From f8dabf5a3cf06eeb0bc438335a8e123b9757467a Mon Sep 17 00:00:00 2001
From: Norbert de Langen <ndelangen@me.com>
Date: Thu, 27 Oct 2022 13:03:27 +0200
Subject: [PATCH] only copy .mjs files from from storybook/manager/dist in
 manager-builder

---
 code/lib/builder-manager/src/index.ts | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/code/lib/builder-manager/src/index.ts b/code/lib/builder-manager/src/index.ts
index af89cf0cdbed..8ce561bb0533 100644
--- a/code/lib/builder-manager/src/index.ts
+++ b/code/lib/builder-manager/src/index.ts
@@ -1,4 +1,4 @@
-import { dirname, join } from 'path';
+import { dirname, join, parse } from 'path';
 import fs from 'fs-extra';
 import express from 'express';
 
@@ -192,7 +192,15 @@ const builder: BuilderFunction = async function* builderGeneratorFn({ startTime,
 
   yield;
 
-  const managerFiles = fs.copy(coreDirOrigin, coreDirTarget);
+  const managerFiles = fs.copy(coreDirOrigin, coreDirTarget, {
+    filter: (src) => {
+      const { ext } = parse(src);
+      if (ext) {
+        return ext === '.mjs';
+      }
+      return true;
+    },
+  });
   const { cssFiles, jsFiles } = await readOrderedFiles(addonsDir, compilation?.outputFiles);
 
   yield;