feat: let detached opt be configurable (google#782)

* feat: let detached opt be configurable

closes google#781

* fix: set `datached` opt to false by default

Author: antongolub

src/core.ts

@@ -69,6 +69,7 @@ export interface Options {
   postfix: string
   quote: typeof quote
   quiet: boolean
+  detached: boolean
   spawn: typeof spawn
   spawnSync: typeof spawnSync
   log: typeof log
@@ -102,12 +103,12 @@ export const defaults: Options = {
   prefix: '',
   postfix: '',
   quote: noquote,
+  detached: false,
   spawn,
   spawnSync,
   log,
   kill,
 }
-const isWin = process.platform == 'win32'
 
 export function usePowerShell() {
   $.shell = which.sync('powershell.exe')
@@ -256,7 +257,7 @@ export class ProcessPromise extends Promise<ProcessOutput> {
       spawnSync: $.spawnSync,
       stdio: self._stdio ?? $.stdio,
       sync: $[syncExec],
-      detached: !isWin,
+      detached: $.detached,
       run: (cb) => cb(),
       on: {
         start: () => {

test/core.test.js

@@ -318,7 +318,7 @@ describe('core', () => {
   })
 
   test('abort() method works', async () => {
-    const p = $`sleep 9999`
+    const p = $({ detached: true })`sleep 999`
     setTimeout(() => p.abort(), 100)
 
     try {
@@ -331,7 +331,7 @@ describe('core', () => {
 
   test('accepts optional AbortController', async () => {
     const ac = new AbortController()
-    const p = $({ ac })`sleep 9999`
+    const p = $({ ac, detached: true })`sleep 999`
     setTimeout(() => ac.abort(), 100)
 
     try {
@@ -345,7 +345,7 @@ describe('core', () => {
   test('accepts AbortController `signal` separately', async () => {
     const ac = new AbortController()
     const signal = ac.signal
-    const p = $({ signal })`sleep 9999`
+    const p = $({ signal, detached: true })`sleep 999`
     setTimeout(() => ac.abort(), 100)
 
     try {
@@ -357,7 +357,7 @@ describe('core', () => {
   })
 
   test('kill() method works', async () => {
-    let p = $`sleep 9999`.nothrow()
+    let p = $`sleep 999`.nothrow()
     setTimeout(() => {
       p.kill()
     }, 100)
@@ -471,7 +471,7 @@ describe('core', () => {
   test('timeout() works', async () => {
     let exitCode, signal
     try {
-      await $`sleep 9999`.timeout(10, 'SIGKILL')
+      await $`sleep 999`.timeout(10, 'SIGKILL')
     } catch (p) {
       exitCode = p.exitCode
       signal = p.signal