fix: warn duplicate entries in bundleless mode

packages/core/src/config.ts

@@ -1019,11 +1019,18 @@ const composeEntryConfig = async (
 
       for (const file of resolvedEntryFiles) {
         const entryName = getEntryName(file);
+
         if (resolvedEntries[entryName]) {
-          logger.warn(
-            `duplicate entry: ${entryName}, this may lead to the incorrect output, please rename the file`,
-          );
+          calcLcp &&
+            logger.warn(
+              `Duplicate entry ${color.cyan(entryName)} from ${color.cyan(
+                path.relative(root, file),
+              )} and ${color.cyan(
+                path.relative(root, resolvedEntries[entryName]),
+              )}, which may lead to the incorrect output, please rename the file.`,
+            );
         }
+
         resolvedEntries[entryName] = file;
       }
     }

tests/integration/entry/duplicate/package.json

@@ -0,0 +1,6 @@
+{
+  "name": "entry-duplicate-test",
+  "version": "1.0.0",
+  "private": true,
+  "type": "module"
+}

tests/integration/entry/duplicate/rslib.config.ts

@@ -0,0 +1,10 @@
+import { defineConfig } from '@rslib/core';
+import { generateBundleEsmConfig } from 'test-helper';
+
+export default defineConfig({
+  lib: [
+    generateBundleEsmConfig({
+      bundle: false,
+    }),
+  ],
+});

tests/integration/entry/duplicate/src/index.css

@@ -0,0 +1,3 @@
+.red {
+  color: red;
+}

tests/integration/entry/duplicate/src/index.module.css

@@ -0,0 +1,3 @@
+.counter-text {
+  font-size: 50px;
+}

tests/integration/entry/duplicate/src/index.ts

@@ -0,0 +1 @@
+export const foo = 'foo';

tests/integration/entry/index.test.ts

@@ -1,6 +1,6 @@
 import { join } from 'node:path';
 import stripAnsi from 'strip-ansi';
-import { buildAndGetResults, queryContent } from 'test-helper';
+import { buildAndGetResults, proxyConsole, queryContent } from 'test-helper';
 import { expect, test } from 'vitest';
 
 test('default entry', async () => {
@@ -168,3 +168,21 @@
     `"The source.entry configuration should be an object, but received string: ./src/**. Checkout https://lib.rsbuild.dev/config/rsbuild/source#sourceentry for more details."`,
   );
 });
+
+test('duplicate entry in bundleless mode', async () => {
+  const { logs, restore } = proxyConsole();
+  const fixturePath = join(__dirname, 'duplicate');
+  await buildAndGetResults({ fixturePath });
+
+  const logStrings = logs.map((log) => stripAnsi(log));
+
+  expect(
+    logStrings.some((log) =>
+      log.includes(
+        'Duplicate entry index from src/index.ts and src/index.svg, which may lead to the incorrect output, please rename the file.',
+      ),
+    ),
+  ).toBe(true);
+
+  restore();
+});