chore: partial revert "refactor: use originalFileNames/names (vitejs#18240)"

This partially reverts commit f2957c8.

Author: sapphi-red

Diff for: packages/vite/src/node/plugins/asset.ts

@@ -42,8 +42,17 @@ const inlineRE = /[?&]inline\b/
 
 const assetCache = new WeakMap<Environment, Map<string, string>>()
 
-/** a set of referenceId for entry CSS assets for each environment */
-export const cssEntriesMap = new WeakMap<Environment, Set<string>>()
+// chunk.name is the basename for the asset ignoring the directory structure
+// For the manifest, we need to preserve the original file path and isEntry
+// for CSS assets. We keep a map from referenceId to this information.
+export interface GeneratedAssetMeta {
+  originalFileName: string | undefined
+  isEntry?: boolean
+}
+export const generatedAssetsMap = new WeakMap<
+  Environment,
+  Map<string, GeneratedAssetMeta>
+>()
 
 // add own dictionary entry by directly assigning mrmime
 export function registerCustomMime(): void {
@@ -143,7 +152,7 @@ export function assetPlugin(config: ResolvedConfig): Plugin {
 
     buildStart() {
       assetCache.set(this.environment, new Map())
-      cssEntriesMap.set(this.environment, new Set())
+      generatedAssetsMap.set(this.environment, new Map())
     },
 
     resolveId(id) {
@@ -395,6 +404,8 @@ async function fileToBuiltUrl(
       originalFileName,
       source: content,
     })
+    generatedAssetsMap.get(environment)!.set(referenceId, { originalFileName })
+
     url = `__VITE_ASSET__${referenceId}__${postfix ? `$_${postfix}__` : ``}`
   }
 

Diff for: packages/vite/src/node/plugins/css.ts

@@ -89,9 +89,9 @@ import { findNearestPackageData } from '../packages'
 import { addToHTMLProxyTransformResult } from './html'
 import {
   assetUrlRE,
-  cssEntriesMap,
   fileToDevUrl,
   fileToUrl,
+  generatedAssetsMap,
   publicAssetUrlCache,
   publicAssetUrlRE,
   publicFileToBuiltUrl,
@@ -470,9 +470,7 @@ export function cssPostPlugin(config: ResolvedConfig): RolldownPlugin {
         assetFileNames({
           type: 'asset',
           name: cssAssetName,
-          names: [cssAssetName],
           originalFileName: null,
-          originalFileNames: [],
           source: '/* vite internal call, ignore */',
         }),
       )
@@ -628,6 +626,8 @@ export function cssPostPlugin(config: ResolvedConfig): RolldownPlugin {
     },
 
     async renderChunk(code, chunk, opts) {
+      const generatedAssets = generatedAssetsMap.get(this.environment)!
+
       let chunkCSS = ''
       // the chunk is empty if it's a dynamic entry chunk that only contains a CSS import
       const isJsChunkEmpty = code === '' && !chunk.isEntry
@@ -790,6 +790,7 @@ export function cssPostPlugin(config: ResolvedConfig): RolldownPlugin {
             originalFileName,
             source: content,
           })
+          generatedAssets.set(referenceId, { originalFileName })
 
           const filename = this.getFileName(referenceId)
           getChunkMetadata(chunk)!.importedAssets.add(cleanUrl(filename))
@@ -847,9 +848,7 @@ export function cssPostPlugin(config: ResolvedConfig): RolldownPlugin {
               originalFileName,
               source: chunkCSS,
             })
-            if (isEntry) {
-              cssEntriesMap.get(this.environment)!.add(referenceId)
-            }
+            generatedAssets.set(referenceId, { originalFileName, isEntry })
             getChunkMetadata(chunk)!.importedCss.add(
               this.getFileName(referenceId),
             )

Diff for: packages/vite/src/node/plugins/html.ts

@@ -918,8 +918,7 @@ export function buildHtmlPlugin(config: ResolvedConfig): RolldownPlugin {
           const cssChunk =
             cssBundleName &&
             (Object.values(bundle).find(
-              (chunk) =>
-                chunk.type === 'asset' && chunk.names.includes(cssBundleName),
+              (chunk) => chunk.type === 'asset' && chunk.name === cssBundleName,
             ) as OutputAsset | undefined)
           if (cssChunk) {
             result = injectToHead(result, [

