refactor: remove build time pre-bundling

docs/config/dep-optimization-options.md

@@ -64,16 +64,17 @@ Set to `true` to force dependency pre-bundling, ignoring previously cached optim
 
 ## optimizeDeps.disabled
 
+- **Deprecated**
 - **Experimental:** [Give Feedback](https://github.com/vitejs/vite/discussions/13839)
 - **Type:** `boolean | 'build' | 'dev'`
 - **Default:** `'build'`
 
-Disables dependencies optimizations, `true` disables the optimizer during build and dev. Pass `'build'` or `'dev'` to only disable the optimizer in one of the modes. Dependency optimization is enabled by default in dev only.
+This option is deprecated. As of Vite 5.1, pre-bundling of dependencies during build have been removed. Setting `optimizeDeps.disabled` to `true` or `'dev'` disables the optimizer, and configured to `false` or `'build'` leaves the optimizer during dev enabled.
 
-:::warning
-Optimizing dependencies in build mode is **experimental**. If enabled, it removes one of the most significant differences between dev and prod. [`@rollup/plugin-commonjs`](https://github.com/rollup/plugins/tree/master/packages/commonjs) is no longer needed in this case since esbuild converts CJS-only dependencies to ESM.
+Use `optimizeDeps.noDiscovery` instead to disallow automatic discovery of dependencies and leave `optimizeDeps.include` undefined or empty to disable completely the optimizer instead.
 
-If you want to try this build strategy, you can use `optimizeDeps.disabled: false`. `@rollup/plugin-commonjs` can be removed by passing `build.commonjsOptions: { include: [] }`.
+:::warning
+Optimizing dependencies during build time was an **experimental** feature. Projects trying out this strategy also removed `@rollup/plugin-commonjs` using `build.commonjsOptions: { include: [] }`. If you did so, a warning will guide you to re-enable it to support CJS only packages while bundling.
 :::
 
 ## optimizeDeps.needsInterop

package.json

@@ -26,7 +26,6 @@
     "test": "run-s test-unit test-serve test-build",
     "test-serve": "vitest run -c vitest.config.e2e.ts",
     "test-build": "VITE_TEST_BUILD=1 vitest run -c vitest.config.e2e.ts",
-    "test-build-without-plugin-commonjs": "VITE_TEST_WITHOUT_PLUGIN_COMMONJS=1 pnpm test-build",
     "test-unit": "vitest run",
     "test-docs": "pnpm run docs-build",
     "debug-serve": "VITE_DEBUG_SERVE=1 vitest run -c vitest.config.e2e.ts",

packages/vite/src/node/config.ts

@@ -466,20 +466,6 @@ export async function resolveConfig(
   const userPlugins = [...prePlugins, ...normalPlugins, ...postPlugins]
   config = await runConfigHook(config, userPlugins, configEnv)
 
-  // If there are custom commonjsOptions, don't force optimized deps for this test
-  // even if the env var is set as it would interfere with the playground specs.
-  if (
-    !config.build?.commonjsOptions &&
-    process.env.VITE_TEST_WITHOUT_PLUGIN_COMMONJS
-  ) {
-    config = mergeConfig(config, {
-      optimizeDeps: { disabled: false },
-      ssr: { optimizeDeps: { disabled: false } },
-    })
-    config.build ??= {}
-    config.build.commonjsOptions = { include: [] }
-  }
-
   // Define logger
   const logger = createLogger(config.logLevel, {
     allowClearScreen: config.clearScreen,
@@ -774,7 +760,6 @@ export async function resolveConfig(
     packageCache,
     createResolver,
     optimizeDeps: {
-      disabled: 'build',
       ...optimizeDeps,
       esbuildOptions: {
         preserveSymlinks: resolveOptions.preserveSymlinks,
@@ -810,6 +795,13 @@ export async function resolveConfig(
       .map((hook) => hook(resolved)),
   )
 
