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webpack-config.ts
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webpack-config.ts
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import React from 'react'
import ReactRefreshWebpackPlugin from 'next/dist/compiled/@next/react-refresh-utils/dist/ReactRefreshWebpackPlugin'
import chalk from 'next/dist/compiled/chalk'
import crypto from 'crypto'
import { webpack } from 'next/dist/compiled/webpack/webpack'
import path from 'path'
import semver from 'next/dist/compiled/semver'
import { escapeStringRegexp } from '../shared/lib/escape-regexp'
import {
DOT_NEXT_ALIAS,
PAGES_DIR_ALIAS,
ROOT_DIR_ALIAS,
APP_DIR_ALIAS,
WEBPACK_LAYERS,
RSC_ACTION_PROXY_ALIAS,
RSC_ACTION_CLIENT_WRAPPER_ALIAS,
RSC_ACTION_VALIDATE_ALIAS,
WEBPACK_RESOURCE_QUERIES,
WebpackLayerName,
} from '../lib/constants'
import {
isWebpackAppLayer,
isWebpackDefaultLayer,
isWebpackServerLayer,
} from './utils'
import { CustomRoutes } from '../lib/load-custom-routes.js'
import { isEdgeRuntime } from '../lib/is-edge-runtime'
import {
CLIENT_STATIC_FILES_RUNTIME_AMP,
CLIENT_STATIC_FILES_RUNTIME_MAIN,
CLIENT_STATIC_FILES_RUNTIME_MAIN_APP,
CLIENT_STATIC_FILES_RUNTIME_POLYFILLS_SYMBOL,
CLIENT_STATIC_FILES_RUNTIME_REACT_REFRESH,
CLIENT_STATIC_FILES_RUNTIME_WEBPACK,
MIDDLEWARE_REACT_LOADABLE_MANIFEST,
REACT_LOADABLE_MANIFEST,
SERVER_DIRECTORY,
COMPILER_NAMES,
CompilerNameValues,
} from '../shared/lib/constants'
import { execOnce } from '../shared/lib/utils'
import { NextConfigComplete } from '../server/config-shared'
import { finalizeEntrypoint } from './entries'
import * as Log from './output/log'
import { buildConfiguration } from './webpack/config'
import MiddlewarePlugin, {
getEdgePolyfilledModules,
handleWebpackExternalForEdgeRuntime,
} from './webpack/plugins/middleware-plugin'
import BuildManifestPlugin from './webpack/plugins/build-manifest-plugin'
import { JsConfigPathsPlugin } from './webpack/plugins/jsconfig-paths-plugin'
import { DropClientPage } from './webpack/plugins/next-drop-client-page-plugin'
import PagesManifestPlugin from './webpack/plugins/pages-manifest-plugin'
import { ProfilingPlugin } from './webpack/plugins/profiling-plugin'
import { ReactLoadablePlugin } from './webpack/plugins/react-loadable-plugin'
import { WellKnownErrorsPlugin } from './webpack/plugins/wellknown-errors-plugin'
import { regexLikeCss } from './webpack/config/blocks/css'
import { CopyFilePlugin } from './webpack/plugins/copy-file-plugin'
import { ClientReferenceManifestPlugin } from './webpack/plugins/flight-manifest-plugin'
import { FlightClientEntryPlugin } from './webpack/plugins/flight-client-entry-plugin'
import { NextTypesPlugin } from './webpack/plugins/next-types-plugin'
import type {
Feature,
SWC_TARGET_TRIPLE,
} from './webpack/plugins/telemetry-plugin'
import type { Span } from '../trace'
import type { MiddlewareMatcher } from './analysis/get-page-static-info'
import loadJsConfig from './load-jsconfig'
import { loadBindings } from './swc'
import { AppBuildManifestPlugin } from './webpack/plugins/app-build-manifest-plugin'
import { SubresourceIntegrityPlugin } from './webpack/plugins/subresource-integrity-plugin'
import { NextFontManifestPlugin } from './webpack/plugins/next-font-manifest-plugin'
import { getSupportedBrowsers } from './utils'
import { MemoryWithGcCachePlugin } from './webpack/plugins/memory-with-gc-cache-plugin'
import { getBabelConfigFile } from './get-babel-config-file'
import { defaultOverrides } from '../server/require-hook'
import { needsExperimentalReact } from '../lib/needs-experimental-react'
type ExcludesFalse = <T>(x: T | false) => x is T
type ClientEntries = {
[key: string]: string | string[]
}
const EXTERNAL_PACKAGES =
require('../lib/server-external-packages.json') as string[]
const NEXT_PROJECT_ROOT = path.join(__dirname, '..', '..')
const NEXT_PROJECT_ROOT_DIST = path.join(NEXT_PROJECT_ROOT, 'dist')
const NEXT_PROJECT_ROOT_DIST_CLIENT = path.join(
NEXT_PROJECT_ROOT_DIST,
'client'
)
if (parseInt(React.version) < 18) {
throw new Error('Next.js requires react >= 18.2.0 to be installed.')
