feat(nuxt): enable config schema by default (#19172)

packages/nuxt/src/core/schema.ts

@@ -1,5 +1,5 @@
 import { existsSync } from 'node:fs'
-import { writeFile, mkdir, rm } from 'node:fs/promises'
+import { writeFile, mkdir } from 'node:fs/promises'
 import { dirname, resolve } from 'pathe'
 import chokidar from 'chokidar'
 import { defu } from 'defu'
@@ -7,7 +7,6 @@ import { debounce } from 'perfect-debounce'
 import { defineNuxtModule, createResolver } from '@nuxt/kit'
 import {
   resolveSchema as resolveUntypedSchema,
-  generateMarkdown,
   generateTypes
 } from 'untyped'
 import type { Schema, SchemaDefinition } from 'untyped'
@@ -39,9 +38,14 @@ export default defineNuxtModule({
     })
 
     // Register module types
-    nuxt.hook('prepare:types', (ctx) => {
+    nuxt.hook('prepare:types', async (ctx) => {
       ctx.references.push({ path: 'nuxt-config-schema' })
       ctx.references.push({ path: 'schema/nuxt.schema.d.ts' })
+      if (nuxt.options._prepare) {
+        await nuxt.hooks.callHook('schema:beforeWrite', schema)
+        await writeSchema(schema)
+        await nuxt.hooks.callHook('schema:written')
+      }
     })
 
     // Resolve schema after all modules initialized
@@ -122,13 +126,6 @@ export default defineNuxtModule({
     }
 
     async function writeSchema (schema: Schema) {
-      // Avoid writing empty schema
-      const isEmptySchema = !schema.properties || Object.keys(schema.properties).length === 0
-      if (isEmptySchema) {
-        await rm(resolve(nuxt.options.buildDir, 'schema'), { recursive: true }).catch(() => { })
-        return
-      }
-
       // Write it to build dir
       await mkdir(resolve(nuxt.options.buildDir, 'schema'), { recursive: true })
       await writeFile(
@@ -136,12 +133,6 @@ export default defineNuxtModule({
         JSON.stringify(schema, null, 2),
         'utf8'
       )
-      const markdown = '# Nuxt Custom Config Schema' + generateMarkdown(schema)
-      await writeFile(
-        resolve(nuxt.options.buildDir, 'schema/nuxt.schema.md'),
-        markdown,
-        'utf8'
-      )
       const _types = generateTypes(schema, {
         addExport: true,
         interfaceName: 'NuxtCustomSchema',
@@ -152,12 +143,18 @@ export default defineNuxtModule({
         `
 export type CustomAppConfig = Exclude<NuxtCustomSchema['appConfig'], undefined>
 
+declare module '@nuxt/schema' {
+  interface NuxtConfig extends NuxtCustomSchema {}
+  interface NuxtOptions extends NuxtCustomSchema {}
+  interface CustomAppConfig extends CustomAppConfig {}
+}
+
 declare module 'nuxt/schema' {
   interface NuxtConfig extends NuxtCustomSchema {}
   interface NuxtOptions extends NuxtCustomSchema {}
-  interface AppConfigInput extends CustomAppConfig {}
+  interface CustomAppConfig extends CustomAppConfig {}
-  interface AppConfig extends CustomAppConfig {}
+}
-}`
+`
       const typesPath = resolve(
         nuxt.options.buildDir,
         'schema/nuxt.schema.d.ts'

packages/schema/src/config/experimental.ts

@@ -115,10 +115,10 @@ export default defineUntypedSchema({
     componentIslands: false,
 
     /**
-     * Enable experimental config schema support
+     * Config schema support
      *
      * @see https://github.com/nuxt/nuxt/issues/15592
      */
-    configSchema: false
+    configSchema: true
   }
 })

packages/schema/src/types/config.ts

@@ -135,7 +135,10 @@ export interface RuntimeConfig extends RuntimeConfigNamespace {
 }
 
 // -- App Config --
-export interface AppConfigInput extends Record<string, any> {
+
+export interface CustomAppConfig extends Record<string, any> { }
+
+export interface AppConfigInput extends CustomAppConfig {
   /** @deprecated reserved */
   private?: never
   /** @deprecated reserved */
@@ -153,4 +156,4 @@ export interface NuxtAppConfig {
   keepalive: boolean | KeepAliveProps
 }
 
-export interface AppConfig { }
+export interface AppConfig extends CustomAppConfig { }

test/fixtures/basic/nuxt.config.ts

@@ -11,6 +11,7 @@ declare module 'nitropack' {
 }
 
 export default defineNuxtConfig({
+  typescript: { strict: true },
   app: {
     pageTransition: true,
     layoutTransition: true,
@@ -161,8 +162,7 @@ export default defineNuxtConfig({
     componentIslands: true,
     reactivityTransform: true,
     treeshakeClientOnly: true,
-    payloadExtraction: true,
+    payloadExtraction: true
-    configSchema: true
   },
   appConfig: {
     fromNuxtConfig: true,

test/fixtures/basic/types.ts

@@ -247,8 +247,9 @@ describe('app config', () => {
         val: number
       },
       userConfig: number
+      [key: string]: any
     }
-    expectTypeOf<AppConfig>().toMatchTypeOf<ExpectedMergedAppConfig>()
+    expectTypeOf<AppConfig>().toEqualTypeOf<ExpectedMergedAppConfig>()
   })
 })