From 120f3b97456597998b29413e8eec5e7ad41f2e7a Mon Sep 17 00:00:00 2001
From: Ben McCann <322311+benmccann@users.noreply.github.com>
Date: Sun, 8 Aug 2021 22:17:24 -0700
Subject: [PATCH] feat: log a warning if dependency pre-bundling cannot be run
 (#4546)

---
 packages/vite/src/node/optimizer/scan.ts | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/packages/vite/src/node/optimizer/scan.ts b/packages/vite/src/node/optimizer/scan.ts
index 0cd95ffe6df96c..e8f58e1da10385 100644
--- a/packages/vite/src/node/optimizer/scan.ts
+++ b/packages/vite/src/node/optimizer/scan.ts
@@ -79,7 +79,9 @@ export async function scanImports(config: ResolvedConfig): Promise<{
   )
 
   if (!entries.length) {
-    debug(`No entry HTML files detected`)
+    config.logger.warn(
+      'Could not determine entry point from rollupOptions or html files. Skipping dependency pre-bundling.'
+    )
     return { deps: {}, missing: {} }
   } else {
     debug(`Crawling dependencies using entries:\n  ${entries.join('\n  ')}`)