}
const babelIncludeRegexes: RegExp[] = [
/next[\\/]dist[\\/](esm[\\/])?shared[\\/]lib/,
/next[\\/]dist[\\/](esm[\\/])?client/,
/next[\\/]dist[\\/](esm[\\/])?pages/,
/[\\/](strip-ansi|ansi-regex|styled-jsx)[\\/]/,
]
const reactPackagesRegex = /^(react|react-dom|react-server-dom-webpack)($|\/)/
const asyncStoragesRegex =
/next[\\/]dist[\\/](esm[\\/])?client[\\/]components[\\/](static-generation-async-storage|action-async-storage|request-async-storage)/
const pathSeparators = '[/\\\\]'
const optionalEsmPart = `((${pathSeparators}esm)?${pathSeparators})`
const externalFileEnd = '(\\.external(\\.js)?)$'
const nextDist = `next${pathSeparators}dist`
const externalPattern = new RegExp(
`${nextDist}${optionalEsmPart}.*${externalFileEnd}`
)
// exports.<conditionName>
const edgeConditionNames = [
'edge-light',
'worker',
// inherits the default conditions
'...',
]
// packageJson.<mainField>
const mainFieldsPerCompiler: Record<CompilerNameValues, string[]> = {
[COMPILER_NAMES.server]: ['main', 'module'],
[COMPILER_NAMES.client]: ['browser', 'module', 'main'],
[COMPILER_NAMES.edgeServer]: edgeConditionNames,
}
// Support for NODE_PATH
const nodePathList = (process.env.NODE_PATH || '')
.split(process.platform === 'win32' ? ';' : ':')
.filter((p) => !!p)
const watchOptions = Object.freeze({
aggregateTimeout: 5,
ignored:
// Matches **/node_modules/**, **/.git/** and **/.next/**
/^((?:[^/]*(?:\/|$))*)(\.(git|next)|node_modules)(\/((?:[^/]*(?:\/|$))*)(?:$|\/))?/,
})
function isModuleCSS(module: { type: string }) {
return (
// mini-css-extract-plugin
module.type === `css/mini-extract` ||
// extract-css-chunks-webpack-plugin (old)
module.type === `css/extract-chunks` ||
// extract-css-chunks-webpack-plugin (new)
module.type === `css/extract-css-chunks`
)
}
function errorIfEnvConflicted(config: NextConfigComplete, key: string) {
const isPrivateKey = /^(?:NODE_.+)|^(?:__.+)$/i.test(key)
const hasNextRuntimeKey = key === 'NEXT_RUNTIME'
if (isPrivateKey || hasNextRuntimeKey) {
throw new Error(
`The key "${key}" under "env" in ${config.configFileName} is not allowed. https://nextjs.org/docs/messages/env-key-not-allowed`
)
}
}
function isResourceInPackages(
resource: string,
packageNames?: string[],
packageDirMapping?: Map<string, string>
) {
return packageNames?.some((p: string) =>
packageDirMapping && packageDirMapping.has(p)
? resource.startsWith(packageDirMapping.get(p)! + path.sep)
: resource.includes(
path.sep +
path.join('node_modules', p.replace(/\//g, path.sep)) +
path.sep
)
)
}
export function getDefineEnv({
allowedRevalidateHeaderKeys,
clientRouterFilters,
config,
dev,
distDir,
fetchCacheKeyPrefix,
hasRewrites,
isClient,
isEdgeServer,
isNodeOrEdgeCompilation,
isNodeServer,
middlewareMatchers,
previewModeId,
}: {
allowedRevalidateHeaderKeys: string[] | undefined
clientRouterFilters: Parameters<
typeof getBaseWebpackConfig
>[1]['clientRouterFilters']
config: NextConfigComplete
dev: boolean
distDir: string
fetchCacheKeyPrefix: string | undefined
hasRewrites: boolean
isClient: boolean
isEdgeServer: boolean
isNodeOrEdgeCompilation: boolean
isNodeServer: boolean
middlewareMatchers: MiddlewareMatcher[] | undefined
previewModeId: string | undefined
}) {
return {
// internal field to identify the plugin config
__NEXT_DEFINE_ENV: 'true',
...Object.keys(process.env).reduce(
(prev: { [key: string]: string }, key: string) => {
if (key.startsWith('NEXT_PUBLIC_')) {
prev[`process.env.${key}`] = JSON.stringify(process.env[key]!)