+  optimizeDepsDisabledBackwardCompatibility(resolved, resolved.optimizeDeps)
+  optimizeDepsDisabledBackwardCompatibility(
+    resolved,
+    resolved.ssr.optimizeDeps,
+    'ssr.',
+  )
+
   debug?.(`using resolved config: %O`, {
     ...resolved,
     plugins: resolved.plugins.map((p) => p.name),
@@ -1232,11 +1224,48 @@ export function isDepsOptimizerEnabled(
   config: ResolvedConfig,
   ssr: boolean,
 ): boolean {
-  const { command } = config
-  const { disabled } = getDepOptimizationConfig(config, ssr)
-  return !(
-    disabled === true ||
-    (command === 'build' && disabled === 'build') ||
-    (command === 'serve' && disabled === 'dev')
-  )
+  const optimizeDeps = getDepOptimizationConfig(config, ssr)
+  return !(optimizeDeps.noDiscovery && !optimizeDeps.include?.length)
+}
+
+function optimizeDepsDisabledBackwardCompatibility(
+  resolved: ResolvedConfig,
+  optimizeDeps: DepOptimizationConfig,
+  optimizeDepsPath: string = '',
+) {
+  const optimizeDepsDisabled = optimizeDeps.disabled
+  if (optimizeDepsDisabled !== undefined) {
+    if (optimizeDepsDisabled === true || optimizeDepsDisabled === 'dev') {
+      const commonjsOptionsInclude = resolved.build?.commonjsOptions?.include
+      const commonjsPluginDisabled =
+        Array.isArray(commonjsOptionsInclude) &&
+        commonjsOptionsInclude.length === 0
+      optimizeDeps.noDiscovery = true
+      optimizeDeps.include = undefined
+      if (commonjsPluginDisabled) {
+        resolved.build.commonjsOptions.include = undefined
+      }
+      resolved.logger.warn(
+        colors.yellow(`(!) Experimental ${optimizeDepsPath}optimizeDeps.disabled and deps pre-bundling during build were removed in Vite 5.1.
+    To disable the deps optimizer, set ${optimizeDepsPath}optimizeDeps.noDiscovery to true and ${optimizeDepsPath}optimizeDeps.include as undefined or empty. 
+    Please remove ${optimizeDepsPath}optimizeDeps.disabled from your config.
+    ${
+      commonjsPluginDisabled
+        ? 'Empty config.build.commonjsOptions.include will be ignored to support CJS during build. This config should also be removed.'
+        : ''
+    }
+  `),
+      )
+    } else if (
+      optimizeDepsDisabled === false ||
+      optimizeDepsDisabled === 'build'
+    ) {
+      resolved.logger.warn(
+        colors.yellow(`(!) Experimental ${optimizeDepsPath}optimizeDeps.disabled and deps pre-bundling during build were removed in Vite 5.1.
+    Setting it to ${optimizeDepsDisabled} now has no effect.
+    Please remove ${optimizeDepsPath}optimizeDeps.disabled from your config.
+  `),
+      )
+    }
+  }
 }

packages/vite/src/node/optimizer/index.ts

@@ -8,11 +8,9 @@ import type { BuildContext, BuildOptions as EsbuildBuildOptions } from 'esbuild'
 import esbuild, { build } from 'esbuild'
 import { init, parse } from 'es-module-lexer'
 import glob from 'fast-glob'
-import { createFilter } from '@rollup/pluginutils'
 import { getDepOptimizationConfig } from '../config'
 import type { ResolvedConfig } from '../config'
 import {
-  arraify,
   createDebugger,
   flattenId,
   getHash,
@@ -58,9 +56,6 @@ export interface DepsOptimizer {
   isOptimizedDepUrl: (url: string) => boolean
   getOptimizedDepId: (depInfo: OptimizedDepInfo) => string
   delayDepsOptimizerUntil: (id: string, done: () => Promise<any>) => void
-  registerWorkersSource: (id: string) => void
-  resetRegisteredIds: () => void
-  ensureFirstRun: () => void
 
   close: () => Promise<void>
 
@@ -119,10 +114,12 @@ export interface DepOptimizationConfig {
    */
   extensions?: string[]
   /**
-   * Disables dependencies optimizations, true disables the optimizer during
-   * build and dev. Pass 'build' or 'dev' to only disable the optimizer in
-   * one of the modes. Deps optimization is enabled by default in dev only.
+   * Deps optimization during build was removed in Vite 5.1. This option is
+   * now redundant and will be removed in a future version. Switch to using
+   * `optimizeDeps.noDiscovery` and an empty or undefined `optimizeDeps.include`.
+   * true or 'dev' disables the optimizer, false or 'build' leaves it enabled.
    * @default 'build'
+   * @deprecated
    * @experimental
    */
   disabled?: boolean | 'build' | 'dev'
@@ -225,8 +222,7 @@ export async function optimizeDeps(
   asCommand = false,
 ): Promise<DepOptimizationMetadata> {
   const log = asCommand ? config.logger.info : debug
-
-  const ssr = config.command === 'build' && !!config.build.ssr
+  const ssr = false
 
   const cachedMetadata = await loadCachedDepOptimizationMetadata(
     config,
@@ -247,7 +243,7 @@ export async function optimizeDeps(
 
   const depsInfo = toDiscoveredDependencies(config, deps, ssr)
 
