feat(dts): support emitting .d.cts.map and .d.mts.map files (#1176)

Author: Timeless0911

packages/plugin-dts/src/tsc.ts

@@ -178,13 +178,42 @@ export async function emitDts(
     if (bundle) {
       return fileName;
     }
+
+    if (fileName.endsWith('.d.ts.map')) {
+      return fileName.replace(/\.d\.ts\.map$/, `${dtsExtension}.map`);
+    }
+
     return fileName.replace(/\.d\.ts$/, dtsExtension);
   };
 
+  const updateDeclarationMapContent = (
+    fileName: string,
+    content: string,
+  ): string => {
+    if (bundle || !compilerOptions.declarationMap) {
+      return content;
+    }
+
+    if (fileName.endsWith('.d.ts')) {
+      return content.replace(
+        /(\/\/# sourceMappingURL=.+)\.d\.ts\.map/g,
+        `$1${dtsExtension}.map`,
+      );
+    }
+
+    if (fileName.endsWith('.d.ts.map')) {
+      return content.replace(/("file":"[^"]*)\.d\.ts"/g, `$1${dtsExtension}"`);
+    }
+
+    return content;
+  };
+
   const system: ts.System = {
     ...ts.sys,
     writeFile: (fileName, contents, writeByteOrderMark) => {
-      ts.sys.writeFile(renameDtsFile(fileName), contents, writeByteOrderMark);
+      const newFileName = renameDtsFile(fileName);
+      const newContents = updateDeclarationMapContent(fileName, contents);
+      ts.sys.writeFile(newFileName, newContents, writeByteOrderMark);
     },
   };
 
@@ -203,9 +232,11 @@ export async function emitDts(
           onError,
           sourceFiles,
         ) => {
+          const newFileName = renameDtsFile(fileName);
+          const newContents = updateDeclarationMapContent(fileName, contents);
           originHost.writeFile(
-            renameDtsFile(fileName),
-            contents,
+            newFileName,
+            newContents,
             writeByteOrderMark,
             onError,
             sourceFiles,
@@ -254,9 +285,11 @@ export async function emitDts(
           onError,
           sourceFiles,
         ) => {
+          const newFileName = renameDtsFile(fileName);
+          const newContents = updateDeclarationMapContent(fileName, contents);
           originHost.writeFile(
-            renameDtsFile(fileName),
-            contents,
+            newFileName,
+            newContents,
             writeByteOrderMark,
             onError,
             sourceFiles,

pnpm-lock.yaml

@@ -0,0 +1,6 @@
+{
+  "name": "dts-build-declaration-map-test",
+  "version": "1.0.0",
+  "private": true,
+  "type": "module"
+}

tests/integration/dts/build/declaration-map/package.json

@@ -0,0 +1,27 @@
+import { defineConfig } from '@rslib/core';
+import { generateBundleCjsConfig, generateBundleEsmConfig } from 'test-helper';
+
+export default defineConfig({
+  lib: [
+    generateBundleEsmConfig({
+      bundle: false,
+      dts: {
+        autoExtension: true,
+        build: true,
+      },
+      source: {
+        tsconfigPath: './tsconfig.esm.json',
+      },
+    }),
+    generateBundleCjsConfig({
+      bundle: false,
+      dts: {
+        autoExtension: true,
+        build: true,
+      },
+      source: {
+        tsconfigPath: './tsconfig.cjs.json',
+      },
+    }),
+  ],
+});

tests/integration/dts/build/declaration-map/rslib.config.ts

@@ -0,0 +1 @@
+export const a = 1;

tests/integration/dts/build/declaration-map/src/index.ts

@@ -0,0 +1,16 @@
+{
+  "extends": "@rslib/tsconfig/base",
+  "compilerOptions": {
+    "baseUrl": "./",
+    "rootDir": "src",
+    "declaration": true,
+    "declarationMap": true,
+    "declarationDir": "./dist/cjs"
+  },
+  "include": ["src"],
+  "references": [
+    {
+      "path": "../__references__"
+    }
+  ]
+}

tests/integration/dts/build/declaration-map/tsconfig.cjs.json

@@ -0,0 +1,16 @@
+{
+  "extends": "@rslib/tsconfig/base",
+  "compilerOptions": {
+    "baseUrl": "./",
+    "rootDir": "src",
+    "declaration": true,
+    "declarationMap": true,
+    "declarationDir": "./dist/esm"
+  },
+  "include": ["src"],
+  "references": [
+    {
+      "path": "../__references__"
+    }
+  ]
+}

tests/integration/dts/build/declaration-map/tsconfig.esm.json

@@ -0,0 +1,6 @@
+{
+  "name": "dts-bundle-false-declaration-map-test",
+  "version": "1.0.0",
+  "private": true,
+  "type": "module"
+}

tests/integration/dts/bundle-false/declaration-map/package.json

@@ -0,0 +1,19 @@
+import { defineConfig } from '@rslib/core';
+import { generateBundleCjsConfig, generateBundleEsmConfig } from 'test-helper';
+
+export default defineConfig({
+  lib: [
+    generateBundleEsmConfig({
+      bundle: false,
+      dts: {
+        autoExtension: true,
+      },
+    }),
+    generateBundleCjsConfig({
+      bundle: false,
+      dts: {
+        autoExtension: true,
+      },
+    }),
+  ],
+});

tests/integration/dts/bundle-false/declaration-map/rslib.config.ts

@@ -0,0 +1 @@
+export const a = 1;