From 0e2322cb8fb353775bd81d1421514af501d4cc8e Mon Sep 17 00:00:00 2001
From: Tim Neutkens <tim@timneutkens.nl>
Date: Tue, 29 Aug 2023 23:14:47 +0200
Subject: [PATCH] Reimplement getBabelConfigFile to be simpler

---
 .../next/src/build/get-babel-config-file.ts   | 19 ++++++++-----------
 1 file changed, 8 insertions(+), 11 deletions(-)

diff --git a/packages/next/src/build/get-babel-config-file.ts b/packages/next/src/build/get-babel-config-file.ts
index 29fa7584f4295..beb33a1ad3190 100644
--- a/packages/next/src/build/get-babel-config-file.ts
+++ b/packages/next/src/build/get-babel-config-file.ts
@@ -16,15 +16,12 @@ const BABEL_CONFIG_FILES = [
 export async function getBabelConfigFile(
   dir: string
 ): Promise<string | undefined> {
-  const babelConfigFile = await BABEL_CONFIG_FILES.reduce(
-    async (memo: Promise<string | undefined>, filename) => {
-      const configFilePath = join(dir, filename)
-      return (
-        (await memo) ||
-        ((await fileExists(configFilePath)) ? configFilePath : undefined)
-      )
-    },
-    Promise.resolve(undefined)
-  )
-  return babelConfigFile
+  for (const filename of BABEL_CONFIG_FILES) {
+    const configFilePath = join(dir, filename)
+    const exists = await fileExists(configFilePath)
+    if (!exists) {
+      continue
+    }
+    return configFilePath
+  }
 }