aleclarson · aleclarson · Feb 22, 2022 · Feb 22, 2022
diff --git a/packages/vite/src/node/index.ts b/packages/vite/src/node/index.ts
@@ -58,6 +58,7 @@ export type {
   HtmlTagDescriptor
 } from './plugins/html'
 export type { CSSOptions, CSSModulesOptions } from './plugins/css'
+export type { ChunkMetadata } from './plugins/metadata'
 export type { JsonOptions } from './plugins/json'
 export type { TransformOptions as EsbuildTransformOptions } from 'esbuild'
 export type { ESBuildOptions, ESBuildTransformResult } from './plugins/esbuild'
@@ -92,9 +93,10 @@ export type { RollupCommonJSOptions } from 'types/commonjs'
 export type { RollupDynamicImportVarsOptions } from 'types/dynamicImportVars'
 export type { Matcher, AnymatchPattern, AnymatchFn } from 'types/anymatch'
 
+import type { ChunkMetadata } from './plugins/metadata'
+
 declare module 'rollup' {
   export interface RenderedChunk {
-    importedAssets: Set<string>
-    importedCss: Set<string>
+    viteMetadata: ChunkMetadata
   }
 }
diff --git a/packages/vite/src/node/plugins/asset.ts b/packages/vite/src/node/plugins/asset.ts
@@ -77,8 +77,6 @@ export function assetPlugin(config: ResolvedConfig): Plugin {
     },
 
     renderChunk(code, chunk) {
-      chunk.importedAssets = new Set()
-
       let match: RegExpExecArray | null
       let s: MagicString | undefined
 
@@ -96,7 +94,7 @@ export function assetPlugin(config: ResolvedConfig): Plugin {
         // some internal plugins may still need to emit chunks (e.g. worker) so
         // fallback to this.getFileName for that.
         const file = getAssetFilename(hash, config) || this.getFileName(hash)
-        chunk.importedAssets.add(cleanUrl(file))
+        chunk.viteMetadata.importedAssets.add(cleanUrl(file))
         const outputFilepath = config.base + file + postfix
         s.overwrite(match.index, match.index + full.length, outputFilepath)
       }

diff --git a/packages/vite/src/node/plugins/css.ts b/packages/vite/src/node/plugins/css.ts
@@ -364,8 +364,6 @@ export function cssPostPlugin(config: ResolvedConfig): Plugin {
         }
       }
 
-      chunk.importedCss = new Set()
-
       if (!chunkCSS) {
         return null
       }
@@ -386,7 +384,7 @@ export function cssPostPlugin(config: ResolvedConfig): Plugin {
         const isRelativeBase = config.base === '' || config.base.startsWith('.')
         css = css.replace(assetUrlRE, (_, fileHash, postfix = '') => {
           const filename = getAssetFilename(fileHash, config) + postfix
-          chunk.importedAssets.add(cleanUrl(filename))
+          chunk.viteMetadata.importedAssets.add(cleanUrl(filename))
           if (!isRelativeBase || inlined) {
             // absolute base or relative base but inlined (injected as style tag into
             // index.html) use the base as-is
@@ -423,7 +421,7 @@ export function cssPostPlugin(config: ResolvedConfig): Plugin {
             type: 'asset',
             source: chunkCSS
           })
-          chunk.importedCss.add(this.getFileName(fileHandle))
+          chunk.viteMetadata.importedCss.add(this.getFileName(fileHandle))
         } else if (!config.build.ssr) {
           // legacy build, inline css
           chunkCSS = await processChunkCSS(chunkCSS, {
@@ -481,8 +479,12 @@ export function cssPostPlugin(config: ResolvedConfig): Plugin {
             // chunks instead.
             chunk.imports = chunk.imports.filter((file) => {
               if (pureCssChunks.has(file)) {
-                const { importedCss } = bundle[file] as OutputChunk
-                importedCss.forEach((file) => chunk.importedCss.add(file))
+                const {
+                  viteMetadata: { importedCss }
+                } = bundle[file] as OutputChunk
+                importedCss.forEach((file) =>
+                  chunk.viteMetadata.importedCss.add(file)
+                )
                 return false
               }
               return true

diff --git a/packages/vite/src/node/plugins/html.ts b/packages/vite/src/node/plugins/html.ts
@@ -532,7 +532,7 @@ export function buildHtmlPlugin(config: ResolvedConfig): Plugin {
           })
         }
 
