build(watcher): added build:watch script

package.json

@@ -28,7 +28,8 @@
   },
   "types": "./dist/index.d.ts",
   "scripts": {
-    "build": "bun run scripts/build.ts",
+    "build": "bun run scripts/build-command.ts",
+    "build:watch": "bun run scripts/build-watch-command.ts",
     "type-check": "tsc --noEmit",
     "type-check:watch": "bun run type-check -- --watch",
     "test": "bun test",

scripts/build-command.ts

@@ -0,0 +1,3 @@
+import build from './build'
+
+await build()

scripts/build-watch-command.ts

@@ -0,0 +1,35 @@
+/* eslint-disable no-console,security/detect-non-literal-fs-filename */
+import { watch } from 'node:fs'
+import { resolve } from 'node:path'
+import build from './build'
+
+const srcDir = resolve(import.meta.dir, '../src')
+
+try {
+  console.info('Building...')
+  await build()
+  console.info('Watching for changes...')
+} catch (error) {
+  console.error('Failed to build', error)
+}
+
+const watcher = watch(srcDir, { recursive: true }, () => {
+  console.info('Rebuilding...')
+  build()
+    .then(() => {
+      console.info('Watching for changes...')
+
+      return null
+    })
+    .catch(error => {
+      console.error('Failed to build', error)
+    })
+})
+
+process.on('SIGINT', () => {
+  // close watcher when Ctrl-C is pressed
+  console.log('Closing watcher...')
+  watcher.close()
+
+  process.exit(0)
+})

scripts/build.ts

@@ -43,5 +43,6 @@ const bundle = async (minify: boolean) => {
   }
 }
 
-await bundle(false)
-await bundle(true)
+const build = () => Promise.all([bundle(false), bundle(true)])
+
+export default build