Diff for: packages/vite/src/node/plugins/manifest.ts

@@ -8,8 +8,8 @@ import type {
 import type { Plugin } from '../plugin'
 import { normalizePath, sortObjectKeys } from '../utils'
 import { usePerEnvironmentState } from '../environment'
-import { cssEntriesMap } from './asset'
 import { getChunkMetadata } from './metadata'
+import { generatedAssetsMap } from './asset'
 
 const endsWithJSRE = /\.[cm]?js$/
 
@@ -131,15 +131,18 @@ export function manifestPlugin(): Plugin {
         return manifestChunk
       }
 
-      const entryCssReferenceIds = cssEntriesMap.get(this.environment)!
-      const entryCssAssetFileNames = new Set(entryCssReferenceIds)
-      for (const id of entryCssReferenceIds) {
-        try {
-          const fileName = this.getFileName(id)
-          entryCssAssetFileNames.add(fileName)
-        } catch {
-          // The asset was generated as part of a different output option.
-          // It was already handled during the previous run of this plugin.
+      const assets = generatedAssetsMap.get(this.environment)!
+      const entryCssAssetFileNames = new Set()
+      for (const [id, asset] of assets.entries()) {
+        if (asset.isEntry) {
+          try {
+            const fileName = this.getFileName(id)
+            entryCssAssetFileNames.add(fileName)
+          } catch {
+            // The asset was generated as part of a different output option.
+            // It was already handled during the previous run of this plugin.
+            assets.delete(id)
+          }
         }
       }
 
@@ -149,24 +152,29 @@ export function manifestPlugin(): Plugin {
         const chunk = bundle[file]
         if (chunk.type === 'chunk') {
           manifest[getChunkName(chunk)] = createChunk(chunk)
-        } else if (chunk.type === 'asset' && chunk.names.length > 0) {
+        } else if (chunk.type === 'asset' && typeof chunk.name === 'string') {
           // Add every unique asset to the manifest, keyed by its original name
           const src =
-            chunk.originalFileNames.length > 0
-              ? chunk.originalFileNames[0]
-              : '_' + path.basename(chunk.fileName)
+            chunk.originalFileName ?? '_' + path.basename(chunk.fileName)
           const isEntry = entryCssAssetFileNames.has(chunk.fileName)
           const asset = createAsset(chunk, src, isEntry)
 
           // If JS chunk and asset chunk are both generated from the same source file,
           // prioritize JS chunk as it contains more information
           const file = manifest[src]?.file
-          if (!(file && endsWithJSRE.test(file))) {
-            manifest[src] = asset
-            fileNameToAsset.set(chunk.fileName, asset)
-          }
+          if (file && endsWithJSRE.test(file)) continue
+
+          manifest[src] = asset
+          fileNameToAsset.set(chunk.fileName, asset)
+        }
+      }
 
-          for (const originalFileName of chunk.originalFileNames.slice(1)) {
+      // Add deduplicated assets to the manifest
+      for (const [referenceId, { originalFileName }] of assets.entries()) {
+        if (originalFileName && !manifest[originalFileName]) {
+          const fileName = this.getFileName(referenceId)
+          const asset = fileNameToAsset.get(fileName)
+          if (asset) {
             manifest[originalFileName] = asset
           }
         }

Diff for: packages/vite/src/node/plugins/worker.ts

@@ -23,9 +23,7 @@ import { fileToUrl } from './asset'
 
 type WorkerBundleAsset = {
   fileName: string
-  /** @deprecated */
   originalFileName: string | null
-  originalFileNames: string[]
   source: string | Uint8Array
 }
 
@@ -129,7 +127,6 @@ async function bundleWorkerEntry(
         saveEmitWorkerAsset(config, {
           fileName: outputChunk.fileName,
           originalFileName: null,
-          originalFileNames: [],
           source: outputChunk.code,
         })
       }
@@ -168,7 +165,6 @@ function emitSourcemapForWorkerEntry(
       saveEmitWorkerAsset(config, {
         fileName: mapFileName,
         originalFileName: null,
-        originalFileNames: [],
         source: data,
       })
     }
@@ -203,7 +199,6 @@ export async function workerFileToUrl(
     saveEmitWorkerAsset(config, {
       fileName,
       originalFileName: null,
-      originalFileNames: [],
       source: outputChunk.code,
     })
     workerMap.bundle.set(id, fileName)
@@ -499,9 +494,8 @@ export function webWorkerPlugin(config: ResolvedConfig): RolldownPlugin {
         this.emitFile({
           type: 'asset',
           fileName: asset.fileName,
+          originalFileName: asset.originalFileName,
           source: asset.source,
-          // NOTE: fileName is already generated when bundling the worker
-          //       so no need to pass originalFileNames/names
         })
       })
       workerMap.assets.clear()