}
return prev
},
{}
),
...Object.keys(config.env).reduce((acc, key) => {
errorIfEnvConflicted(config, key)
return {
...acc,
[`process.env.${key}`]: JSON.stringify(config.env[key]),
}
}, {}),
...(!isEdgeServer
? {}
: {
EdgeRuntime: JSON.stringify(
/**
* Cloud providers can set this environment variable to allow users
* and library authors to have different implementations based on
* the runtime they are running with, if it's not using `edge-runtime`
*/
process.env.NEXT_EDGE_RUNTIME_PROVIDER || 'edge-runtime'
),
}),
'process.turbopack': JSON.stringify(false),
// TODO: enforce `NODE_ENV` on `process.env`, and add a test:
'process.env.NODE_ENV': JSON.stringify(dev ? 'development' : 'production'),
'process.env.NEXT_RUNTIME': JSON.stringify(
isEdgeServer ? 'edge' : isNodeServer ? 'nodejs' : undefined
),
'process.env.NEXT_MINIMAL': JSON.stringify(''),
'process.env.__NEXT_ACTIONS_DEPLOYMENT_ID': JSON.stringify(
config.experimental.useDeploymentIdServerActions
),
'process.env.NEXT_DEPLOYMENT_ID': JSON.stringify(
config.experimental.deploymentId
),
'process.env.__NEXT_FETCH_CACHE_KEY_PREFIX':
JSON.stringify(fetchCacheKeyPrefix),
'process.env.__NEXT_PREVIEW_MODE_ID': JSON.stringify(previewModeId),
'process.env.__NEXT_ALLOWED_REVALIDATE_HEADERS': JSON.stringify(
allowedRevalidateHeaderKeys
),
'process.env.__NEXT_MIDDLEWARE_MATCHERS': JSON.stringify(
middlewareMatchers || []
),
'process.env.__NEXT_MANUAL_CLIENT_BASE_PATH': JSON.stringify(
config.experimental.manualClientBasePath
),
'process.env.__NEXT_CLIENT_ROUTER_FILTER_ENABLED': JSON.stringify(
config.experimental.clientRouterFilter
),
'process.env.__NEXT_CLIENT_ROUTER_S_FILTER': JSON.stringify(
clientRouterFilters?.staticFilter
),
'process.env.__NEXT_CLIENT_ROUTER_D_FILTER': JSON.stringify(
clientRouterFilters?.dynamicFilter
),
'process.env.__NEXT_OPTIMISTIC_CLIENT_CACHE': JSON.stringify(
config.experimental.optimisticClientCache
),
'process.env.__NEXT_MIDDLEWARE_PREFETCH': JSON.stringify(
config.experimental.middlewarePrefetch
),
'process.env.__NEXT_CROSS_ORIGIN': JSON.stringify(config.crossOrigin),
'process.browser': JSON.stringify(isClient),
'process.env.__NEXT_TEST_MODE': JSON.stringify(
process.env.__NEXT_TEST_MODE
),
// This is used in client/dev-error-overlay/hot-dev-client.js to replace the dist directory
...(dev && (isClient || isEdgeServer)
? {
'process.env.__NEXT_DIST_DIR': JSON.stringify(distDir),
}
: {}),
'process.env.__NEXT_TRAILING_SLASH': JSON.stringify(config.trailingSlash),
'process.env.__NEXT_BUILD_INDICATOR': JSON.stringify(
config.devIndicators.buildActivity
),
'process.env.__NEXT_BUILD_INDICATOR_POSITION': JSON.stringify(
config.devIndicators.buildActivityPosition
),
'process.env.__NEXT_STRICT_MODE': JSON.stringify(
config.reactStrictMode === null ? false : config.reactStrictMode
),
'process.env.__NEXT_STRICT_MODE_APP': JSON.stringify(
// When next.config.js does not have reactStrictMode it's enabled by default.