-        chunk.importedCss.forEach((file) => {
+        chunk.viteMetadata.importedCss.forEach((file) => {
           if (!seen.has(file)) {
             seen.add(file)
             tags.push({

diff --git a/packages/vite/src/node/plugins/importAnalysisBuild.ts b/packages/vite/src/node/plugins/importAnalysisBuild.ts
@@ -277,7 +277,7 @@ export function buildImportAnalysisPlugin(config: ResolvedConfig): Plugin {
                   const chunk = bundle[filename] as OutputChunk | undefined
                   if (chunk) {
                     deps.add(chunk.fileName)
-                    chunk.importedCss.forEach((file) => {
+                    chunk.viteMetadata.importedCss.forEach((file) => {
                       deps.add(file)
                     })
                     chunk.imports.forEach(addDeps)
@@ -286,8 +286,8 @@ export function buildImportAnalysisPlugin(config: ResolvedConfig): Plugin {
                       removedPureCssFilesCache.get(config)!
                     const chunk = removedPureCssFiles.get(filename)
                     if (chunk) {
-                      if (chunk.importedCss.size) {
-                        chunk.importedCss.forEach((file) => {
+                      if (chunk.viteMetadata.importedCss.size) {
+                        chunk.viteMetadata.importedCss.forEach((file) => {
                           deps.add(file)
                         })
                         hasRemovedPureCssChunk = true

diff --git a/packages/vite/src/node/plugins/index.ts b/packages/vite/src/node/plugins/index.ts
@@ -16,6 +16,7 @@ import { preAliasPlugin } from './preAlias'
 import { definePlugin } from './define'
 import { ssrRequireHookPlugin } from './ssrRequireHook'
 import { workerImportMetaUrlPlugin } from './workerImportMetaUrl'
+import { metadataPlugin } from './metadata'
 
 export async function resolvePlugins(
   config: ResolvedConfig,
@@ -30,6 +31,7 @@ export async function resolvePlugins(
     : { pre: [], post: [] }
 
   return [
+    isBuild ? metadataPlugin() : null,
     isBuild ? null : preAliasPlugin(),
     aliasPlugin({ entries: config.resolve.alias }),
     ...prePlugins,

diff --git a/packages/vite/src/node/plugins/manifest.ts b/packages/vite/src/node/plugins/manifest.ts
@@ -88,11 +88,11 @@ export function manifestPlugin(config: ResolvedConfig): Plugin {
           }
         }
 
-        if (chunk.importedCss.size) {
-          manifestChunk.css = [...chunk.importedCss]
+        if (chunk.viteMetadata.importedCss.size) {
+          manifestChunk.css = [...chunk.viteMetadata.importedCss]
         }
-        if (chunk.importedAssets.size) {
-          manifestChunk.assets = [...chunk.importedAssets]
+        if (chunk.viteMetadata.importedAssets.size) {
+          manifestChunk.assets = [...chunk.viteMetadata.importedAssets]
         }
 
         return manifestChunk

diff --git a/packages/vite/src/node/plugins/metadata.ts b/packages/vite/src/node/plugins/metadata.ts
@@ -0,0 +1,23 @@
+import type { Plugin } from '../plugin'
+
+export interface ChunkMetadata {
+  importedAssets: Set<string>
+  importedCss: Set<string>
+}
+
+/**
+ * Prepares the rendered chunks to contain additional metadata during build.
+ */
+export function metadataPlugin(): Plugin {
+  return {
+    name: 'vite:build-metadata',
+
+    async renderChunk(_code, chunk) {
+      chunk.viteMetadata = {
+        importedAssets: new Set(),
+        importedCss: new Set()
+      }
+      return null
+    }
+  }
+}
diff --git a/packages/vite/src/node/ssr/ssrManifestPlugin.ts b/packages/vite/src/node/ssr/ssrManifestPlugin.ts
@@ -26,11 +26,11 @@ export function ssrManifestPlugin(config: ResolvedConfig): Plugin {
               mappedChunks.push(base + chunk.fileName)
               // <link> tags for entry chunks are already generated in static HTML,
               // so we only need to record info for non-entry chunks.
-              chunk.importedCss.forEach((file) => {
+              chunk.viteMetadata.importedCss.forEach((file) => {
                 mappedChunks.push(base + file)
               })
             }
-            chunk.importedAssets.forEach((file) => {
+            chunk.viteMetadata.importedAssets.forEach((file) => {
               mappedChunks.push(base + file)
             })
           }
@@ -64,7 +64,7 @@ export function ssrManifestPlugin(config: ResolvedConfig): Plugin {
                     analyzed.add(filename)
                     const chunk = bundle[filename] as OutputChunk | undefined
                     if (chunk) {
-                      chunk.importedCss.forEach((file) => {
+                      chunk.viteMetadata.importedCss.forEach((file) => {
                         deps.push(`/${file}`)
                       })
                       chunk.imports.forEach(addDeps)