fix: kill sub-process for onSuccess

closes #364

Author: sxzz

package.json

@@ -95,6 +95,7 @@
     "semver": "catalog:prod",
     "tinyexec": "catalog:prod",
     "tinyglobby": "catalog:prod",
+    "tree-kill": "catalog:prod",
     "unconfig": "catalog:prod"
   },
   "devDependencies": {

pnpm-lock.yaml

@@ -49,6 +49,7 @@ catalogs:
     semver: ^7.7.2
     tinyexec: ^1.0.1
     tinyglobby: ^0.2.14
+    tree-kill: ^1.2.2
     unconfig: ^7.3.2
 
 ignoredBuiltDependencies:

pnpm-workspace.yaml

@@ -9,6 +9,7 @@ import {
   type RolldownPluginOption,
 } from 'rolldown'
 import { exec } from 'tinyexec'
+import treeKill from 'tree-kill'
 import { attw } from './features/attw'
 import { cleanOutDir } from './features/clean'
 import { copy } from './features/copy'
@@ -172,14 +173,18 @@ export async function buildSingle(
         nodeOptions: {
           shell: true,
           stdio: 'inherit',
-          signal: ab.signal,
         },
       })
       p.then(({ exitCode }) => {
         if (exitCode) {
           process.exitCode = exitCode
         }
       })
+      ab.signal.addEventListener('abort', () => {
+        if (typeof p.pid === 'number') {
+          treeKill(p.pid)
+        }
+      })
     } else {
       await onSuccess?.(config, ab.signal)
     }