config.reactStrictMode === null ? true : config.reactStrictMode
),
'process.env.__NEXT_OPTIMIZE_FONTS': JSON.stringify(
!dev && config.optimizeFonts
),
'process.env.__NEXT_OPTIMIZE_CSS': JSON.stringify(
config.experimental.optimizeCss && !dev
),
'process.env.__NEXT_SCRIPT_WORKERS': JSON.stringify(
config.experimental.nextScriptWorkers && !dev
),
'process.env.__NEXT_SCROLL_RESTORATION': JSON.stringify(
config.experimental.scrollRestoration
),
'process.env.__NEXT_IMAGE_OPTS': JSON.stringify({
deviceSizes: config.images.deviceSizes,
imageSizes: config.images.imageSizes,
path: config.images.path,
loader: config.images.loader,
dangerouslyAllowSVG: config.images.dangerouslyAllowSVG,
unoptimized: config?.images?.unoptimized,
...(dev
? {
// pass domains in development to allow validating on the client
domains: config.images.domains,
remotePatterns: config.images?.remotePatterns,
output: config.output,
}
: {}),
}),
'process.env.__NEXT_ROUTER_BASEPATH': JSON.stringify(config.basePath),
'process.env.__NEXT_STRICT_NEXT_HEAD': JSON.stringify(
config.experimental.strictNextHead
),
'process.env.__NEXT_HAS_REWRITES': JSON.stringify(hasRewrites),
'process.env.__NEXT_CONFIG_OUTPUT': JSON.stringify(config.output),
'process.env.__NEXT_I18N_SUPPORT': JSON.stringify(!!config.i18n),
'process.env.__NEXT_I18N_DOMAINS': JSON.stringify(config.i18n?.domains),
'process.env.__NEXT_ANALYTICS_ID': JSON.stringify(config.analyticsId),
'process.env.__NEXT_NO_MIDDLEWARE_URL_NORMALIZE': JSON.stringify(
config.skipMiddlewareUrlNormalize
),
'process.env.__NEXT_EXTERNAL_MIDDLEWARE_REWRITE_RESOLVE': JSON.stringify(
config.experimental.externalMiddlewareRewritesResolve
),
'process.env.__NEXT_MANUAL_TRAILING_SLASH': JSON.stringify(
config.skipTrailingSlashRedirect
),
'process.env.__NEXT_HAS_WEB_VITALS_ATTRIBUTION': JSON.stringify(
config.experimental.webVitalsAttribution &&
config.experimental.webVitalsAttribution.length > 0
),
'process.env.__NEXT_WEB_VITALS_ATTRIBUTION': JSON.stringify(
config.experimental.webVitalsAttribution
),
'process.env.__NEXT_ASSET_PREFIX': JSON.stringify(config.assetPrefix),
...(isNodeOrEdgeCompilation
? {
// Fix bad-actors in the npm ecosystem (e.g. `node-formidable`)
// This is typically found in unmaintained modules from the
// pre-webpack era (common in server-side code)
'global.GENTLY': JSON.stringify(false),
}
: undefined),
'process.env.TURBOPACK': JSON.stringify(false),
...(isNodeServer
? {
'process.env.__NEXT_EXPERIMENTAL_REACT': JSON.stringify(
needsExperimentalReact(config)
),
}
: undefined),
}
}
function getReactProfilingInProduction() {
return {
'react-dom$': 'react-dom/profiling',
'scheduler/tracing': 'scheduler/tracing-profiling',
}
}
function createRSCAliases(
bundledReactChannel: string,
opts: {
layer: WebpackLayerName & ('rsc' | 'ssr' | 'app-pages-browser')
isEdgeServer: boolean
reactProductionProfiling: boolean
reactServerCondition?: boolean
}
) {
let alias: Record<string, string> = {
react$: `next/dist/compiled/react${bundledReactChannel}`,
'react-dom$': `next/dist/compiled/react-dom${bundledReactChannel}`,
'react/jsx-runtime$': `next/dist/compiled/react${bundledReactChannel}/jsx-runtime`,
'react/jsx-dev-runtime$': `next/dist/compiled/react${bundledReactChannel}/jsx-dev-runtime`,
'react-dom/client$': `next/dist/compiled/react-dom${bundledReactChannel}/client`,
'react-dom/server$': `next/dist/compiled/react-dom${bundledReactChannel}/server`,
'react-dom/server.edge$': `next/dist/compiled/react-dom${bundledReactChannel}/server.edge`,
'react-dom/server.browser$': `next/dist/compiled/react-dom${bundledReactChannel}/server.browser`,
'react-server-dom-webpack/client$': `next/dist/compiled/react-server-dom-webpack${bundledReactChannel}/client`,
'react-server-dom-webpack/client.edge$': `next/dist/compiled/react-server-dom-webpack${bundledReactChannel}/client.edge`,
'react-server-dom-webpack/server.edge$': `next/dist/compiled/react-server-dom-webpack${bundledReactChannel}/server.edge`,
