feat: support DTS bundle file name (#75)

e2e/cases/dts/bundle/bundleName.config.ts

@@ -0,0 +1,18 @@
+import { generateBundleCjsConfig, generateBundleEsmConfig } from '@e2e/helper';
+import { defineConfig } from '@rslib/core';
+
+export default defineConfig({
+  lib: [
+    generateBundleEsmConfig(__dirname, {
+      dts: {
+        bundle: true,
+      },
+    }),
+    generateBundleCjsConfig(__dirname),
+  ],
+  source: {
+    entry: {
+      bundleName: './src/index.ts',
+    },
+  },
+});

e2e/cases/dts/index.test.ts

@@ -90,7 +90,7 @@ describe('dts when bundle: true', () => {
       'dts',
     );
 
-    expect(entryFiles.esm).toEqual('./dist/esm/index.d.ts');
+    expect(entryFiles.esm).toEqual('./dist/esm/main.d.ts');
     expect(entries).toMatchSnapshot();
   });
 
@@ -113,7 +113,7 @@ describe('dts when bundle: true', () => {
       'dts',
     );
 
-    expect(entryFiles.esm).toEqual('./dist/custom/index.d.ts');
+    expect(entryFiles.esm).toEqual('./dist/custom/main.d.ts');
   });
 
   test('abortOnError: false', async () => {
@@ -135,6 +135,17 @@ describe('dts when bundle: true', () => {
       'dts',
     );
 
-    expect(entryFiles.cjs).toEqual('./dist/cjs/index.d.cts');
+    expect(entryFiles.cjs).toEqual('./dist/cjs/main.d.cts');
+  });
+
+  test('bundleName -- set source.entry', async () => {
+    const fixturePath = join(__dirname, 'bundle');
+    const { entryFiles } = await buildAndGetResults(
+      fixturePath,
+      'bundleName.config.ts',
+      'dts',
+    );
+
+    expect(entryFiles.esm).toEqual('./dist/esm/bundleName.d.ts');
   });
 });

packages/plugin-dts/src/apiExtractor.ts

@@ -6,14 +6,15 @@ import {
 } from '@microsoft/api-extractor';
 import { logger } from '@rsbuild/core';
 import color from 'picocolors';
+import type { DtsEntry } from 'src';
 import { getTimeCost } from './utils';
 
 export type BundleOptions = {
   name: string;
   cwd: string;
   outDir: string;
   dtsExtension: string;
-  entry?: string;
+  dtsEntry: DtsEntry;
   tsconfigPath?: string;
 };
 
@@ -23,18 +24,22 @@ export async function bundleDts(options: BundleOptions): Promise<void> {
     cwd,
     outDir,
     dtsExtension,
-    entry = 'index.d.ts',
+    dtsEntry = {
+      name: 'index',
+      path: 'index.d.ts',
+    },
     tsconfigPath = 'tsconfig.json',
   } = options;
   try {
     const start = Date.now();
     const untrimmedFilePath = join(
       cwd,
       relative(cwd, outDir),
-      `index${dtsExtension}`,
+      `${dtsEntry.name}${dtsExtension}`,
     );
+    const mainEntryPointFilePath = dtsEntry.path!;
     const internalConfig = {
-      mainEntryPointFilePath: entry,
+      mainEntryPointFilePath,
       // TODO: use !externals
       // bundledPackages: [],
       dtsRollup: {

packages/plugin-dts/src/dts.ts

@@ -10,7 +10,7 @@ export async function generateDts(data: DtsGenOptions): Promise<void> {
   const {
     bundle,
     distPath,
-    entryPath,
+    dtsEntry,
     tsconfigPath,
     name,
     cwd,
@@ -37,6 +37,7 @@ export async function generateDts(data: DtsGenOptions): Promise<void> {
   };
 
   const declarationDir = getDeclarationDir(bundle!, distPath);
+  const { name: entryName, path: entryPath } = dtsEntry;
   let entry = '';
 
   if (bundle === true && entryPath) {
@@ -59,7 +60,10 @@ export async function generateDts(data: DtsGenOptions): Promise<void> {
         name,
         cwd,
         outDir,
-        entry,
+        dtsEntry: {
+          name: entryName,
+          path: entry,
+        },
         tsconfigPath,
         dtsExtension,
       });
@@ -99,6 +103,7 @@ process.on('message', async (data: DtsGenOptions) => {
   try {
     await generateDts(data);
   } catch (e) {
+    logger.error(e);
     process.send!('error');
     process.exit(1);
   }

packages/plugin-dts/src/index.ts

@@ -1,6 +1,7 @@
 import { fork } from 'node:child_process';
 import { extname, join } from 'node:path';
 import { type RsbuildPlugin, logger } from '@rsbuild/core';
+import { processSourceEntry } from './utils';
 
 export type PluginDtsOptions = {
   bundle?: boolean;
@@ -9,11 +10,16 @@ export type PluginDtsOptions = {
   dtsExtension?: string;
 };
 
+export type DtsEntry = {
+  name?: string;
+  path?: string;
+};
+
 export type DtsGenOptions = PluginDtsOptions & {
   name: string;
   cwd: string;
   isWatch: boolean;
-  entryPath?: string;
+  dtsEntry: DtsEntry;
   tsconfigPath?: string;
 };
 
@@ -54,10 +60,16 @@ export const pluginDts = (options: PluginDtsOptions): RsbuildPlugin => ({
           stdio: 'inherit',
         });
 
+        // TODO: @microsoft/api-extractor only support single entry to bundle DTS
+        // use first element of Record<string, string> type entry config
+        const dtsEntry = processSourceEntry(
+          options.bundle!,
+          config.source?.entry,
+        );
+
         const dtsGenOptions: DtsGenOptions = {
           ...options,
-          // TODO: temporarily use main as dts entry, only accept single entry
-          entryPath: config.source?.entry?.main as string,
+          dtsEntry,
           tsconfigPath: config.source.tsconfigPath,
           name: environment.name,
           cwd: api.context.rootPath,

packages/plugin-dts/src/utils.ts

@@ -1,8 +1,9 @@
 import fs from 'node:fs';
 import path from 'node:path';
-import { logger } from '@rsbuild/core';
+import { type RsbuildConfig, logger } from '@rsbuild/core';
 import fg from 'fast-glob';
 import color from 'picocolors';
+import type { DtsEntry } from 'src';
 import * as ts from 'typescript';
 
 export function loadTsconfig(tsconfigPath: string): ts.ParsedCommandLine {
@@ -70,3 +71,29 @@ export async function processDtsFiles(
     }
   }
 }
+
+export function processSourceEntry(
+  bundle: boolean,
+  entryConfig: NonNullable<RsbuildConfig['source']>['entry'],
+): DtsEntry {
+  if (!bundle) {
+    return {
+      name: undefined,
+      path: undefined,
+    };
+  }
+
+  if (
+    entryConfig &&
+    Object.values(entryConfig).every((val) => typeof val === 'string')
+  ) {
+    return {
+      name: Object.keys(entryConfig)[0] as string,
+      path: Object.values(entryConfig)[0] as string,
+    };
+  }
+
+  throw new Error(
+    '@microsoft/api-extractor only support single entry of Record<string, string> type to bundle DTS, please check your entry config.',
+  );
+}