-  const result = await runOptimizeDeps(config, depsInfo).result
+  const result = await runOptimizeDeps(config, depsInfo, ssr).result
 
   await result.commit()
 
@@ -268,37 +264,13 @@ export async function optimizeServerSsrDeps(
     return cachedMetadata
   }
 
-  let alsoInclude: string[] | undefined
-  let noExternalFilter: ((id: unknown) => boolean) | undefined
-
-  const { exclude } = getDepOptimizationConfig(config, ssr)
-
-  const noExternal = config.ssr?.noExternal
-  if (noExternal) {
-    alsoInclude = arraify(noExternal).filter(
-      (ne) => typeof ne === 'string',
-    ) as string[]
-    noExternalFilter =
-      noExternal === true
-        ? (dep: unknown) => true
-        : createFilter(undefined, exclude, {
-            resolve: false,
-          })
-  }
-
   const deps: Record<string, string> = {}
 
-  await addManuallyIncludedOptimizeDeps(
-    deps,
-    config,
-    ssr,
-    alsoInclude,
-    noExternalFilter,
-  )
+  await addManuallyIncludedOptimizeDeps(deps, config, ssr)
 
-  const depsInfo = toDiscoveredDependencies(config, deps, true)
+  const depsInfo = toDiscoveredDependencies(config, deps, ssr)
 
-  const result = await runOptimizeDeps(config, depsInfo, true).result
+  const result = await runOptimizeDeps(config, depsInfo, ssr).result
 
   await result.commit()
 
@@ -446,8 +418,7 @@ export function depsLogString(qualifiedIds: string[]): string {
 export function runOptimizeDeps(
   resolvedConfig: ResolvedConfig,
   depsInfo: Record<string, OptimizedDepInfo>,
-  ssr: boolean = resolvedConfig.command === 'build' &&
-    !!resolvedConfig.build.ssr,
+  ssr: boolean,
 ): {
   cancel: () => Promise<void>
   result: Promise<DepOptimizationResult>
@@ -708,7 +679,6 @@ async function prepareEsbuildOptimizerRun(
   context?: BuildContext
   idToExports: Record<string, ExportsData>
 }> {
-  const isBuild = resolvedConfig.command === 'build'
   const config: ResolvedConfig = {
     ...resolvedConfig,
     command: 'build',
@@ -749,40 +719,15 @@ async function prepareEsbuildOptimizerRun(
 
   if (optimizerContext.cancelled) return { context: undefined, idToExports }
 
-  // esbuild automatically replaces process.env.NODE_ENV for platform 'browser'
-  // But in lib mode, we need to keep process.env.NODE_ENV untouched
   const define = {
-    'process.env.NODE_ENV':
-      isBuild && config.build.lib
-        ? 'process.env.NODE_ENV'
-        : JSON.stringify(process.env.NODE_ENV || config.mode),
+    'process.env.NODE_ENV': JSON.stringify(process.env.NODE_ENV || config.mode),
   }
 
   const platform =
     ssr && config.ssr?.target !== 'webworker' ? 'node' : 'browser'
 
   const external = [...(optimizeDeps?.exclude ?? [])]
 