'react-server-dom-webpack/server.node$': `next/dist/compiled/react-server-dom-webpack${bundledReactChannel}/server.node`,
}
if (!opts.isEdgeServer) {
if (opts.layer === WEBPACK_LAYERS.serverSideRendering) {
alias = Object.assign(alias, {
'react/jsx-runtime$': `next/dist/server/future/route-modules/app-page/vendored/shared/react-jsx-runtime`,
'react/jsx-dev-runtime$': `next/dist/server/future/route-modules/app-page/vendored/shared/react-jsx-dev-runtime`,
react$: `next/dist/server/future/route-modules/app-page/vendored/${opts.layer}/react`,
'react-dom$': `next/dist/server/future/route-modules/app-page/vendored/${opts.layer}/react-dom`,
'react-dom/server.edge$': `next/dist/server/future/route-modules/app-page/vendored/${opts.layer}/react-dom-server-edge`,
'react-server-dom-webpack/client.edge$': `next/dist/server/future/route-modules/app-page/vendored/${opts.layer}/react-server-dom-webpack-client-edge`,
})
} else if (opts.layer === WEBPACK_LAYERS.reactServerComponents) {
alias = Object.assign(alias, {
'react/jsx-runtime$': `next/dist/server/future/route-modules/app-page/vendored/shared/react-jsx-runtime`,
'react/jsx-dev-runtime$': `next/dist/server/future/route-modules/app-page/vendored/shared/react-jsx-dev-runtime`,
react$: `next/dist/server/future/route-modules/app-page/vendored/${opts.layer}/react`,
'react-dom$': `next/dist/server/future/route-modules/app-page/vendored/${opts.layer}/react-dom`,
'react-server-dom-webpack/server.edge$': `next/dist/server/future/route-modules/app-page/vendored/${opts.layer}/react-server-dom-webpack-server-edge`,
'react-server-dom-webpack/server.node$': `next/dist/server/future/route-modules/app-page/vendored/${opts.layer}/react-server-dom-webpack-server-node`,
})
}
}
if (opts.isEdgeServer) {
if (opts.layer === WEBPACK_LAYERS.reactServerComponents) {
alias[
'react$'
] = `next/dist/compiled/react${bundledReactChannel}/react.shared-subset`
}
// Use server rendering stub for RSC and SSR
// x-ref: https://github.com/facebook/react/pull/25436
alias[
'react-dom$'
] = `next/dist/compiled/react-dom${bundledReactChannel}/server-rendering-stub`
}
if (opts.reactProductionProfiling) {
alias[
'react-dom$'
] = `next/dist/compiled/react-dom${bundledReactChannel}/profiling`
alias[
'scheduler/tracing'
] = `next/dist/compiled/scheduler${bundledReactChannel}/tracing-profiling`
}
alias[
'@vercel/turbopack-ecmascript-runtime/dev/client/hmr-client.ts'
] = `next/dist/client/dev/noop-turbopack-hmr`
return alias
}
const devtoolRevertWarning = execOnce(
(devtool: webpack.Configuration['devtool']) => {
console.warn(
chalk.yellow.bold('Warning: ') +
chalk.bold(`Reverting webpack devtool to '${devtool}'.\n`) +
'Changing the webpack devtool in development mode will cause severe performance regressions.\n' +
'Read more: https://nextjs.org/docs/messages/improper-devtool'
)
}
)
let loggedSwcDisabled = false
let loggedIgnoredCompilerOptions = false
function getOptimizedAliases(): { [pkg: string]: string } {
const stubWindowFetch = path.join(__dirname, 'polyfills', 'fetch', 'index.js')
const stubObjectAssign = path.join(__dirname, 'polyfills', 'object-assign.js')
const shimAssign = path.join(__dirname, 'polyfills', 'object.assign')
return Object.assign(
{},
{
unfetch$: stubWindowFetch,
'isomorphic-unfetch$': stubWindowFetch,
'whatwg-fetch$': path.join(
__dirname,
'polyfills',
'fetch',
'whatwg-fetch.js'
),
},
{
'object-assign$': stubObjectAssign,
// Stub Package: object.assign
'object.assign/auto': path.join(shimAssign, 'auto.js'),
'object.assign/implementation': path.join(
shimAssign,
'implementation.js'
),
'object.assign$': path.join(shimAssign, 'index.js'),
'object.assign/polyfill': path.join(shimAssign, 'polyfill.js'),
'object.assign/shim': path.join(shimAssign, 'shim.js'),
// Replace: full URL polyfill with platform-based polyfill
url: require.resolve('next/dist/compiled/native-url'),
}
)
}
// Alias these modules to be resolved with "module" if possible.
