fix: ensure parse default out dir from scaffold

Author: qmhc

README.md

@@ -362,7 +362,7 @@ export interface PluginOptions {
    *
    * Can be an array to output to multiple directories.
    *
-   * Defaults to 'build.outDir' of the Vite config, or `outDir` of tsconfig.json if using Rollup.
+   * The default is to use the out directory provided by the scaffold.
    */
   outDir?: string | string[],
 

README.zh-CN.md

@@ -379,7 +379,7 @@ export interface PluginOptions {
    *
    * 可以指定一个数组来输出到多个目录中
    *
-   * 默认为 Vite 配置的 'build.outDir'，使用 Rollup 时为 tsconfig.json 的 `outDir`
+   * 默认使用脚手架提供的输出目录
    */
   outDir?: string | string[],
 

packages/unplugin-dts/src/core/types.ts

@@ -32,15 +32,15 @@ export interface CreateRuntimeOptions {
   /**
    * Specify root directory.
    *
-   * Defaults to the 'root' of the Vite config, or `process.cwd()` if using Rollup.
+   * The default is to use the root provided by the scaffold; if none is provided, it defaults to `process.cwd()`.
    */
   root: string,
   /**
    * Output directory for declaration files.
    *
    * Can be an array to output to multiple directories.
    *
-   * Defaults to 'build.outDir' of the Vite config, or `outDir` of tsconfig.json if using Rollup.
+   * The default is to use the out directory provided by the scaffold.
    */
   outDirs?: string | string[],
   /**

packages/unplugin-dts/src/plugin.ts

@@ -120,6 +120,10 @@ export const pluginFactory: UnpluginFactory<PluginOptions | undefined> = /* #__P
       indexName = `${(fileName || 'index')}.d.ts`
     }
 
+    if (!options.outDirs && compiler.options.output.path) {
+      outDirs = [ensureAbsolute(compiler.options.output.path, root)]
+    }
+
     handleDebug('parse webpack(rspack) config')
   }