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refactor: avoid splitting vendor chunk by default
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,95 @@ | ||
| import type { Plugin } from '../plugin' | ||
| import type { OutputOptions, GetManualChunk, GetModuleInfo } from 'rollup' | ||
| import { isCSSRequest } from './css' | ||
|
|
||
| // Use splitVendorChunkPlugin() to get the same manualChunks strategy as Vite 2.7 | ||
| // We don't recomment using this strategy as a general solution moving forward | ||
|
|
||
| // splitVendorChunk is a simple index/vendor strategy that was used in Vite | ||
| // until v2.8. It is exposed to let people continue to use it in case it was | ||
| // working well for their setups. | ||
| // The cache needs to be reset on buildStart for watch mode to work correctly | ||
| // Don't use this manualChunks strategy for ssr, lib mode, and 'umd' or 'iife' | ||
|
|
||
| export class SplitVendorChunkCache { | ||
| cache: Map<string, boolean> | ||
| constructor() { | ||
| this.cache = new Map<string, boolean>() | ||
| } | ||
| reset() { | ||
| this.cache = new Map<string, boolean>() | ||
| } | ||
| } | ||
|
|
||
| export function splitVendorChunk({ | ||
| cache = new SplitVendorChunkCache() | ||
| }): GetManualChunk { | ||
| return (id, { getModuleInfo }) => { | ||
| if ( | ||
| id.includes('node_modules') && | ||
| !isCSSRequest(id) && | ||
| staticImportedByEntry(id, getModuleInfo, cache.cache) | ||
| ) { | ||
| return 'vendor' | ||
| } | ||
| } | ||
| } | ||
|
|
||
| function staticImportedByEntry( | ||
| id: string, | ||
| getModuleInfo: GetModuleInfo, | ||
| cache: Map<string, boolean>, | ||
| importStack: string[] = [] | ||
| ): boolean { | ||
| if (cache.has(id)) { | ||
| return cache.get(id) as boolean | ||
| } | ||
| if (importStack.includes(id)) { | ||
| // circular deps! | ||
| cache.set(id, false) | ||
| return false | ||
| } | ||
| const mod = getModuleInfo(id) | ||
| if (!mod) { | ||
| cache.set(id, false) | ||
| return false | ||
| } | ||
|
|
||
| if (mod.isEntry) { | ||
| cache.set(id, true) | ||
| return true | ||
| } | ||
| const someImporterIs = mod.importers.some((importer) => | ||
| staticImportedByEntry( | ||
| importer, | ||
| getModuleInfo, | ||
| cache, | ||
| importStack.concat(id) | ||
| ) | ||
| ) | ||
| cache.set(id, someImporterIs) | ||
| return someImporterIs | ||
| } | ||
|
|
||
| export function splitVendorChunkPlugin(): Plugin { | ||
| const cache = new SplitVendorChunkCache() | ||
| return { | ||
| name: 'vite:split-vendor-chunk', | ||
| config(config) { | ||
| const build = config.build ?? {} | ||
| const format = (build.rollupOptions?.output as OutputOptions)?.format | ||
| if (!build.ssr && !build.lib && format !== 'umd' && format !== 'iife') { | ||
| return { | ||
| build: { | ||
| rollupOptions: { | ||
| manualChunks: splitVendorChunk({ cache }) | ||
| } | ||
| } | ||
| } | ||
| } | ||
| }, | ||
| buildStart() { | ||
| cache.reset() | ||
| } | ||
| } | ||
| } |