function getBarrelOptimizationAliases(packages: string[]) {
const aliases: { [pkg: string]: string } = {}
const mainFields = ['module', 'main']
for (const pkg of packages) {
try {
const descriptionFileData = require(`${pkg}/package.json`)
const descriptionFilePath = require.resolve(`${pkg}/package.json`)
for (const field of mainFields) {
if (descriptionFileData.hasOwnProperty(field)) {
aliases[pkg + '$'] = path.join(
path.dirname(descriptionFilePath),
descriptionFileData[field]
)
break
}
}
} catch {}
}
return aliases
}
export function attachReactRefresh(
webpackConfig: webpack.Configuration,
targetLoader: webpack.RuleSetUseItem
) {
let injections = 0
const reactRefreshLoaderName =
'next/dist/compiled/@next/react-refresh-utils/dist/loader'
const reactRefreshLoader = require.resolve(reactRefreshLoaderName)
webpackConfig.module?.rules?.forEach((rule) => {
if (rule && typeof rule === 'object' && 'use' in rule) {
const curr = rule.use
// When the user has configured `defaultLoaders.babel` for a input file:
if (curr === targetLoader) {
++injections
rule.use = [reactRefreshLoader, curr as webpack.RuleSetUseItem]
} else if (
Array.isArray(curr) &&
curr.some((r) => r === targetLoader) &&
// Check if loader already exists:
!curr.some(
(r) => r === reactRefreshLoader || r === reactRefreshLoaderName
)
) {
++injections
const idx = curr.findIndex((r) => r === targetLoader)
// Clone to not mutate user input
rule.use = [...curr]
// inject / input: [other, babel] output: [other, refresh, babel]:
rule.use.splice(idx, 0, reactRefreshLoader)
}
}
})
if (injections) {
Log.info(
`automatically enabled Fast Refresh for ${injections} custom loader${
injections > 1 ? 's' : ''
}`
)
}
}
export const NODE_RESOLVE_OPTIONS = {
dependencyType: 'commonjs',
modules: ['node_modules'],
fallback: false,
exportsFields: ['exports'],
importsFields: ['imports'],
conditionNames: ['node', 'require'],
descriptionFiles: ['package.json'],
extensions: ['.js', '.json', '.node'],
enforceExtensions: false,
symlinks: true,
mainFields: ['main'],
mainFiles: ['index'],
roots: [],
fullySpecified: false,
preferRelative: false,
preferAbsolute: false,
restrictions: [],
}
export const NODE_BASE_RESOLVE_OPTIONS = {
...NODE_RESOLVE_OPTIONS,
alias: false,
}
export const NODE_ESM_RESOLVE_OPTIONS = {
...NODE_RESOLVE_OPTIONS,
alias: false,
dependencyType: 'esm',
conditionNames: ['node', 'import'],
fullySpecified: true,
}
export const NODE_BASE_ESM_RESOLVE_OPTIONS = {
...NODE_ESM_RESOLVE_OPTIONS,
alias: false,
}
export const nextImageLoaderRegex =
/\.(png|jpg|jpeg|gif|webp|avif|ico|bmp|svg)$/i
export async function resolveExternal(
dir: string,
esmExternalsConfig: NextConfigComplete['experimental']['esmExternals'],
context: string,
request: string,
isEsmRequested: boolean,
hasAppDir: boolean,
getResolve: (
options: any
) => (
resolveContext: string,
resolveRequest: string
) => Promise<[string | null, boolean]>,
isLocalCallback?: (res: string) => any,
baseResolveCheck = true,
esmResolveOptions: any = NODE_ESM_RESOLVE_OPTIONS,
nodeResolveOptions: any = NODE_RESOLVE_OPTIONS,
baseEsmResolveOptions: any = NODE_BASE_ESM_RESOLVE_OPTIONS,
baseResolveOptions: any = NODE_BASE_RESOLVE_OPTIONS
) {
const esmExternals = !!esmExternalsConfig
const looseEsmExternals = esmExternalsConfig === 'loose'
let res: string | null = null
let isEsm: boolean = false
let preferEsmOptions =
esmExternals && isEsmRequested ? [true, false] : [false]
// Disable esm resolving for app/ and pages/ so for esm package using under pages/
// won't load react through esm loader
if (hasAppDir) {
preferEsmOptions = [false]
}
for (const preferEsm of preferEsmOptions) {
const resolve = getResolve(
preferEsm ? esmResolveOptions : nodeResolveOptions
)
// Resolve the import with the webpack provided context, this
// ensures we're resolving the correct version when multiple
// exist.
try {
;[res, isEsm] = await resolve(context, request)
} catch (err) {
res = null
}
if (!res) {
continue
}
// ESM externals can only be imported (and not required).
// Make an exception in loose mode.
if (!isEsmRequested && isEsm && !looseEsmExternals) {
continue
}
if (isLocalCallback) {
return { localRes: isLocalCallback(res) }
}
// Bundled Node.js code is relocated without its node_modules tree.
