feat: migrate to FlatConfig (#64)

Author: yoshinorin

eslint.js

@@ -1,6 +1,14 @@
-module.exports = {
-  extends: ['eslint:recommended', 'plugin:n/recommended'],
-  plugins: ['n'],
+const nodePlugin = require('eslint-plugin-n');
+const eslintJs = require('@eslint/js');
+const globals = require('globals');
+
+const commonConfig = {
+  languageOptions: {
+    globals: {
+      ...globals.node,
+      ...globals.es6,
+    },
+  },
   rules: {
     // override recommended
     'no-empty': ['error', { allowEmptyCatch: true }],
@@ -133,8 +141,10 @@ module.exports = {
     'template-curly-spacing': 'error',
     'yield-star-spacing': 'error',
   },
-  env: {
-    node: true,
-    es6: true
-  }
 };
+
+module.exports = [
+  eslintJs.configs.recommended,
+  nodePlugin.configs["flat/recommended-script"],
+  commonConfig,
+];

package.json

@@ -15,18 +15,26 @@
     "ts.js",
     "ts-test.js"
   ],
+  "exports": {
+    "./eslint": "./eslint.js",
+    "./test": "./test.js",
+    "./ts": "./ts.js",
+    "./ts-test": "./ts-test.js"
+  },
   "author": "Tommy Chen <[email protected]> (http://zespia.tw)",
   "maintainers": [
     "Abner Chou <[email protected]> (http://abnerchou.me)"
   ],
   "license": "MIT",
   "peerDependencies": {
-    "eslint": ">= 8.23.0"
+    "eslint": ">= 9.17.0"
   },
   "dependencies": {
-    "eslint-plugin-n": "^17.9.0",
-    "@typescript-eslint/eslint-plugin": "^7.15.0",
-    "@typescript-eslint/parser": "^7.15.0"
+    "@eslint/js": "^9.17.0",
+    "eslint-plugin-n": "^17.15.1",
+    "globals": "^15.14.0",
+    "typescript-eslint": "^8.19.0",
+    "eslint-plugin-mocha": "^10.5.0"
   },
   "engines": {
     "node": ">=18"

test.js

@@ -1,9 +1,23 @@
-module.exports = {
-  extends: './eslint.js',
+const jsConfig = require('./eslint.js');
+const globals = require('globals');
+const mochaPlugin = require('eslint-plugin-mocha');
+
+const testConfig = {
+  ...mochaPlugin.configs.flat.recommended,
+  languageOptions: {
+    globals: {
+      ...globals.mocha
+    },
+  },
   rules: {
-    'no-unused-expressions': 'off'
+    'no-unused-expressions': 0,
+    "mocha/no-mocha-arrows": 0,
+    "mocha/handle-done-callback": 0,
+    "mocha/max-top-level-suites": 0,
   },
-  env: {
-    mocha: true
-  }
 };
+
+module.exports = [
+  ...jsConfig,
+  testConfig
+];

ts-test.js

@@ -1,9 +1,18 @@
-module.exports = {
-  extends: './ts.js',
+const tsConfig = require('./ts.js');
+const globals = require('globals');
+
+const tsTestConfig = {
+  languageOptions: {
+    globals: {
+      ...globals.mocha
+    },
+  },
   rules: {
     'no-unused-expressions': 'off'
   },
-  env: {
-    mocha: true
-  }
 };
+
+module.exports = [
+  ...tsConfig,
+  tsTestConfig,
+];

ts.js

@@ -1,12 +1,17 @@
-module.exports = {
-  parser: '@typescript-eslint/parser',
-  plugins: ['@typescript-eslint'],
-  extends: [
-    './eslint.js',
-    'plugin:@typescript-eslint/recommended'
-  ],
+const tsEslint = require('typescript-eslint');
+const nodePlugin = require('eslint-plugin-n');
+const jsConfig = require('./eslint.js');
+
+const nodeConfig = {
   rules: {
     'n/no-unsupported-features/es-syntax': ['error', { 'ignores': ['modules'] }],
     'n/no-missing-import': ['error', { 'tryExtensions': ['.js', '.ts'] }]
-  }
-};
+  },
+}
+
+module.exports = [].concat(
+  jsConfig,
+  nodePlugin.configs["flat/mixed-esm-and-cjs"],
+  ...tsEslint.configs.recommended,
+  nodeConfig,
+);