-  if (isBuild) {
-    let rollupOptionsExternal = config?.build?.rollupOptions?.external
-    if (rollupOptionsExternal) {
-      if (typeof rollupOptionsExternal === 'string') {
-        rollupOptionsExternal = [rollupOptionsExternal]
-      }
-      // TODO: decide whether to support RegExp and function options
-      // They're not supported yet because `optimizeDeps.exclude` currently only accepts strings
-      if (
-        !Array.isArray(rollupOptionsExternal) ||
-        rollupOptionsExternal.some((ext) => typeof ext !== 'string')
-      ) {
-        throw new Error(
-          `[vite] 'build.rollupOptions.external' can only be an array of strings or a string when using esbuild optimization at build time.`,
-        )
-      }
-      external.push(...(rollupOptionsExternal as string[]))
-    }
-  }
-
   const plugins = [...pluginsFromConfig]
   if (external.length) {
     plugins.push(esbuildCjsExternalPlugin(external, platform))
@@ -806,13 +751,13 @@ async function prepareEsbuildOptimizerRun(
             js: `import { createRequire } from 'module';const require = createRequire(import.meta.url);`,
           }
         : undefined,
-    target: isBuild ? config.build.target || undefined : ESBUILD_MODULES_TARGET,
+    target: ESBUILD_MODULES_TARGET,
     external,
     logLevel: 'error',
     splitting: true,
     sourcemap: true,
     outdir: processingCacheDir,
-    ignoreAnnotations: !isBuild,
+    ignoreAnnotations: true,
     metafile: true,
     plugins,
     charset: 'utf8',
@@ -830,13 +775,12 @@ export async function addManuallyIncludedOptimizeDeps(
   deps: Record<string, string>,
   config: ResolvedConfig,
   ssr: boolean,
-  extra: string[] = [],
   filter?: (id: string) => boolean,
 ): Promise<void> {
   const { logger } = config
   const optimizeDeps = getDepOptimizationConfig(config, ssr)
   const optimizeDepsInclude = optimizeDeps?.include ?? []
-  if (optimizeDepsInclude.length || extra.length) {
+  if (optimizeDepsInclude.length) {
     const unableToOptimize = (id: string, msg: string) => {
       if (optimizeDepsInclude.includes(id)) {
         logger.warn(
@@ -847,7 +791,7 @@ export async function addManuallyIncludedOptimizeDeps(
       }
     }
 
-    const includes = [...optimizeDepsInclude, ...extra]
+    const includes = [...optimizeDepsInclude]
     for (let i = 0; i < includes.length; i++) {
       const id = includes[i]
       if (glob.isDynamicPattern(id)) {
@@ -862,7 +806,7 @@ export async function addManuallyIncludedOptimizeDeps(
       // normalize 'foo   >bar` as 'foo > bar' to prevent same id being added
       // and for pretty printing
       const normalizedId = normalizeId(id)
-      if (!deps[normalizedId] && filter?.(normalizedId) !== false) {
+      if (!deps[normalizedId]) {
         const entry = await resolve(id)
         if (entry) {
           if (isOptimizable(entry, optimizeDeps)) {
@@ -901,30 +845,17 @@ export function getOptimizedDepPath(
   )
 }
 
-function getDepsCacheSuffix(config: ResolvedConfig, ssr: boolean): string {
-  let suffix = ''
-  if (config.command === 'build') {
-    // Differentiate build caches depending on outDir to allow parallel builds
-    const { outDir } = config.build
-    const buildId =
-      outDir.length > 8 || outDir.includes('/') ? getHash(outDir) : outDir
-    suffix += `_build-${buildId}`
-  }
-  if (ssr) {
-    suffix += '_ssr'
-  }
-  return suffix
+function getDepsCacheSuffix(ssr: boolean): string {
+  return ssr ? '_ssr' : ''
 }
 
 export function getDepsCacheDir(config: ResolvedConfig, ssr: boolean): string {
-  return getDepsCacheDirPrefix(config) + getDepsCacheSuffix(config, ssr)
+  return getDepsCacheDirPrefix(config) + getDepsCacheSuffix(ssr)
 }
 
 function getProcessingDepsCacheDir(config: ResolvedConfig, ssr: boolean) {
   return (
-    getDepsCacheDirPrefix(config) +
-    getDepsCacheSuffix(config, ssr) +
-    getTempSuffix()
+    getDepsCacheDirPrefix(config) + getDepsCacheSuffix(ssr) + getTempSuffix()
   )
 }
 
@@ -1212,7 +1143,6 @@ export function getDepHash(config: ResolvedConfig, ssr: boolean): string {
       mode: process.env.NODE_ENV || config.mode,
       root: config.root,
       resolve: config.resolve,
-      buildTarget: config.build.target,
       assetsInclude: config.assetsInclude,
       plugins: config.plugins.map((p) => p.name),
       optimizeDeps: {