From 4d2ca789d2e7e3d3bd66449421be0003967e00e0 Mon Sep 17 00:00:00 2001
From: Tim Neutkens <tim@timneutkens.nl>
Date: Sat, 16 Jun 2018 13:03:42 +0200
Subject: [PATCH] Only log out using external babelrc once (#4600)

---
 build/loaders/next-babel-loader.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/build/loaders/next-babel-loader.js b/build/loaders/next-babel-loader.js
index cf2bdda9..ecf6cf78 100644
--- a/build/loaders/next-babel-loader.js
+++ b/build/loaders/next-babel-loader.js
@@ -24,7 +24,8 @@ module.exports = babelLoader.custom(babel => {
       const options = Object.assign({}, cfg.options)
       if (cfg.hasFilesystemConfig()) {
         for (const file of [cfg.babelrc, cfg.config]) {
-          if (file && !configs.has(file)) {
+          // We only log for client compilation otherwise there will be double output
+          if (file && !isServer && !configs.has(file)) {
             configs.add(file)
             console.log(`> Using external babel configuration`)
             console.log(`> Location: "${file}"`)