fix: recognize .d.mts files in build mode

sxzz · sxzz · commit 1ded2c1d5110 · 2026-01-04T17:21:21.000+08:00
Fixes #156 where the plugin failed to recognize .d.mts output files when using build mode with .mts source files. Changed file extension checks from hardcoded .endsWith() to regex patterns that handle both .d.ts and .d.mts extensions.
diff --git a/src/tsc/emit-build.ts b/src/tsc/emit-build.ts
@@ -1,5 +1,6 @@
 import { createDebug } from 'obug'
 import ts from 'typescript'
+import { RE_DTS, RE_DTS_MAP } from '../filename.ts'
 import {
   globalContext,
   type ParsedProject,
@@ -71,7 +72,7 @@ export function tscEmitBuild(tscOptions: TscOptions): TscResult {
   let map: ExistingRawSourceMap | undefined
 
   for (const outputFile of outputFiles) {
-    if (outputFile.endsWith('.d.ts')) {
+    if (RE_DTS.test(outputFile)) {
       if (!fsSystem.fileExists(outputFile)) {
         console.warn(`[rolldown-plugin-dts] Unable to read file ${outputFile}`)
         continue
@@ -80,7 +81,7 @@ export function tscEmitBuild(tscOptions: TscOptions): TscResult {
       continue
     }
 
-    if (outputFile.endsWith('.d.ts.map')) {
+    if (RE_DTS_MAP.test(outputFile)) {
       if (!fsSystem.fileExists(outputFile)) {
         continue
       }
