build: separate spawn pkg entry

package.json

@@ -10,6 +10,12 @@
       "require": "./target/cjs/index.cjs",
       "import": "./target/esm/index.mjs",
       "default": "./target/esm/index.mjs"
+    },
+    "./spawn": {
+      "types": "./target/dts/spawn.d.ts",
+      "require": "./target/cjs/spawn.cjs",
+      "import": "./target/esm/spawn.mjs",
+      "default": "./target/esm/spawn.mjs"
     }
   },
   "module": "target/esm/index.mjs",
@@ -22,7 +28,7 @@
   ],
   "scripts": {
     "build": "concurrently 'npm:build:*'",
-    "build:js": "node ./src/scripts/build.mjs",
+    "build:js": "node ./src/scripts/build.mjs --entry='./src/main/ts/index.ts:./src/main/ts/spawn.ts'",
     "build:dts": "tsc --emitDeclarationOnly --outDir target/dts",
     "build:docs": "typedoc --options src/main/typedoc",
     "build:stamp": "npx buildstamp",

src/main/ts/spawn.ts

@@ -4,6 +4,8 @@ import EventEmitter from 'node:events'
 import { Readable, Writable, Stream, Transform } from 'node:stream'
 import { assign, noop } from './util.js'
 
+export * from './util.js'
+
 export type TSpawnError = any
 
 export type TSpawnResult = {

src/main/ts/util.ts

@@ -55,8 +55,8 @@ export const buildCmd = (quote: TQuote, pieces: TemplateStringsArray, args: any[
   let cmd = pieces[0], i = 0
   while (i < args.length) {
     const s = Array.isArray(args[i])
-      ? args[i].map((x: any) => quote(substitute(x))).join(' ')
-      : quote(substitute(args[i]))
+      ? args[i].map((x: any) => quote(subs(x))).join(' ')
+      : quote(subs(args[i]))
 
     cmd += s + pieces[++i]
   }

src/main/ts/x.ts

@@ -11,6 +11,7 @@ import {
 import {
   type Promisified,
   type TVoidCallback,
+  type TQuote,
   isPromiseLike,
   isStringLiteral,
   assign,
@@ -83,8 +84,6 @@ export interface TShellSync {
   (opts: TShellOptions): TShellSync
 }
 
-export type TQuote = (input: string) => string
-
 export const $: TShell = function(this: any, pieces?: any, ...args: any): any {
   const preset = this || {}