fix: revert "fix(plugin-vue): distinguish HMR and transform descriptor (#227)"

This reverts commit aa2b59d.

Fixes vuejs/vitepress#2801

Author: haoqunjiang

packages/plugin-vue/src/handleHotUpdate.ts

@@ -6,7 +6,7 @@ import { isCSSRequest } from 'vite'
 import {
   createDescriptor,
   getDescriptor,
-  invalidateDescriptor,
+  setPrevDescriptor,
 } from './utils/descriptorCache'
 import {
   getResolvedScript,
@@ -26,14 +26,16 @@ export async function handleHotUpdate(
   { file, modules, read }: HmrContext,
   options: ResolvedOptions,
 ): Promise<ModuleNode[] | void> {
-  const prevDescriptor = getDescriptor(file, options, false, true)
+  const prevDescriptor = getDescriptor(file, options, false)
   if (!prevDescriptor) {
     // file hasn't been requested yet (e.g. async component)
     return
   }
 
+  setPrevDescriptor(file, prevDescriptor)
+
   const content = await read()
-  const { descriptor } = createDescriptor(file, content, options, true)
+  const { descriptor } = createDescriptor(file, content, options)
 
   let needRerender = false
   const affectedModules = new Set<ModuleNode | undefined>()
@@ -148,9 +150,6 @@ export async function handleHotUpdate(
     updateType.push(`style`)
   }
   if (updateType.length) {
-    // invalidate the descriptor cache so that the next transform will
-    // re-analyze the file and pick up the changes.
-    invalidateDescriptor(file)
     debug(`[vue:update(${updateType.join('&')})] ${file}`)
   }
   return [...affectedModules].filter(Boolean) as ModuleNode[]

packages/plugin-vue/src/main.ts

@@ -9,7 +9,6 @@ import { addMapping, fromMap, toEncodedMap } from '@jridgewell/gen-mapping'
 import { normalizePath, transformWithEsbuild } from 'vite'
 import {
   createDescriptor,
-  getDescriptor,
   getPrevDescriptor,
   setSrcDescriptor,
 } from './utils/descriptorCache'
@@ -36,12 +35,10 @@ export async function transformMain(
 ) {
   const { devServer, isProduction, devToolsEnabled } = options
 
+  // prev descriptor is only set and used for hmr
   const prevDescriptor = getPrevDescriptor(filename)
   const { descriptor, errors } = createDescriptor(filename, code, options)
 
-  // set descriptor for HMR if it's not set yet
-  getDescriptor(filename, options, true, true)
-
   if (errors.length) {
     errors.forEach((error) =>
       pluginContext.error(createRollupError(filename, error)),

packages/plugin-vue/src/utils/descriptorCache.ts

@@ -12,14 +12,12 @@ export interface SFCParseResult {
 }
 
 export const cache = new Map<string, SFCDescriptor>()
-export const hmrCache = new Map<string, SFCDescriptor>()
 const prevCache = new Map<string, SFCDescriptor | undefined>()
 
 export function createDescriptor(
   filename: string,
   source: string,
   { root, isProduction, sourceMap, compiler }: ResolvedOptions,
-  hmr = false,
 ): SFCParseResult {
   const { descriptor, errors } = compiler.parse(source, {
     filename,
@@ -30,39 +28,35 @@ export function createDescriptor(
   // project (relative to root) and on different systems.
   const normalizedPath = slash(path.normalize(path.relative(root, filename)))
   descriptor.id = getHash(normalizedPath + (isProduction ? source : ''))
-  ;(hmr ? hmrCache : cache).set(filename, descriptor)
+
+  cache.set(filename, descriptor)
   return { descriptor, errors }
 }
 
 export function getPrevDescriptor(filename: string): SFCDescriptor | undefined {
   return prevCache.get(filename)
 }
 
-export function invalidateDescriptor(filename: string, hmr = false): void {
-  const _cache = hmr ? hmrCache : cache
-  const prev = _cache.get(filename)
-  _cache.delete(filename)
-  if (prev) {
-    prevCache.set(filename, prev)
-  }
+export function setPrevDescriptor(
+  filename: string,
+  entry: SFCDescriptor,
+): void {
+  prevCache.set(filename, entry)
 }
 
 export function getDescriptor(
   filename: string,
   options: ResolvedOptions,
   createIfNotFound = true,
-  hmr = false,
 ): SFCDescriptor | undefined {
-  const _cache = hmr ? hmrCache : cache
-  if (_cache.has(filename)) {
-    return _cache.get(filename)!
+  if (cache.has(filename)) {
+    return cache.get(filename)!
   }
   if (createIfNotFound) {
     const { descriptor, errors } = createDescriptor(
       filename,
       fs.readFileSync(filename, 'utf-8'),
       options,
-      hmr,
     )
     if (errors.length) {
       throw errors[0]