feat(config): support `.nuxtrc` (#7430)

[release]

.gitignore

@@ -18,6 +18,7 @@ distributions/*/LICENSE
 # Other
 .nuxt*
 !.nuxtignore
+!.nuxtrc
 .cache
 
 # Dist folders

packages/config/package.json

@@ -16,6 +16,7 @@
     "destr": "^0.1.9",
     "dotenv": "^8.2.0",
     "esm": "^3.2.25",
+    "rc9": "^0.0.6",
     "std-env": "^2.2.1"
   },
   "publishConfig": {

packages/config/src/load.js

@@ -6,6 +6,7 @@ import dotenv from 'dotenv'
 import { clearRequireCache, scanRequireTree } from '@nuxt/utils'
 import esm from 'esm'
 import destr from 'destr'
+import * as rc from 'rc9'
 import { defaultNuxtConfigFile } from './config'
 
 export async function loadNuxtConfig ({
@@ -71,7 +72,7 @@ export async function loadNuxtConfig ({
     }
 
     // Don't mutate options export
-    options = defu(configOverrides, options)
+    options = { ...options }
 
     // Keep _nuxtConfigFile for watching
     options._nuxtConfigFile = configFile
@@ -87,6 +88,15 @@ export async function loadNuxtConfig ({
     options.rootDir = rootDir
   }
 
+  // Load Combine configs
+  // Priority: configOverrides > nuxtConfig > .nuxtrc > .nuxtrc (global)
+  options = defu(
+    configOverrides,
+    options,
+    rc.read({ name: '.nuxtrc', dir: options.rootDir }),
+    rc.readUser('.nuxtrc')
+  )
+
   // Load env to options._env
   options._env = env
   options._envConfig = envConfig

packages/config/test/fixtures/nuxtrc/.nuxtrc

@@ -0,0 +1 @@
+rc.works=true

packages/config/test/load.test.js

@@ -0,0 +1,10 @@
+
+import { resolve } from 'path'
+import { loadNuxtConfig } from '../src/load'
+
+describe('config: load', () => {
+  test('load local nuxtrc', async () => {
+    const config = await loadNuxtConfig({ rootDir: resolve(__dirname, 'fixtures/nuxtrc') })
+    expect(config.rc.works).toBe(true)
+  })
+})

yarn.lock

@@ -6184,6 +6184,13 @@ flat-cache@^2.0.1:
     rimraf "2.6.3"
     write "1.0.3"
 
+flat@^5.0.0:
+  version "5.0.0"
+  resolved "https://registry.npmjs.org/flat/-/flat-5.0.0.tgz#dab7d71d60413becb0ac2de9bf4304495e3af6af"
+  integrity sha512-6KSMM+cHHzXC/hpldXApL2S8Uz+QZv+tq5o/L0KQYleoG+GcwrnIJhTWC7tCOiKQp8D/fIvryINU1OZCCwevjA==
+  dependencies:
+    is-buffer "~2.0.4"
+
 flatted@^2.0.0:
   version "2.0.2"
   resolved "https://registry.npmjs.org/flatted/-/flatted-2.0.2.tgz#4575b21e2bcee7434aa9be662f4b7b5f9c2b5138"
@@ -7255,6 +7262,11 @@ is-buffer@^1.1.5:
   resolved "https://registry.npmjs.org/is-buffer/-/is-buffer-1.1.6.tgz#efaa2ea9daa0d7ab2ea13a97b2b8ad51fefbe8be"
   integrity sha512-NcdALwpXkTm5Zvvbk7owOUSvVvBKDgKP5/ewfXEznmQFfs4ZRmanOeKBTjRVjka3QFoN6XJ+9F3USqfHqTaU5w==
 
+is-buffer@~2.0.4:
+  version "2.0.4"
+  resolved "https://registry.npmjs.org/is-buffer/-/is-buffer-2.0.4.tgz#3e572f23c8411a5cfd9557c849e3665e0b290623"
+  integrity sha512-Kq1rokWXOPXWuaMAqZiJW4XxsmD9zGx9q4aePabbn3qCRGedtH7Cm+zV8WETitMfu1wdh+Rvd6w5egwSngUX2A==
+
 is-callable@^1.1.4, is-callable@^1.1.5:
   version "1.1.5"
   resolved "https://registry.npmjs.org/is-callable/-/is-callable-1.1.5.tgz#f7e46b596890456db74e7f6e976cb3273d06faab"
@@ -10960,6 +10972,15 @@ raw-body@2.4.0:
     iconv-lite "0.4.24"
     unpipe "1.0.0"
 
+rc9@^0.0.6:
+  version "0.0.6"
+  resolved "https://registry.npmjs.org/rc9/-/rc9-0.0.6.tgz#5943a94dcec5070093134203c8e4909157a4c235"
+  integrity sha512-zJ6/hL0BG2Hs9g/1EHVncgAhDDCO86zntU16fRbUPyAIIEnWPb4ojmoQE8KL4VuO4jMRyLa/DyxOicwr8sdWyw==
+  dependencies:
+    defu "^2.0.4"
+    destr "^0.1.9"
+    flat "^5.0.0"
+
 react-is@^16.12.0:
   version "16.13.1"
   resolved "https://registry.npmjs.org/react-is/-/react-is-16.13.1.tgz#789729a4dc36de2999dc156dd6c1d9c18cea56a4"