From de2c342bf9f8304ff1da88b4f93817257ae98db6 Mon Sep 17 00:00:00 2001
From: Tim Neutkens <timneutkens@me.com>
Date: Thu, 12 Aug 2021 13:40:11 +0200
Subject: [PATCH] Ensure config file message is only shown once

Fixes #27982
---
 packages/next/build/babel/loader/get-config.ts | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/packages/next/build/babel/loader/get-config.ts b/packages/next/build/babel/loader/get-config.ts
index 5c4855d055e789c..c0d80a805b468f2 100644
--- a/packages/next/build/babel/loader/get-config.ts
+++ b/packages/next/build/babel/loader/get-config.ts
@@ -302,6 +302,7 @@ function getCacheKey(cacheCharacteristics: CharacteristicsGermaneToCaching) {
 
 type BabelConfig = any
 const configCache: Map<any, BabelConfig> = new Map()
+const configFiles: Set<string> = new Set()
 
 export default function getConfig(
   this: NextJsLoaderContext,
@@ -346,7 +347,8 @@ export default function getConfig(
     }
   }
 
-  if (loaderOptions.configFile) {
+  if (loaderOptions.configFile && !configFiles.has(loaderOptions.configFile)) {
+    configFiles.add(loaderOptions.configFile)
     Log.info(
       `Using external babel configuration from ${loaderOptions.configFile}`
     )