refactor: vite ssr compat

src/node/alias.ts

@@ -18,7 +18,6 @@ export const SITE_DATA_ID = '@siteData'
 export const SITE_DATA_REQUEST_PATH = '/' + SITE_DATA_ID
 
 export function resolveAliases(
-  root: string,
   themeDir: string,
   userConfig: UserConfig
 ): AliasOptions {

src/node/build/bundle.ts

@@ -3,7 +3,7 @@ import path from 'path'
 import slash from 'slash'
 import { APP_PATH } from '../alias'
 import { SiteConfig } from '../config'
-import { RollupOutput, ExternalOption } from 'rollup'
+import { RollupOutput } from 'rollup'
 import { build, BuildOptions, UserConfig as ViteUserConfig } from 'vite'
 import { createVitePressPlugin } from '../plugin'
 
@@ -38,8 +38,12 @@ export async function bundle(
     root,
     logLevel: 'warn',
     plugins: createVitePressPlugin(root, config, ssr, pageToHashMap),
+    ssr: {
+      noExternal: ['vitepress']
+    },
     build: {
       ...options,
+      emptyOutDir: true,
       ssr,
       base: config.site.base,
       outDir: ssr ? config.tempDir : config.outDir,
@@ -47,20 +51,13 @@ export async function bundle(
       rollupOptions: {
         ...rollupOptions,
         input,
-        external: ssr
-          ? resolveExternal(rollupOptions?.external)
-          : rollupOptions?.external,
         // important so that each page chunk and the index export things for each
         // other
         preserveEntrySignatures: 'allow-extension',
         output: {
           ...rollupOptions?.output,
           ...(ssr
-            ? {
-                format: 'cjs',
-                exports: 'named',
-                entryFileNames: '[name].js'
-              }
+            ? {}
             : {
                 chunkFileNames(chunk): string {
                   if (!chunk.isEntry && /runtime/.test(chunk.name)) {
@@ -97,24 +94,3 @@ export async function bundle(
 
   return [clientResult, serverResult, pageToHashMap]
 }
-
-function resolveExternal(
-  userExternal: ExternalOption | undefined
-): ExternalOption {
-  const required = ['vue', /^@vue\//]
-  if (!userExternal) {
-    return required
-  }
-  if (Array.isArray(userExternal)) {
-    return [...required, ...userExternal]
-  } else if (typeof userExternal === 'function') {
-    return (src, importer, isResolved) => {
-      if (src === 'vue' || /^@vue\//.test(src)) {
-        return true
-      }
-      return userExternal(src, importer, isResolved)
-    }
-  } else {
-    return [...required, userExternal]
-  }
-}

src/node/config.ts

@@ -59,7 +59,7 @@ export async function resolveConfig(
     outDir: resolve(root, 'dist'),
     tempDir: path.resolve(APP_PATH, 'temp'),
     markdown: userConfig.markdown,
-    alias: resolveAliases(root, themeDir, userConfig)
+    alias: resolveAliases(themeDir, userConfig)
   }
 
   return config

src/node/plugin.ts

@@ -31,8 +31,7 @@ export function createVitePressPlugin(
   const markdownToVue = createMarkdownToVueRenderFn(root, markdown)
 
   const vuePlugin = createVuePlugin({
-    include: [/\.vue$/, /\.md$/],
-    ssr
+    include: [/\.vue$/, /\.md$/]
   })
 
   let siteData = site
@@ -73,8 +72,7 @@ export function createVitePressPlugin(
     configureServer(server) {
       // serve our index.html after vite history fallback
       return () => {
-        // @ts-ignore
-        server.app.use((req, res, next) => {
+        server.middlewares.use((req, res, next) => {
           if (req.url!.endsWith('.html')) {
             res.statusCode = 200
             res.end(