarjs/no-extra-arguments': 'warn',
+      'sonarjs/no-gratuitous-expressions': 'warn',
+      'sonarjs/no-identical-expressions': 'warn',
+      'sonarjs/no-identical-functions': 'warn',
+      'sonarjs/no-ignored-return': 'off',
+      'sonarjs/no-misleading-array-reverse': 'off',
+      'sonarjs/no-nested-template-literals': 'warn',
+      'sonarjs/no-redundant-boolean': 'warn',
+      'sonarjs/no-redundant-jump': 'warn',
+      'sonarjs/no-small-switch': 'warn',
+      'sonarjs/no-unused-collection': 'warn',
+      'sonarjs/prefer-object-literal': 'warn',
+      'sonarjs/prefer-single-boolean-return': 'warn',
+    },
+  },
+  { ignores: ['node_modules/', 'dist/', 'coverage/', '**/scratch/', 'server/', '**/*.test.ts'] },
+];

eslint.vite.js

@@ -0,0 +1,53 @@
+module.exports = {
+  env: { browser: true, es2020: true },
+  extends: [
+    'eslint:recommended',
+    'plugin:@typescript-eslint/recommended',
+    'plugin:import/recommended',
+    'plugin:sonarjs/recommended',
+  ],
+  parser: '@typescript-eslint/parser',
+  settings: {
+    'import/resolver': {
+      node: {
+        paths: ['src'],
+        extensions: ['.js', '.ts'],
+      },
+    },
+  },
+  plugins: ['@typescript-eslint', 'sonarjs'],
+  rules: {
+    '@typescript-eslint/explicit-function-return-type': 'off',
+    '@typescript-eslint/explicit-module-boundary-types': 'off',
+    '@typescript-eslint/no-empty-function': 'error',
+    '@typescript-eslint/no-empty-interface': 'error',
+    '@typescript-eslint/no-explicit-any': 'warn',
+    '@typescript-eslint/no-unused-expressions': 'off',
+    '@typescript-eslint/no-unused-vars': ['error', { ignoreRestSiblings: true }],
+    '@typescript-eslint/no-use-before-define': 'off',
+    '@typescript-eslint/no-useless-escape': 'off',
+    'array-callback-return': 'warn',
+    complexity: ['off', 25],
+    eqeqeq: ['warn', 'smart'],
+    'import/named': 'off',
+    'import/no-duplicates': 'error',
+    'import/no-unresolved': 'off',
+    'no-console': 'off',
+    'no-debugger': 'error',
+    'no-duplicate-imports': 0,
+    'no-nested-ternary': 'warn',
+    'no-unneeded-ternary': 'warn',
+    'no-unused-vars': 'off',
+    'sonarjs/cognitive-complexity': ['warn', 15],
+    'sonarjs/no-collapsible-if': 'warn',
+    'sonarjs/no-duplicate-string': 'warn',
+    'sonarjs/no-duplicated-branches': 'warn',
+    'sonarjs/no-ignored-return': 'off',
+    'sonarjs/no-nested-template-literals': 'warn',
+    'sonarjs/no-redundant-boolean': 'warn',
+    'sonarjs/no-redundant-jump': 'warn',
+    'sonarjs/no-small-switch': 'warn',
+    'sonarjs/no-unused-collection': 'warn',
+    'sonarjs/prefer-single-boolean-return': 'warn',
+  },
+};

package.json

@@ -157,10 +157,10 @@
     "eslint-plugin-compat": "4.2.0",
     "eslint-plugin-import": "2.29.1",
     "eslint-plugin-prettier": "5.1.3",
-    "eslint-plugin-react": "7.34.1",
     "eslint-plugin-sonarjs": "^0.25.0",
     "esm": "3.2.25",
     "fs-extra": "11.2.0",
+    "globals": "^15.0.0",
     "husky": "9.0.11",
     "jest": "29.7.0",
     "lint-staged": "15.2.2",