feature: @putout/plugin-eslint: remove-parser-options: add

Author: coderaiser

packages/plugin-eslint/README.md

@@ -38,6 +38,7 @@ npm i @putout/plugin-eslint -D
 - ✅ [remove-overrides-with-empty-rules](#remove-overrides-with-empty-rules);
 - ✅ [remove-useless-slice](#remove-useless-slice);
 - ✅ [remove-useless-properties](#remove-useless-properties);
+- ✅ [remove-parser-options](#remove-parser-options);
 
 ## Config
 
@@ -52,21 +53,22 @@ npm i @putout/plugin-eslint -D
         }],
         "eslint/apply-safe-align": "on",
         "eslint/apply-match-to-flat": "on",
+        "eslint/declare": "on",
         "eslint/move-putout-to-end-of-extends": "on",
         "eslint/convert-export-match-to-decleration": "on",
         "eslint/convert-files-to-array": "on",
         "eslint/convert-ide-to-safe": "on",
         "eslint/convert-require-to-import": "on",
         "eslint/convert-node-to-n": "on",
-        "eslint/declare": "on",
+        "eslint/convert-plugins-array-to-object": "on",
+        "eslint/convert-rc-to-flat": "off",
         "eslint/remove-no-missing": "on",
         "eslint/remove-no-unpublished-require": "on",
         "eslint/remove-no-unsupported-features": "on",
         "eslint/remove-overrides-with-empty-rules": "on",
         "eslint/remove-useless-slice": "on",
         "eslint/remove-useless-properties": "on",
-        "eslint/convert-plugins-array-to-object": "on",
-        "eslint/convert-rc-to-flat": "off"
+        "eslint/remove-parser-options": "on"
     }
 }
 ```
@@ -458,6 +460,38 @@ And ofcourse remove only elements with empty `rules`:
 };
 ```
 
+## remove-parser-options
+
+> In flat config files, the `globals`, and `parserOptions` are consolidated under the `languageOptions` key;
+>
+> (c) [eslint.org](https://eslint.org/docs/latest/use/configure/migration-guide#configuring-language-options)
+
+Check out in 🐊[**Putout Editor**](https://putout.cloudcmd.io/#/gist/d6b1cf2681ec6829f11aa2a5f0b60538/199de7e426b1ebeb7f0b242778dfce3fd345b2ae)
+
+### ❌ Example of incorrect code
+
+```js
+const ruleTester = new RuleTester({
+    languageOptions: {
+        parserOptions: {
+            ecmaVersion: 2025,
+            sourceType: 'module',
+        },
+    },
+});
+```
+
+### ✅ Example of correct code
+
+```js
+const ruleTester = new RuleTester({
+    languageOptions: {
+        ecmaVersion: 2025,
+        sourceType: 'module',
+    },
+});
+```
+
 ## convert-node-to-n
 
 `eslint-plugin-node` [is no longer supported](https://github.com/mysticatea/eslint-plugin-node/issues/300). Better to use [`eslint-plugin-n`](https://github.com/weiran-zsd/eslint-plugin-node).
@@ -516,7 +550,7 @@ export default x.slice();
 module.exports = x.slice();
 ```
 
-## ✅ Example of correct code
+### ✅ Example of correct code
 
 ```js
 export default x;

packages/plugin-eslint/lib/index.js

@@ -21,6 +21,7 @@ const convertPluginsArrayToObject = require('./convert-plugins-array-to-object')
 const removeUselessProperties = require('./remove-useless-properties');
 const applyIgnores = require('./apply-ignores');
 const applyCreateEslintConfig = require('./apply-create-eslint-config');
+const removeParserOptions = require('./remove-parser-options');
 
 module.exports.rules = {
     'add-putout': addPutout,
@@ -44,4 +45,5 @@ module.exports.rules = {
     'remove-useless-properties': removeUselessProperties,
     'apply-ignores': ['off', applyIgnores],
     'apply-create-eslint-config': applyCreateEslintConfig,
+    'remove-parser-options': removeParserOptions,
 };

