[Fix] use same plugin instance in flat configs

Author: mdjermanovic

configs/all.js

@@ -1,49 +1,13 @@
 'use strict';
 
-const fromEntries = require('object.fromentries');
-const entries = require('object.entries');
+const plugin = require('../index');
 
-const allRules = require('../lib/rules');
-
-function filterRules(rules, predicate) {
-  return fromEntries(entries(rules).filter((entry) => predicate(entry[1])));
-}
-
-/**
- * @param {object} rules - rules object mapping rule name to rule module
- * @returns {Record<string, 2>}
- */
-function configureAsError(rules) {
-  return fromEntries(Object.keys(rules).map((key) => [`react/${key}`, 2]));
-}
-
-const activeRules = filterRules(allRules, (rule) => !rule.meta.deprecated);
-const activeRulesConfig = configureAsError(activeRules);
-
-const deprecatedRules = filterRules(allRules, (rule) => rule.meta.deprecated);
+const legacyConfig = plugin.configs.all;
 
 module.exports = {
-  plugins: {
-    /**
-     * @type {{
-     *   deprecatedRules: Record<string, import('eslint').Rule.RuleModule>,
-     *   rules: Record<string, import('eslint').Rule.RuleModule>,
-     * }}
-     */
-    react: {
-      deprecatedRules,
-      rules: allRules,
-    },
-  },
-  rules: activeRulesConfig,
-  languageOptions: {
-    parserOptions: {
-      ecmaFeatures: {
-        jsx: true,
-      },
-    },
-  },
+  plugins: { react: plugin },
+  rules: legacyConfig.rules,
+  languageOptions: { parserOptions: legacyConfig.parserOptions },
 };
 
-// this is so the `languageOptions` property won't be warned in the new config system
 Object.defineProperty(module.exports, 'languageOptions', { enumerable: false });

configs/jsx-runtime.js

@@ -1,18 +1,13 @@
 'use strict';
 
-const all = require('./all');
+const plugin = require('../index');
 
-module.exports = Object.assign({}, all, {
-  languageOptions: Object.assign({}, all.languageOptions, {
-    parserOptions: Object.assign({}, all.languageOptions.parserOptions, {
-      jsxPragma: null, // for @typescript/eslint-parser
-    }),
-  }),
-  rules: {
-    'react/react-in-jsx-scope': 0,
-    'react/jsx-uses-react': 0,
-  },
-});
+const legacyConfig = plugin.configs['jsx-runtime'];
+
+module.exports = {
+  plugins: { react: plugin },
+  rules: legacyConfig.rules,
+  languageOptions: { parserOptions: legacyConfig.parserOptions },
+};
 
-// this is so the `languageOptions` property won't be warned in the new config system
 Object.defineProperty(module.exports, 'languageOptions', { enumerable: false });

configs/recommended.js

@@ -1,34 +1,13 @@
 'use strict';
 
-const all = require('./all');
+const plugin = require('../index');
 
-module.exports = Object.assign({}, all, {
-  languageOptions: all.languageOptions,
-  rules: {
-    'react/display-name': 2,
-    'react/jsx-key': 2,
-    'react/jsx-no-comment-textnodes': 2,
-    'react/jsx-no-duplicate-props': 2,
-    'react/jsx-no-target-blank': 2,
-    'react/jsx-no-undef': 2,
-    'react/jsx-uses-react': 2,
-    'react/jsx-uses-vars': 2,
-    'react/no-children-prop': 2,
-    'react/no-danger-with-children': 2,
-    'react/no-deprecated': 2,
-    'react/no-direct-mutation-state': 2,
-    'react/no-find-dom-node': 2,
-    'react/no-is-mounted': 2,
-    'react/no-render-return-value': 2,
-    'react/no-string-refs': 2,
-    'react/no-unescaped-entities': 2,
-    'react/no-unknown-property': 2,
-    'react/no-unsafe': 0,
-    'react/prop-types': 2,
-    'react/react-in-jsx-scope': 2,
-    'react/require-render-return': 2,
-  },
-});
+const legacyConfig = plugin.configs.recommended;
+
+module.exports = {
+  plugins: { react: plugin },
+  rules: legacyConfig.rules,
+  languageOptions: { parserOptions: legacyConfig.parserOptions },
+};
 
-// this is so the `languageOptions` property won't be warned in the new config system
 Object.defineProperty(module.exports, 'languageOptions', { enumerable: false });

index.js

@@ -1,31 +1,89 @@
 'use strict';
 
-const configAll = require('./configs/all');
-const configRecommended = require('./configs/recommended');
-const configRuntime = require('./configs/jsx-runtime');
+const fromEntries = require('object.fromentries');
+const entries = require('object.entries');
 
 const allRules = require('./lib/rules');
 
+function filterRules(rules, predicate) {
+  return fromEntries(entries(rules).filter((entry) => predicate(entry[1])));
+}
+
+/**
+ * @param {object} rules - rules object mapping rule name to rule module
+ * @returns {Record<string, 2>}
+ */
+function configureAsError(rules) {
+  return fromEntries(Object.keys(rules).map((key) => [`react/${key}`, 2]));
+}
+
+const activeRules = filterRules(allRules, (rule) => !rule.meta.deprecated);
+const activeRulesConfig = configureAsError(activeRules);
+
+const deprecatedRules = filterRules(allRules, (rule) => rule.meta.deprecated);
+
 // for legacy config system
 const plugins = [
   'react',
 ];
 
 module.exports = {
-  deprecatedRules: configAll.plugins.react.deprecatedRules,
+  deprecatedRules,
   rules: allRules,
   configs: {
-    recommended: Object.assign({}, configRecommended, {
-      parserOptions: configRecommended.languageOptions.parserOptions,
+    recommended: {
       plugins,
-    }),
-    all: Object.assign({}, configAll, {
-      parserOptions: configAll.languageOptions.parserOptions,
+      parserOptions: {
+        ecmaFeatures: {
+          jsx: true,
+        },
+      },
+      rules: {
+        'react/display-name': 2,
+        'react/jsx-key': 2,
+        'react/jsx-no-comment-textnodes': 2,
+        'react/jsx-no-duplicate-props': 2,
+        'react/jsx-no-target-blank': 2,
+        'react/jsx-no-undef': 2,
+        'react/jsx-uses-react': 2,
+        'react/jsx-uses-vars': 2,
+        'react/no-children-prop': 2,
+        'react/no-danger-with-children': 2,
+        'react/no-deprecated': 2,
+        'react/no-direct-mutation-state': 2,
+        'react/no-find-dom-node': 2,
+        'react/no-is-mounted': 2,
+        'react/no-render-return-value': 2,
+        'react/no-string-refs': 2,
+        'react/no-unescaped-entities': 2,
+        'react/no-unknown-property': 2,
+        'react/no-unsafe': 0,
+        'react/prop-types': 2,
+        'react/react-in-jsx-scope': 2,
+        'react/require-render-return': 2,
+      },
+    },
+    all: {
       plugins,
-    }),
-    'jsx-runtime': Object.assign({}, configRuntime, {
-      parserOptions: configRuntime.languageOptions.parserOptions,
+      parserOptions: {
+        ecmaFeatures: {
+          jsx: true,
+        },
+      },
+      rules: activeRulesConfig,
+    },
+    'jsx-runtime': {
       plugins,
-    }),
+      parserOptions: {
+        ecmaFeatures: {
+          jsx: true,
+        },
+        jsxPragma: null, // for @typescript/eslint-parser
+      },
+      rules: {
+        'react/react-in-jsx-scope': 0,
+        'react/jsx-uses-react': 0,
+      },
+    },
   },
 };