Migrate to flat config (eslint v9+)

.github/workflows/test.yml

@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node: [ 14, 16, 18 ]
+        node: [ 18, 20, 22 ]
     steps:
       - uses: actions/checkout@v3
       - uses: actions/setup-node@v3

README.md

@@ -12,13 +12,10 @@ npm install --save-dev eslint-plugin-require-extensions
 ```
 
 2. Edit `.eslintrc`
-```json
+```js
 {
     "extends": [
-        "plugin:require-extensions/recommended"
-    ],
-    "plugins": [
-        "require-extensions"
+        requireExtensions.configs.recommended,
     ]
 }
 ```

eslint.config.mjs

@@ -0,0 +1,15 @@
+import { defineConfig } from "eslint/config";
+import requireExtensions from "./index.js";
+
+export default defineConfig([{
+    extends: [
+        requireExtensions.configs.recommended,
+    ],
+    languageOptions: {
+        ecmaVersion: 2020,
+        sourceType: "module",
+    },
+    ignores: [
+        "index.js"
+    ]
+}]);

example/index.js

@@ -2,6 +2,8 @@ import 'foo';
 import './foo.js';
 import './foo.json';
 import json from './foo.json?raw';
+import './bar/index.js';
+
 // eslint-disable-next-line require-extensions/require-extensions
 import queryNoExt from './foo?raw';
 // eslint-disable-next-line require-extensions/require-extensions

index.js

@@ -1,46 +1,53 @@
-const { existsSync, lstatSync } = require('fs');
-const { dirname, resolve } = require('path');
+import { existsSync, lstatSync } from 'fs';
+import { dirname, resolve } from 'path';
 
-module.exports = {
-    configs: {
-        recommended: {
-            plugins: ['require-extensions'],
-            rules: {
-                'require-extensions/require-extensions': 'error',
-                'require-extensions/require-index': 'error',
-            },
+const requireExtensions = {
+	configs: {},
+	rules: {},
+	processors: {},
+};
+
+Object.assign(requireExtensions.configs, {
+    recommended: {
+        plugins: {
+            'require-extensions': requireExtensions,
+        },
+        rules: {
+            'require-extensions/require-extensions': 'error',
+            'require-extensions/require-index': 'error',
         },
     },
-    rules: {
-        'require-extensions': rule((context, node, path) => {
-            if (!existsSync(path)) {
-                let fix;
-                if (!node.source.value.includes('?')) {
-                    fix = (fixer) => {
-                        return fixer.replaceText(node.source, `'${node.source.value}.js'`);
-                    };
-                }
+});
 
-                context.report({
-                    node,
-                    message: 'Relative imports and exports must end with .js',
-                    fix,
-                });
-            }
-        }),
-        'require-index': rule((context, node, path) => {
-            if (existsSync(path) && lstatSync(path).isDirectory()) {
-                context.report({
-                    node,
-                    message: 'Directory paths must end with index.js',
-                    fix(fixer) {
-                        return fixer.replaceText(node.source, `'${node.source.value}/index.js'`);
-                    },
-                });
+Object.assign(requireExtensions.rules, {
+    'require-extensions': rule((context, node, path) => {
+        if (!existsSync(path)) {
+            let fix;
+            if (!node.source.value.includes('?')) {
+                fix = (fixer) => {
+                    return fixer.replaceText(node.source, `'${node.source.value.replace(/(\.|\.j)$/, '')}.js'`);
+                };
             }
-        }),
-    },
-};
+
+            context.report({
+                node,
+                message: 'Relative imports and exports must end with .js',
+                fix,
+            });
+        }
+    }),
+    'require-index': rule((context, node, path) => {
+        if (existsSync(path) && lstatSync(path).isDirectory()) {
+            context.report({
+                node,
+                message: 'Directory paths must end with index.js',
+                fix(fixer) {
+                    return fixer.replaceText(node.source, `'${node.source.value}/index.js'`);
+                },
+            });
+        }
+    }),
+});
 
 function rule(check) {
     return {
@@ -67,3 +74,5 @@ function rule(check) {
         },
     };
 }
+
+export default requireExtensions;