fix(loader): debounced write config

packages/koishi/src/cli/start.ts

@@ -60,6 +60,7 @@ function createWorker(options: Dict<any>) {
     if (message.type === 'start') {
       config = message.body
       timer = config.heartbeatTimeout && setTimeout(() => {
+        // eslint-disable-next-line no-console
         console.log(kleur.red('daemon: heartbeat timeout'))
         child.kill('SIGKILL')
       }, config.heartbeatTimeout)
@@ -128,6 +129,7 @@ export default function (cli: CAC) {
     .action((file, options) => {
       const { logLevel, debug, logTime, ...rest } = options
       if (logLevel !== undefined && (!isInteger(logLevel) || logLevel < 0)) {
+        // eslint-disable-next-line no-console
         console.warn(`${kleur.red('error')} log level should be a positive integer.`)
         process.exit(1)
       }

packages/loader/src/shared.ts

@@ -145,7 +145,8 @@ export abstract class Loader {
 
   private store = new WeakMap<any, string>()
 
-  private _writeTimer: undefined | number | NodeJS.Timeout
+  private _writeTask?: Promise<void>
+  private _writeSlient = true
 
   abstract import(name: string): Promise<any>
   abstract fullReload(code?: number): void
@@ -260,10 +261,13 @@ export abstract class Loader {
     if (!silent) this.app.emit('config')
   }
 
-  async writeConfig(silent = false) {
-    clearTimeout(this._writeTimer)
-    return new Promise<void>((resolve, reject) => {
-      this._writeTimer = setTimeout(() => {
+  writeConfig(silent = false) {
+    this._writeSlient &&= silent
+    if (this._writeTask) return this._writeTask
+    return this._writeTask = new Promise((resolve, reject) => {
+      setTimeout(() => {
+        this._writeSlient = true
+        this._writeTask = undefined
         this._writeConfig(silent).then(resolve, reject)
       }, 0)
     })