feat: re-export flat configs "flat/*"

long-time plan:

v6: no action
v7: rename 'flat/*' => '*'; eslintrc config '*' => 'legacy/*'?
v8~: remove eslintrc supports

Author: aladdin-add

configs/all-type-checked.js

@@ -1,8 +1,9 @@
+/**
+ * @deprecated use 'flat/all-type-checked' instead
+ * @author 唯然<[email protected]>
+ */
 'use strict';
 
-const mod = require('../lib/index.js');
+const plugin = require('../lib/index.js');
 
-module.exports = {
-  plugins: { 'eslint-plugin': mod },
-  rules: mod.configs['all-type-checked'].rules,
-};
+module.exports = plugin.configs['flat/all-type-checked']

configs/all.js

@@ -1,13 +1,11 @@
 /**
  * @fileoverview the `all` config for `eslint.config.js`
+ * @deprecated use 'flat/all' instead
  * @author 唯然<[email protected]>
  */
 
 'use strict';
 
-const mod = require('../lib/index.js');
+const plugin = require('../lib/index.js');
 
-module.exports = {
-  plugins: { 'eslint-plugin': mod },
-  rules: mod.configs.all.rules,
-};
+module.exports = plugin.configs['flat/all']

configs/recommended.js

@@ -1,13 +1,11 @@
 /**
  * @fileoverview the `recommended` config for `eslint.config.js`
+ * @deprecated use 'flat/recommended' instead
  * @author 唯然<[email protected]>
  */
 
 'use strict';
 
-const mod = require('../lib/index.js');
+const plugin = require('../lib/index.js');
 
-module.exports = {
-  plugins: { 'eslint-plugin': mod },
-  rules: mod.configs.recommended.rules,
-};
+module.exports = plugin.configs['flat/recommended']

configs/rules-recommended.js

@@ -1,13 +1,11 @@
 /**
  * @fileoverview the `rules-recommended` config for `eslint.config.js`
+ * @deprecated use 'flat/rules-recommended' instead
  * @author 唯然<[email protected]>
  */
 
 'use strict';
 
-const mod = require('../lib/index.js');
+const plugin = require('../lib/index.js');
 
-module.exports = {
-  plugins: { 'eslint-plugin': mod },
-  rules: mod.configs['rules-recommended'].rules,
-};
+module.exports = plugin.configs['flat/rules-recommended']

configs/rules.js

@@ -1,13 +1,11 @@
 /**
  * @fileoverview the `rules` config for `eslint.config.js`
+ * @deprecated use 'flat/rules' instead
  * @author 唯然<[email protected]>
  */
 
 'use strict';
 
-const mod = require('../lib/index.js');
+const plugin = require('../lib/index.js');
 
-module.exports = {
-  plugins: { 'eslint-plugin': mod },
-  rules: mod.configs.rules.rules,
-};
+module.exports = plugin.configs['flat/rules']

configs/tests-recommended.js

@@ -1,13 +1,11 @@
 /**
  * @fileoverview the `tests-recommended` config for `eslint.config.js`
+ * @deprecated use 'flat/tests-recommended' instead
  * @author 唯然<[email protected]>
  */
 
 'use strict';
 
-const mod = require('../lib/index.js');
+const plugin = require('../lib/index.js');
 
-module.exports = {
-  plugins: { 'eslint-plugin': mod },
-  rules: mod.configs['tests-recommended'].rules,
-};
+module.exports = plugin.configs['flat/tests-recommended']

configs/tests.js

@@ -1,13 +1,11 @@
 /**
  * @fileoverview the `tests` config for `eslint.config.js`
+ * @deprecated use 'flat/tests' instead
  * @author 唯然<[email protected]>
  */
 
 'use strict';
 
-const mod = require('../lib/index.js');
+const plugin = require('../lib/index.js');
 
-module.exports = {
-  plugins: { 'eslint-plugin': mod },
-  rules: mod.configs.tests.rules,
-};
+module.exports = plugin.configs['flat/tests']

lib/index.js

@@ -42,18 +42,38 @@ const allRules = Object.fromEntries(
     ])
 );
 
-module.exports.meta = {
-  name: packageMetadata.name,
-  version: packageMetadata.version,
-};
+const plugin = {
+  meta: {
+    name: packageMetadata.name,
+    version: packageMetadata.version,
+  },
+  rules: allRules,
+  configs: {}, // assigned later
+}
 
-module.exports.rules = allRules;
+// eslintrc configs
+Object.assign(plugin.configs, Object.keys(configFilters).reduce(
+  (configs, configName) => {
+    return Object.assign(configs, {
+      [`flat/${configName}`]: {
+        plugins: ['eslint-plugin'],
+        rules: Object.fromEntries(
+          Object.keys(allRules)
+            .filter((ruleName) => configFilters[configName](allRules[ruleName]))
+            .map((ruleName) => [`${PLUGIN_NAME}/${ruleName}`, 'error'])
+        ),
+      },
+    });
+  },
+  {}
+));
 
-module.exports.configs = Object.keys(configFilters).reduce(
+// flat configs
+Object.assign(plugin.configs, Object.keys(configFilters).reduce(
   (configs, configName) => {
     return Object.assign(configs, {
       [configName]: {
-        plugins: ['eslint-plugin'],
+        plugins: { 'eslint-plugin': plugin},
         rules: Object.fromEntries(
           Object.keys(allRules)
             .filter((ruleName) => configFilters[configName](allRules[ruleName]))
@@ -63,4 +83,6 @@ module.exports.configs = Object.keys(configFilters).reduce(
     });
   },
   {}
-);
+));
+
+module.exports = plugin;