feat: support overriding nested runtime config

package.json

@@ -72,6 +72,7 @@
     "rollup": "^2.66.1",
     "rollup-plugin-terser": "^7.0.2",
     "rollup-plugin-visualizer": "^5.5.4",
+    "scule": "^0.2.1",
     "serve-placeholder": "^1.2.4",
     "serve-static": "^1.14.2",
     "std-env": "^3.0.1",

src/runtime/app/config.ts

@@ -1,22 +1,26 @@
 import destr from 'destr'
 import defu from 'defu'
+import { snakeCase } from 'scule'
 
 // Bundled runtime config (injected by nitro)
 const _runtimeConfig = process.env.RUNTIME_CONFIG as any
 
 // Allow override from process.env and deserialize
 for (const type of ['private', 'public']) {
   for (const key in _runtimeConfig[type]) {
-    _runtimeConfig[type][key] = destr(process.env[key] || _runtimeConfig[type][key])
+    // baseURL can be overridden by BASE_URL
+    const envKey = snakeCase(key).toUpperCase()
+    _runtimeConfig[type][key] = destr(process.env[envKey] || _runtimeConfig[type][key])
+    if (_runtimeConfig[type][key] && typeof _runtimeConfig[type][key] === 'object') {
+      for (const subkey in _runtimeConfig[type][key]) {
+        // key: { subKey } can be overridden by KEY_SUB_KEY`
+        const envKeyName = `${envKey}_${snakeCase(subkey).toUpperCase()}`
+        _runtimeConfig[type][key][subkey] = destr(process.env[envKeyName]) || _runtimeConfig[type][key][subkey]
+      }
+    }
   }
 }
 
-// Load dynamic app configuration
-const appConfig = _runtimeConfig.public.app
-appConfig.baseURL = process.env.NUXT_APP_BASE_URL || appConfig.baseURL
-appConfig.cdnURL = process.env.NUXT_APP_CDN_URL || appConfig.cdnURL
-appConfig.buildAssetsDir = process.env.NUXT_APP_BUILD_ASSETS_DIR || appConfig.buildAssetsDir
-
 // Named exports
 export const privateConfig = deepFreeze(defu(_runtimeConfig.private, _runtimeConfig.public))
 export const publicConfig = deepFreeze(_runtimeConfig.public)

yarn.lock

@@ -4533,6 +4533,7 @@ __metadata:
     rollup: ^2.66.1
     rollup-plugin-terser: ^7.0.2
     rollup-plugin-visualizer: ^5.5.4
+    scule: ^0.2.1
     serve-placeholder: ^1.2.4
     serve-static: ^1.14.2
     std-env: ^3.0.1