fix(config): enhance loadConfig to track user custom config presence (#5132)

zyyv · web-flow · commit 76f650e4ff04 · 2026-03-04T16:14:03.000+08:00
diff --git a/packages-engine/config/src/index.ts b/packages-engine/config/src/index.ts
@@ -16,7 +16,10 @@ export async function loadConfig<U extends UserConfig>(
   defaults: UserConfigDefaults = {},
 ): Promise<LoadConfigResult<U>> {
   let inlineConfig = {} as U
+  let hasUserCustomConfig = false
+
   if (typeof configOrPath !== 'string') {
+    hasUserCustomConfig = true
     inlineConfig = configOrPath
     if (inlineConfig.configFile === false) {
       return {
@@ -60,16 +63,16 @@ export async function loadConfig<U extends UserConfig>(
           ...extraConfigSources,
         ],
     cwd,
-    defaults: inlineConfig,
   })
 
   const result = await loader.load()
 
-  if (!isFile && !result.sources?.length) {
+  if (!hasUserCustomConfig && !isFile && !result.config) {
     consola.error(`[@unocss/config] Config file not found in ${cyan(configOrPath)} - loading default config.`)
   }
 
   result.config = Object.assign(defaults, inlineConfig, result.config ?? {})
+
   if (result.config.configDeps) {
     result.sources = [
       ...result.sources,
diff --git a/packages-integrations/vite/src/index.ts b/packages-integrations/vite/src/index.ts
@@ -32,15 +32,16 @@ export default function UnocssPlugin<Theme extends object>(
   configOrPath?: VitePluginConfig<Theme> | string,
   defaults: UserConfigDefaults = {},
 ): Plugin[] {
-  const ctx = createContext<VitePluginConfig>(configOrPath as any, {
-    envMode: process.env.NODE_ENV === 'development'
-      ? 'dev'
-      : 'build',
-    ...defaults,
-    legacy: typeof configOrPath !== 'string'
-      ? (configOrPath?.legacy || { renderModernChunks: true })
-      : { renderModernChunks: true },
-  })
+  const ctx = createContext<VitePluginConfig>(
+    configOrPath as any,
+    {
+      envMode: process.env.NODE_ENV === 'development' ? 'dev' : 'build',
+      ...defaults,
+      legacy: typeof configOrPath !== 'string'
+        ? (configOrPath?.legacy || { renderModernChunks: true })
+        : { renderModernChunks: true },
+    },
+  )
   const inlineConfig = (configOrPath && typeof configOrPath !== 'string') ? configOrPath : {}
   const mode = inlineConfig.mode ?? 'global'
 
