feat(core): add watchers parameter to onWatched hook

Author: meteorlxy

docs/.vuepress/config.ts

@@ -171,16 +171,16 @@ const config: UserConfig<DefaultThemeOptions> = {
 
   evergreen: process.env.NODE_ENV !== 'production',
 
-  onWatched: (_, restart) => {
+  onWatched: (_, watchers, restart) => {
     const watcher = chokidar.watch('configs/**/*.ts', {
       cwd: __dirname,
       ignoreInitial: true,
     })
     watcher.on('change', async (file) => {
       logger.info(`file ${chalk.magenta(file)} is modified`)
-      await watcher.close()
       await restart()
     })
+    watchers.push(watcher)
   },
 }
 

packages/@vuepress/cli/src/commands/dev/dev.ts

@@ -119,5 +119,5 @@ export const dev = async (
     watchers.push(configWatcher)
   }
 
-  await app.pluginApi.hooks.onWatched.process(app, restart)
+  await app.pluginApi.hooks.onWatched.process(app, watchers, restart)
 }

packages/@vuepress/core/src/types/plugin-api/hooks.ts

@@ -4,6 +4,7 @@ import type { Page } from '../page'
 
 // util type
 type PromiseOrNot<T> = Promise<T> | T
+type Closable = { close(): void }
 
 // base hook type
 export type Hook<
@@ -51,7 +52,7 @@ export type ExtendsPageDataHook = Hook<
 export interface Hooks {
   onInitialized: LifeCycleHook
   onPrepared: LifeCycleHook
-  onWatched: LifeCycleHook<[restart: () => Promise<void>]>
+  onWatched: LifeCycleHook<[watchers: Closable[], restart: () => Promise<void>]>
   onGenerated: LifeCycleHook
   extendsMarkdown: ExtendsMarkdownHook
   extendsPageData: ExtendsPageDataHook