// This means we need to make sure its request resolves to the same
// package that'll be available at runtime. If it's not identical,
// we need to bundle the code (even if it _should_ be external).
if (baseResolveCheck) {
let baseRes: string | null
let baseIsEsm: boolean
try {
const baseResolve = getResolve(
isEsm ? baseEsmResolveOptions : baseResolveOptions
)
;[baseRes, baseIsEsm] = await baseResolve(dir, request)
} catch (err) {
baseRes = null
baseIsEsm = false
}
// Same as above: if the package, when required from the root,
// would be different from what the real resolution would use, we
// cannot externalize it.
// if request is pointing to a symlink it could point to the the same file,
// the resolver will resolve symlinks so this is handled
if (baseRes !== res || isEsm !== baseIsEsm) {
res = null
continue
}
}
break
}
return { res, isEsm }
}
export async function loadProjectInfo({
dir,
config,
dev,
}: {
dir: string
config: NextConfigComplete
dev: boolean
}) {
const { jsConfig, resolvedBaseUrl } = await loadJsConfig(dir, config)
const supportedBrowsers = await getSupportedBrowsers(dir, dev)
return {
jsConfig,
resolvedBaseUrl,
supportedBrowsers,
}
}
const UNSAFE_CACHE_REGEX = /[\\/]pages[\\/][^\\/]+(?:$|\?|#)/
export default async function getBaseWebpackConfig(
dir: string,
{
buildId,
config,
compilerType,
dev = false,
entrypoints,
isDevFallback = false,
pagesDir,
reactProductionProfiling = false,
rewrites,
originalRewrites,
originalRedirects,
runWebpackSpan,
appDir,
middlewareMatchers,
noMangling = false,
jsConfig,
resolvedBaseUrl,
supportedBrowsers,
clientRouterFilters,
previewModeId,
fetchCacheKeyPrefix,
allowedRevalidateHeaderKeys,
}: {
buildId: string
config: NextConfigComplete
compilerType: CompilerNameValues
dev?: boolean
entrypoints: webpack.EntryObject
isDevFallback?: boolean
pagesDir?: string
reactProductionProfiling?: boolean
rewrites: CustomRoutes['rewrites']
originalRewrites: CustomRoutes['rewrites'] | undefined
originalRedirects: CustomRoutes['redirects'] | undefined
runWebpackSpan: Span
appDir?: string
middlewareMatchers?: MiddlewareMatcher[]
noMangling?: boolean
jsConfig: any
resolvedBaseUrl: string | undefined
supportedBrowsers: string[] | undefined
clientRouterFilters?: {
staticFilter: ReturnType<
import('../shared/lib/bloom-filter').BloomFilter['export']
>
dynamicFilter: ReturnType<
import('../shared/lib/bloom-filter').BloomFilter['export']
>
}
previewModeId?: string
fetchCacheKeyPrefix?: string
allowedRevalidateHeaderKeys?: string[]
}
): Promise<webpack.Configuration> {
const isClient = compilerType === COMPILER_NAMES.client
const isEdgeServer = compilerType === COMPILER_NAMES.edgeServer
const isNodeServer = compilerType === COMPILER_NAMES.server
// If the current compilation is aimed at server-side code instead of client-side code.
const isNodeOrEdgeCompilation = isNodeServer || isEdgeServer
const hasRewrites =
rewrites.beforeFiles.length > 0 ||
rewrites.afterFiles.length > 0 ||
rewrites.fallback.length > 0
const hasAppDir = !!appDir
const hasServerComponents = hasAppDir
const disableOptimizedLoading = true
const enableTypedRoutes = !!config.experimental.typedRoutes && hasAppDir
const useServerActions = !!config.experimental.serverActions && hasAppDir
const bundledReactChannel = needsExperimentalReact(config)
? '-experimental'
: ''
if (isClient) {
if (
// @ts-expect-error: experimental.runtime is deprecated
isEdgeRuntime(config.experimental.runtime)
) {
Log.warn(
'You are using `experimental.runtime` which was removed. Check https://nextjs.org/docs/api-routes/edge-api-routes on how to use edge runtime.'
