[CONFIG] Transitional config for ESlint 9.0.0 (backward compatibility)

airbnb-base not fully supported yet: airbnb/javascript#2804

Author: Gonzalo Diaz

Diff for: .eslintrc

@@ -0,0 +1,97 @@
+// eslint.config.js
+
+import { FlatCompat } from '@eslint/eslintrc';
+import js from '@eslint/js';
+import path from 'path';
+import { fileURLToPath } from 'url';
+
+// mimic CommonJS variables -- not needed if using CommonJS
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
+
+const compat = new FlatCompat({
+  baseDirectory: __dirname, // optional; default: process.cwd()
+  resolvePluginsRelativeTo: __dirname, // optional
+  recommendedConfig: js.configs.recommended, // optional unless you're using "eslint:recommended"
+  allConfig: js.configs.all // optional unless you're using "eslint:all"
+});
+
+export default [
+  // translate an entire config
+  ...compat.config({
+    //   ╔═╗╔═╗╦  ╦╔╗╔╔╦╗┬─┐┌─┐
+    //   ║╣ ╚═╗║  ║║║║ ║ ├┬┘│
+    //  o╚═╝╚═╝╩═╝╩╝╚╝ ╩ ┴└─└─┘
+    // A set of basic code conventions (similar to a .jshintrc file) designed to
+    // and encourage quality and consistency across your Sails app's code base.
+    // These rules are checked against automatically any time you run `npm test`.
+    //
+    // > Note: If you're using mocha, you'll want to add an extra override file to your
+    // > `test/` folder so that eslint will tolerate mocha-specific globals like `before`
+    // > and `describe`.
+    //
+    // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+    // For more information about any of the rules below, check out the relevant
+    // reference page on eslint.org.  For example, to get details on "no-sequences",
+    // you would visit `http://eslint.org/docs/rules/no-sequences`.
+    // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+
+    'env': {
+      'node': true,
+      'es6': true,
+      'es2020': true
+      // "jest/globals": true
+    },
+
+    'parser': '@babel/eslint-parser',
+
+    'parserOptions': {
+      'requireConfigFile': false,
+      'ecmaVersion': 2022,
+      'sourceType': 'module'
+      // "babelOptions": {
+      //   "parserOpts": {
+      //     "plugins": ["importAssertions"]
+      //   }
+      // }
+    },
+
+    'globals': {
+      // If "no-undef" is enabled below and your app uses globals, be sure to list all
+      // relevant globals below (including the globalIds of models, if appropriate):
+      // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+      // ...and any other backend globals (e.g. `"Organization": true`)
+      // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+    },
+
+    'plugins': [
+      // "import",
+      'jest',
+      'prettier'
+    ],
+
+    'extends': [
+      'eslint:recommended',
+      // "airbnb-base",
+      'prettier',
+      // "plugin:import/errors",
+      // "plugin:import/warnings",
+      'plugin:jest/all'
+    ],
+
+    'rules': {
+      'prettier/prettier': ['warn']
+
+      // // CUSTOM OVERRIDES
+      // // TODO: remove no-restricted-syntax override and replace for...Of due
+      // /// "iterators/generators require regenerator-runtime, which is too heavyweight for this guide to allow them. Separately, loops should be avoided in favor of array iterations."
+      // "no-restricted-syntax":           0,
+      // "no-console":                     "off",
+      // "no-underscore-dangle":           0,
+      // "no-plusplus":                    ["error", { "allowForLoopAfterthoughts": true }],
+      // "import/no-unresolved":           [2, {"commonjs": true, "amd": true}],
+      // "import/extensions":              ["error", { "js": "always", "json": "always"}],
+      // "import/no-extraneous-dependencies": ["error", {"devDependencies": ["**/*.test.js", "**/*.bruteforce-test.js", "**/*.spec.js"]}]
+    }
+  })
+];