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manifest.ts
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manifest.ts
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import path from 'node:path'
import type {
InternalModuleFormat,
OutputAsset,
OutputChunk,
RenderedChunk,
} from 'rollup'
import jsonStableStringify from 'json-stable-stringify'
import type { ResolvedConfig } from '..'
import type { Plugin } from '../plugin'
import { normalizePath } from '../utils'
import { generatedAssets } from './asset'
import type { GeneratedAssetMeta } from './asset'
export type Manifest = Record<string, ManifestChunk>
export interface ManifestChunk {
src?: string
file: string
css?: string[]
assets?: string[]
isEntry?: boolean
isDynamicEntry?: boolean
imports?: string[]
dynamicImports?: string[]
}
export function manifestPlugin(config: ResolvedConfig): Plugin {
const manifest: Manifest = {}
let outputCount: number
return {
name: 'vite:manifest',
buildStart() {
outputCount = 0
},
generateBundle({ format }, bundle) {
function getChunkName(chunk: OutputChunk) {
return getChunkOriginalFileName(chunk, config.root, format)
}
function getInternalImports(imports: string[]): string[] {
const filteredImports: string[] = []
for (const file of imports) {
if (bundle[file] === undefined) {
continue
}
filteredImports.push(getChunkName(bundle[file] as OutputChunk))
}
return filteredImports
}
function createChunk(chunk: OutputChunk): ManifestChunk {
const manifestChunk: ManifestChunk = {
file: chunk.fileName,
}
if (chunk.facadeModuleId) {
manifestChunk.src = getChunkName(chunk)
}
if (chunk.isEntry) {
manifestChunk.isEntry = true
}
if (chunk.isDynamicEntry) {
manifestChunk.isDynamicEntry = true
}
if (chunk.imports.length) {
const internalImports = getInternalImports(chunk.imports)
if (internalImports.length > 0) {
manifestChunk.imports = internalImports
}
}
if (chunk.dynamicImports.length) {
const internalImports = getInternalImports(chunk.dynamicImports)
if (internalImports.length > 0) {
manifestChunk.dynamicImports = internalImports
}
}
if (chunk.viteMetadata?.importedCss.size) {
manifestChunk.css = [...chunk.viteMetadata.importedCss]
}
if (chunk.viteMetadata?.importedAssets.size) {
manifestChunk.assets = [...chunk.viteMetadata.importedAssets]
}
return manifestChunk
}
function createAsset(
asset: OutputAsset,
src: string,
isEntry?: boolean,
): ManifestChunk {
const manifestChunk: ManifestChunk = {
file: asset.fileName,
src,
}
if (isEntry) manifestChunk.isEntry = true
return manifestChunk
}
const fileNameToAssetMeta = new Map<string, GeneratedAssetMeta>()
const assets = generatedAssets.get(config)!
assets.forEach((asset, referenceId) => {
const fileName = this.getFileName(referenceId)
fileNameToAssetMeta.set(fileName, asset)
})
const fileNameToAsset = new Map<string, ManifestChunk>()
for (const file in bundle) {
const chunk = bundle[file]
if (chunk.type === 'chunk') {
manifest[getChunkName(chunk)] = createChunk(chunk)
} else if (chunk.type === 'asset' && typeof chunk.name === 'string') {
// Add every unique asset to the manifest, keyed by its original name
const assetMeta = fileNameToAssetMeta.get(chunk.fileName)
const src = assetMeta?.originalName ?? chunk.name
const asset = createAsset(chunk, src, assetMeta?.isEntry)
// If JS chunk and asset chunk are both generated from the same source file,
// prioritize JS chunk as it contains more information
if (manifest[src]?.file.endsWith('.js')) continue
manifest[src] = asset
fileNameToAsset.set(chunk.fileName, asset)
}
}
// Add deduplicated assets to the manifest
assets.forEach(({ originalName }, referenceId) => {
if (!manifest[originalName]) {
const fileName = this.getFileName(referenceId)
const asset = fileNameToAsset.get(fileName)
if (asset) {
manifest[originalName] = asset
}
}
})
outputCount++
const output = config.build.rollupOptions?.output
const outputLength = Array.isArray(output) ? output.length : 1
if (outputCount >= outputLength) {
this.emitFile({
fileName:
typeof config.build.manifest === 'string'
? config.build.manifest
: '.vite/manifest.json',
type: 'asset',
source: jsonStableStringify(manifest, { space: 2 }),
})
}
},
}
}
export function getChunkOriginalFileName(
chunk: OutputChunk | RenderedChunk,
root: string,
format: InternalModuleFormat,
): string {
if (chunk.facadeModuleId) {
let name = normalizePath(path.relative(root, chunk.facadeModuleId))
if (format === 'system' && !chunk.name.includes('-legacy')) {
const ext = path.extname(name)
const endPos = ext.length !== 0 ? -ext.length : undefined
name = name.slice(0, endPos) + `-legacy` + ext
}
return name.replace(/\0/g, '')
} else {
return `_` + path.basename(chunk.fileName)
}
}