)
}
}
const babelConfigFile = await getBabelConfigFile(dir)
const distDir = path.join(dir, config.distDir)
let useSWCLoader = !babelConfigFile || config.experimental.forceSwcTransforms
let SWCBinaryTarget: [Feature, boolean] | undefined = undefined
if (useSWCLoader) {
// TODO: we do not collect wasm target yet
const binaryTarget = require('./swc')?.getBinaryMetadata?.()
?.target as SWC_TARGET_TRIPLE
SWCBinaryTarget = binaryTarget
? [`swc/target/${binaryTarget}` as const, true]
: undefined
}
if (!loggedSwcDisabled && !useSWCLoader && babelConfigFile) {
Log.info(
`Disabled SWC as replacement for Babel because of custom Babel configuration "${path.relative(
dir,
babelConfigFile
)}" https://nextjs.org/docs/messages/swc-disabled`
)
loggedSwcDisabled = true
}
// eagerly load swc bindings instead of waiting for transform calls
if (!babelConfigFile && isClient) {
await loadBindings()
}
if (!loggedIgnoredCompilerOptions && !useSWCLoader && config.compiler) {
Log.info(
'`compiler` options in `next.config.js` will be ignored while using Babel https://nextjs.org/docs/messages/ignored-compiler-options'
)
loggedIgnoredCompilerOptions = true
}
const getBabelLoader = () => {
return {
loader: require.resolve('./babel/loader/index'),
options: {
configFile: babelConfigFile,
isServer: isNodeOrEdgeCompilation,
distDir,
pagesDir,
cwd: dir,
development: dev,
hasServerComponents,
hasReactRefresh: dev && isClient,
hasJsxRuntime: true,
},
}
}
let swcTraceProfilingInitialized = false
const getSwcLoader = (extraOptions?: any) => {
if (
config?.experimental?.swcTraceProfiling &&
!swcTraceProfilingInitialized
) {
// This will init subscribers once only in a single process lifecycle,
// even though it can be called multiple times.
// Subscriber need to be initialized _before_ any actual swc's call (transform, etcs)
// to collect correct trace spans when they are called.
swcTraceProfilingInitialized = true
require('./swc')?.initCustomTraceSubscriber?.(
path.join(distDir, `swc-trace-profile-${Date.now()}.json`)
)
}
return {
loader: 'next-swc-loader',
options: {
isServer: isNodeOrEdgeCompilation,
rootDir: dir,
pagesDir,
appDir,
hasReactRefresh: dev && isClient,
hasServerComponents: true,
nextConfig: config,
jsConfig,
supportedBrowsers,
swcCacheDir: path.join(dir, config?.distDir ?? '.next', 'cache', 'swc'),
...extraOptions,
},
}
}
const defaultLoaders = {
babel: useSWCLoader ? getSwcLoader() : getBabelLoader(),
}
const swcLoaderForServerLayer = hasServerComponents
? useSWCLoader
? [getSwcLoader({ isServerLayer: true, bundleTarget: 'server' })]
: // When using Babel, we will have to add the SWC loader
// as an additional pass to handle RSC correctly.
// This will cause some performance overhead but
// acceptable as Babel will not be recommended.
[
getSwcLoader({ isServerLayer: true, bundleTarget: 'server' }),
getBabelLoader(),
]
: []
const swcLoaderForMiddlewareLayer = useSWCLoader
? getSwcLoader({ hasServerComponents: false, bundleTarget: 'default' })
: // When using Babel, we will have to use SWC to do the optimization
// for middleware to tree shake the unused default optimized imports like "next/server".
// This will cause some performance overhead but
// acceptable as Babel will not be recommended.
[
getSwcLoader({ hasServerComponents: false, bundleTarget: 'default' }),
getBabelLoader(),
]
// client components layers: SSR + browser
const swcLoaderForClientLayer = [
...(dev && isClient
? [
require.resolve(
'next/dist/compiled/@next/react-refresh-utils/dist/loader'
),
]
: []),
{
// This loader handles actions and client entries
// in the client layer.
loader: 'next-flight-client-module-loader',
},
...(hasServerComponents
? useSWCLoader
? [
getSwcLoader({
hasServerComponents,
isServerLayer: false,
}),
]
: // When using Babel, we will have to add the SWC loader
// as an additional pass to handle RSC correctly.
// This will cause some performance overhead but
// acceptable as Babel will not be recommended.
[
getSwcLoader({
isServerLayer: false,
}),
getBabelLoader(),
]
: []),
]
// Loader for API routes needs to be differently configured as it shouldn't
// have RSC transpiler enabled, so syntax checks such as invalid imports won't
// be performed.
const loaderForAPIRoutes =
hasServerComponents && useSWCLoader
? {
loader: 'next-swc-loader',
options: {
...getSwcLoader().options,
bundleTarget: 'default',
hasServerComponents: false,
},
}
: defaultLoaders.babel
const pageExtensions = config.pageExtensions
const outputPath = isNodeOrEdgeCompilation
? path.join(distDir, SERVER_DIRECTORY)
: distDir