fix: enhance app doesn't work due to interface change

lib/app/app.js

@@ -8,7 +8,7 @@ import dataMixin from './dataMixin'
 import store from './store'
 import { routes } from '@temp/routes'
 import { siteData } from '@temp/siteData'
-import appEnhancers from '@temp/appEnhancers.js'
+import appEnhancers from '@temp/app-enhancers.js'
 
 // suggest dev server restart on base change
 if (module.hot) {

lib/plugin-api/core/Tapable.js

@@ -11,7 +11,7 @@ module.exports = class Tapable {
    */
   tap (name, value) {
     if (Array.isArray(value)) {
-      this.items.push(value.map(i => ({ value: i, name })))
+      return this.items.push(...value.map(i => ({ value: i, name })))
     }
     this.items.push({ value, name })
   }

lib/plugin-api/option/EnhanceAppFilesOption.js

@@ -6,34 +6,36 @@ const { pathsToModuleCode } = require('../../prepare/codegen')
 const logger = require('../../util/logger')
 
 module.exports = class EnhanceAppFilesOption extends Tapable {
-  add (value, pluginName) {
+  tap (pluginName, value) {
     if (typeof value === 'function') {
       value = value()
     }
-    super.add(value, pluginName)
+    super.tap(pluginName, value)
   }
 
   async run (...args) {
     const manifest = []
 
+    console.log(this.items)
+
     // 1. write enhance app files.
     for (const [index, value] of this.items.entries()) {
-      const { filepath, pluginName } = value
+      const { value: filepath, name: pluginName } = value
       if (fs.existsSync(filepath)) {
         const destPath = await writeTemp(
-          `enhance-app-files/${index}.js`,
+          `app-enhancers/enhancer-${index}.js`,
           `export { default } from ${JSON.stringify(filepath)}`
         )
         manifest.push(destPath)
       } else {
         logger.debug(
-          chalk.gray(`[vuepress-plugin-${pluginName}]`) +
+          chalk.gray(`[vuepress-plugin-${pluginName}] `) +
           `${chalk.cyan(filepath)} Not Found.`
         )
       }
     }
 
     // 2. write entry file.
-    await writeTemp('appEnhancers.js', pathsToModuleCode(manifest))
+    await writeTemp('app-enhancers.js', pathsToModuleCode(manifest))
   }
 }

packages/vuepress-plugin-test/enhanceApp.js

-export default function (Vue) {
-  Vue.use(/**/)
+export default function ({ Vue }) {
+  console.warn('[vuepress-plugin-test] enhancing !!!')
 }