fixed watch mode

src/build.ts

@@ -1,4 +1,4 @@
-import { buildSync, BuildFailure, BuildOptions, BuildResult } from 'esbuild'
+import { BuildFailure, BuildOptions, BuildResult, build } from 'esbuild'
 import { existsSync, writeFileSync, unlinkSync } from 'fs'
 import { UserScriptMetaFull } from './types'
 import readMeta from './readmeta'
@@ -10,7 +10,7 @@ export interface runBuildResult {
     error: string | null
 }
 
-export default function runBuild(
+export default async function runBuild(
     name: string,
     watchCallback: (result: runBuildResult) => void
 ) {
@@ -18,7 +18,7 @@ export default function runBuild(
     let { meta, metaString } = readMeta(name)
     let paths = AllPaths.script(name)
 
-    let result = runEsbuild(
+    let result = await runEsbuild(
         {
             entryPoints: [paths.main],
             outfile: paths.dist,
@@ -63,10 +63,10 @@ interface RunEsbuildResult {
     errorRaw?: BuildFailure
 }
 
-function runEsbuild(
+async function runEsbuild(
     opts: BuildOptions,
     watchCallback: (result: RunEsbuildResult) => void
-): RunEsbuildResult {
+): Promise<RunEsbuildResult> {
     opts.write = false
     if (CLIArgs.watch) {
         opts.watch = {
@@ -77,7 +77,7 @@ function runEsbuild(
     }
 
     try {
-        let res = buildSync(opts)
+        let res = await build(opts)
         return getResult(null, res)
     } catch (err) {
         return getResult(err as BuildFailure, null)