packages/plugin-eslint/lib/remove-parser-options/fixture/babel-options.js

@@ -0,0 +1,12 @@
+module.exports = createESLintConfig([
+    safeAlign, {
+        files: ['*.md{js}'],
+        languageOptions: {
+            parserOptions: {
+                babelOptions: {
+                    sourceType: 'script',
+                },
+            },
+        },
+    },
+]);

packages/plugin-eslint/lib/remove-parser-options/fixture/no-language-options.js

@@ -0,0 +1,6 @@
+module.exports = {
+    parserOptions: {
+        ecmaVersion: 2025,
+        sourceType: 'module',
+    },
+};

packages/plugin-eslint/lib/remove-parser-options/fixture/remove-parser-options-fix.js

@@ -0,0 +1,6 @@
+const ruleTester = new RuleTester({
+    languageOptions: {
+        ecmaVersion: 2025,
+        sourceType: 'module',
+    },
+});

packages/plugin-eslint/lib/remove-parser-options/fixture/remove-parser-options.js

@@ -0,0 +1,8 @@
+const ruleTester = new RuleTester({
+     languageOptions: {
+         parserOptions: {
+             ecmaVersion: 2025,
+             sourceType: 'module',
+         },
+     },
+ });

packages/plugin-eslint/lib/remove-parser-options/index.js

@@ -0,0 +1,34 @@
+'use strict';
+
+const {operator} = require('putout');
+const {
+    traverseProperties,
+    replaceWith,
+} = operator;
+
+module.exports.report = () => `Avoid "parserOptions" in FlatConfig`;
+
+module.exports.fix = (path) => {
+    replaceWith(path.parentPath, path.node.value);
+};
+
+module.exports.traverse = ({push}) => ({
+    __object(path) {
+        const [languageOptionsPath] = traverseProperties(path, 'languageOptions');
+        
+        if (!languageOptionsPath)
+            return;
+        
+        const [parserOptionsPath] = traverseProperties(languageOptionsPath, 'parserOptions');
+        
+        if (!parserOptionsPath)
+            return;
+        
+        const [babelOptionsPath] = traverseProperties(parserOptionsPath, 'babelOptions');
+        
+        if (babelOptionsPath)
+            return;
+        
+        push(parserOptionsPath);
+    },
+});

packages/plugin-eslint/lib/remove-parser-options/index.spec.js

@@ -0,0 +1,30 @@
+'use strict';
+
+const {createTest} = require('@putout/test');
+const plugin = require('.');
+
+const test = createTest(__dirname, {
+    plugins: [
+        ['remove-parser-options', plugin],
+    ],
+});
+
+test('eslint: remove-parser-options: report', (t) => {
+    t.report('remove-parser-options', `Avoid "parserOptions" in FlatConfig`);
+    t.end();
+});
+
+test('eslint: remove-parser-options: transform', (t) => {
+    t.transform('remove-parser-options');
+    t.end();
+});
+
+test('eslint: remove-parser-options: no report: no-language-options', (t) => {
+    t.noReport('no-language-options');
+    t.end();
+});
+
+test('eslint: remove-parser-options: no report: babel-options', (t) => {
+    t.noReport('babel-options');
+    t.end();
+});

packages/plugin-eslint/test/eslint.js

@@ -118,3 +118,8 @@ test('plugin-eslint: transform: apply-create-eslint-config', (t) => {
     t.transform('apply-create-eslint-config');
     t.end();
 });
+
+test('plugin-eslint: transform: remove-parser-options', (t) => {
+    t.transform('remove-parser-options');
+    t.end();
+});

packages/plugin-eslint/test/fixture/remove-parser-options-fix.js

@@ -0,0 +1,6 @@
+const ruleTester = new RuleTester({
+    languageOptions: {
+        ecmaVersion: 2025,
+        sourceType: 'module',
+    },
+});