fix: emit correct warning message when no entry found in bundleless mode

packages/core/src/config.ts

@@ -1344,7 +1344,11 @@ const composeEntryConfig = async (
       });
 
       if (resolvedEntryFiles.length === 0) {
-        throw new Error(`Cannot find ${resolvedEntryFiles}`);
+        const error = new Error(
+          `No entry files matching ${entryFiles.map((file) => color.cyan(file)).join(', ')}. Please ensure the entry pattern in ${color.cyan('source.entry')} is correct and points to valid source files.`,
+        );
+        error.stack = '';
+        throw error;
       }
 
       const outBase = await resolveOutBase(resolvedEntryFiles);

tests/integration/entry/index.test.ts

@@ -182,7 +182,7 @@ test('validate entry and throw errors', async () => {
   try {
     await buildAndGetResults({
       fixturePath,
-      configPath: 'nonExistingFile.config.ts',
+      configPath: 'bundleNonExistingFile.config.ts',
     });
   } catch (e) {
     errMsg = (e as AggregateError).errors.join('\n\n');
@@ -192,6 +192,19 @@ test('validate entry and throw errors', async () => {
     `"Error: Can't resolve the entry "./src/main.ts" at the location <ROOT>/tests/integration/entry/validate/src/main.ts. Please ensure that the file exists."`,
   );
 
+  try {
+    await buildAndGetResults({
+      fixturePath,
+      configPath: 'bundlelessNonExistingFile.config.ts',
+    });
+  } catch (e) {
+    errMsg = (e as Error).message;
+  }
+
+  expect(stripAnsi(errMsg)).toMatchInlineSnapshot(
+    `"No entry files matching ./src/non-existing-file.ts, ./non-existing-folder/**/*. Please ensure the entry pattern in source.entry is correct and points to valid source files."`,
+  );
+
   try {
     await buildAndGetResults({
       fixturePath,

tests/integration/entry/validate/bundlelessNonExistingFile.config.ts

@@ -0,0 +1,15 @@
+import { defineConfig } from '@rslib/core';
+import { generateBundleEsmConfig } from 'test-helper';
+
+export default defineConfig({
+  lib: [
+    generateBundleEsmConfig({
+      bundle: false,
+      source: {
+        entry: {
+          index: ['./src/non-existing-file.ts', './non-existing-folder/**/*'],
+        },
+      },
+    }),
+  ],
+});