feat: migrate to FlatConfig

eslint.js

@@ -1,6 +1,16 @@
-module.exports = {
-  extends: ['eslint:recommended', 'plugin:n/recommended'],
-  plugins: ['n'],
+import nodePlugin from 'eslint-plugin-n';
+import eslintJs from '@eslint/js';
+
+const commonConfig = {
+  languageOptions: {
+    globals: {
+      ...globals.node,
+      ...globals.es6,
+    },
+  },
+  plugins: {
+    nodePlugin,
+  },
   rules: {
     // override recommended
     'no-empty': ['error', { allowEmptyCatch: true }],
@@ -133,8 +143,10 @@ module.exports = {
     'template-curly-spacing': 'error',
     'yield-star-spacing': 'error',
   },
-  env: {
-    node: true,
-    es6: true
-  }
 };
+
+export default [
+  eslintJs.configs.recommended,
+  ...nodePlugin.configs.recommended,
+  commonConfig,
+];

package.json

@@ -21,12 +21,12 @@
   ],
   "license": "MIT",
   "peerDependencies": {
-    "eslint": ">= 8.23.0"
+    "eslint": ">= 9.10.0"
   },
   "dependencies": {
-    "eslint-plugin-n": "^17.9.0",
-    "@typescript-eslint/eslint-plugin": "^7.15.0",
-    "@typescript-eslint/parser": "^7.15.0"
+    "@eslint/js": "^9.10.0",
+    "eslint-plugin-n": "^17.10.3",
+    "typescript-eslint": "^8.6.0"
   },
   "engines": {
     "node": ">=18"

test.js

@@ -1,9 +1,17 @@
-module.exports = {
-  extends: './eslint.js',
+import eslint from './eslint';
+
+const testConfig = {
+  languageOptions: {
+    globals: {
+      ...globals.mocha
+    },
+  },
   rules: {
     'no-unused-expressions': 'off'
   },
-  env: {
-    mocha: true
-  }
 };
+
+export default [
+  eslint,
+  testConfig,
+];

ts-test.js

@@ -1,9 +1,17 @@
-module.exports = {
-  extends: './ts.js',
+import tsJs from './tsts';
+
+const tsTestConfig = {
+  languageOptions: {
+    globals: {
+      ...globals.mocha
+    },
+  },
   rules: {
     'no-unused-expressions': 'off'
   },
-  env: {
-    mocha: true
-  }
 };
+
+export default [
+  tsJs,
+  tsTestConfig,
+];

ts.js

@@ -1,12 +1,29 @@
-module.exports = {
-  parser: '@typescript-eslint/parser',
-  plugins: ['@typescript-eslint'],
-  extends: [
-    './eslint.js',
-    'plugin:@typescript-eslint/recommended'
-  ],
+import tseslint from 'typescript-eslint';
+import nodePlugin from 'eslint-plugin-n';
+import eslint from './eslint';
+
+const nodeConfig = {
   rules: {
     'n/no-unsupported-features/es-syntax': ['error', { 'ignores': ['modules'] }],
     'n/no-missing-import': ['error', { 'tryExtensions': ['.js', '.ts'] }]
-  }
-};
+  },
+}
+
+const tslintConfig = tseslint.config({
+  plugins: {
+    '@typescript-eslint': tseslint.plugin,
+  },
+  languageOptions: {
+    parser: tseslint.parser,
+    parserOptions: {
+      project: true,
+    },
+  },
+});
+
+export default [
+  eslint,
+  ...nodePlugin.configs["flat/mixed-esm-and-cjs"],
+  tslintConfig,
+  nodeConfig,
+];