Support flat config

packages/eslint-config-airbnb-base/README.md

@@ -62,6 +62,28 @@ Our default export contains all of our ESLint rules, including ECMAScript 6+. It
 
 2. Add `"extends": "airbnb-base"` to your .eslintrc.
 
+  If using **flat config**, add `eslint-config-airbnb-base/flat` to `eslint.config.mjs` / `eslint.config.cjs` / `eslint.config.js` :
+
+  ```js
+  // eslint.config.cjs
+  const airbnbBase = require('eslint-config-airbnb-base/flat');
+
+  module.exports = [
+    ...airbnbBase,
+    // ......
+  ];
+  ```
+
+  ```js
+  // eslint.config.mjs
+  import airbnbBase from 'eslint-config-airbnb-base/flat';
+
+  export default [
+    ...airbnbBase,
+    // ......
+  ];
+  ```
+
 ### eslint-config-airbnb-base/legacy
 
 Lints ES5 and below. Requires `eslint` and `eslint-plugin-import`.

packages/eslint-config-airbnb-base/eslint.config.js

@@ -0,0 +1,12 @@
+module.exports = [
+  ...require('./flat'),
+  {
+    rules: {
+      // disable requiring trailing commas because it might be nice to revert to
+      // being JSON at some point, and I don't want to make big changes now.
+      "comma-dangle": 0,
+
+      "max-len": 0
+    }
+  }
+];

packages/eslint-config-airbnb-base/flat.js

@@ -0,0 +1,21 @@
+module.exports = [
+  ...([
+    './rules/flat/best-practices',
+    './rules/flat/errors',
+    './rules/flat/node',
+    './rules/flat/style',
+    './rules/flat/variables',
+    './rules/flat/es6',
+    './rules/flat/imports',
+    './rules/flat/strict',
+  ].reduce((p, c) => p.concat(require(c)), [])), // eslint-disable-line global-require, import/no-dynamic-require
+  {
+    languageOptions: {
+      parserOptions: {
+        ecmaVersion: 2018,
+        sourceType: 'module'
+      }
+    },
+    rules: {}
+  }
+];

packages/eslint-config-airbnb-base/package.json

@@ -5,6 +5,7 @@
   "main": "index.js",
   "exports": {
     ".": "./index.js",
+    "./flat": "./flat.js",
     "./legacy": "./legacy.js",
     "./whitespace": "./whitespace.js",
     "./rules/best-practices": "./rules/best-practices.js",
@@ -15,6 +16,22 @@
     "./rules/imports": "./rules/imports.js",
     "./rules/strict": "./rules/strict.js",
     "./rules/variables": "./rules/variables.js",
+    "./rules/base/best-practices": "./rules/base/best-practices.js",
+    "./rules/base/es6": "./rules/base/es6.js",
+    "./rules/base/node": "./rules/base/node.js",
+    "./rules/base/style": "./rules/base/style.js",
+    "./rules/base/errors": "./rules/base/errors.js",
+    "./rules/base/imports": "./rules/base/imports.js",
+    "./rules/base/strict": "./rules/base/strict.js",
+    "./rules/base/variables": "./rules/base/variables.js",
+    "./rules/flat/best-practices": "./rules/flat/best-practices.js",
+    "./rules/flat/es6": "./rules/flat/es6.js",
+    "./rules/flat/node": "./rules/flat/node.js",
+    "./rules/flat/style": "./rules/flat/style.js",
+    "./rules/flat/errors": "./rules/flat/errors.js",
+    "./rules/flat/imports": "./rules/flat/imports.js",
+    "./rules/flat/strict": "./rules/flat/strict.js",
+    "./rules/flat/variables": "./rules/flat/variables.js",
     "./package.json": "./package.json"
   },
   "scripts": {
@@ -72,21 +89,22 @@
     "babel-preset-airbnb": "^4.5.0",
     "babel-tape-runner": "^3.0.0",
     "eclint": "^2.8.1",
-    "eslint": "^7.32.0 || ^8.2.0",
-    "eslint-find-rules": "^4.1.0",
+    "eslint": "^7.32.0 || ^8.2.0 || >= 9",
+    "eslint-find-rules": "^5.0.0",
     "eslint-plugin-import": "^2.30.0",
     "in-publish": "^2.0.1",
     "safe-publish-latest": "^2.0.0",
     "tape": "^5.9.0"
   },
   "peerDependencies": {
-    "eslint": "^7.32.0 || ^8.2.0",
+    "eslint": "^7.32.0 || ^8.2.0 || >= 9",
     "eslint-plugin-import": "^2.30.0"
   },
   "engines": {
     "node": "^10.12.0 || >=12.0.0"
   },
   "dependencies": {
-    "confusing-browser-globals": "^1.0.11"
+    "confusing-browser-globals": "^1.0.11",
+    "globals": "^15.14.0"
   }
 }