fix!: mixed-esm-and-cjs should only add the deviating type aside from base

lib/configs/recommended-env.js

@@ -0,0 +1,46 @@
+"use strict"
+
+const globals = require("globals")
+const { getPackageJson } = require("../util/get-package-json")
+
+const packageJson = getPackageJson()
+
+const isModule =
+    packageJson != null &&
+    typeof packageJson === "object" &&
+    "type" in packageJson &&
+    packageJson.type === "module"
+
+const moduleEnv = {
+    name: "node/env/module",
+    languageOptions: {
+        globals: {
+            ...globals.nodeBuiltin,
+        },
+    },
+}
+
+const scriptEnv = {
+    name: "node/env/script",
+    languageOptions: {
+        globals: {
+            ...globals.node,
+        },
+    },
+}
+
+const recommendedEnv = [
+    {
+        ...(isModule ? { ignores: ["**/*.cjs"] } : { files: ["**/*.mjs"] }),
+        ...moduleEnv,
+    },
+    {
+        ...(isModule ? { files: ["**/*.cjs"] } : { ignores: ["**/*.mjs"] }),
+        ...scriptEnv,
+    },
+]
+
+module.exports = {
+    isModule,
+    recommendedEnv,
+}

lib/configs/recommended-mixed.js

@@ -0,0 +1,16 @@
+"use strict"
+
+const { commonRules } = require("./_commons")
+const { recommendedEnv } = require("./recommended-env")
+
+/**
+ * https://eslint.org/docs/latest/use/configure/configuration-files-new
+ * @type {import('eslint').Linter.FlatConfig[]}
+ */
+module.exports = [
+    ...recommendedEnv,
+    {
+        name: "node/recommended",
+        rules: commonRules,
+    },
+]

lib/configs/recommended.js

@@ -1,16 +1,9 @@
 "use strict"
 
-const { getPackageJson } = require("../util/get-package-json")
+const { isModule } = require("./recommended-env")
 const moduleConfig = require("./recommended-module")
 const scriptConfig = require("./recommended-script")
 
-const packageJson = getPackageJson()
-
-const isModule =
-    packageJson != null &&
-    typeof packageJson === "object" &&
-    "type" in packageJson &&
-    packageJson.type === "module"
 const recommendedConfig = isModule ? moduleConfig : scriptConfig
 
 /**

lib/index.js

@@ -1,15 +1,21 @@
 "use strict"
 
 const pkg = require("../package.json")
+const { recommendedEnv } = require("./configs/recommended-env")
+const mixedConfig = require("./configs/recommended-mixed")
 const esmConfig = require("./configs/recommended-module")
 const cjsConfig = require("./configs/recommended-script")
 const recommendedConfig = require("./configs/recommended")
 
+const recommendedMixed = structuredClone(mixedConfig)
+
 /**
  * @typedef {{
      'recommended-module': import('eslint').ESLint.ConfigData;
      'recommended-script': import('eslint').ESLint.ConfigData;
      'recommended': import('eslint').ESLint.ConfigData;
+     'flat/recommended-env': import('eslint').Linter.FlatConfig[];
+     'flat/recommended-mixed': import('eslint').Linter.FlatConfig[];
      'flat/recommended-module': import('eslint').Linter.FlatConfig;
      'flat/recommended-script': import('eslint').Linter.FlatConfig;
      'flat/recommended': import('eslint').Linter.FlatConfig;
@@ -71,23 +77,18 @@ const plugin = {
         "recommended-module": { plugins: ["n"], ...esmConfig.eslintrc },
         "recommended-script": { plugins: ["n"], ...cjsConfig.eslintrc },
         recommended: { plugins: ["n"], ...recommendedConfig.eslintrc },
+        "flat/recommended-env": structuredClone(recommendedEnv),
+        "flat/recommended-mixed": recommendedMixed,
         "flat/recommended-module": { ...esmConfig.flat },
         "flat/recommended-script": { ...cjsConfig.flat },
         "flat/recommended": { ...recommendedConfig.flat },
-        "flat/mixed-esm-and-cjs": [
-            { files: ["**/*.js"], ...recommendedConfig.flat },
-            { files: ["**/*.mjs"], ...esmConfig.flat },
-            { files: ["**/*.cjs"], ...cjsConfig.flat },
-        ],
+        "flat/mixed-esm-and-cjs": recommendedMixed,
     },
 }
 
 plugin.configs["flat/recommended-module"].plugins = { n: plugin }
 plugin.configs["flat/recommended-script"].plugins = { n: plugin }
 plugin.configs["flat/recommended"].plugins = { n: plugin }
-
-for (const config of plugin.configs["flat/mixed-esm-and-cjs"]) {
-    config.plugins = { n: plugin }
-}
+recommendedMixed[recommendedMixed.length - 1].plugins = { n: plugin }
 
 module.exports = plugin