webpack-config.ts

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 { 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'

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,
  useServerActions,
}: {
  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
  useServerActions: boolean
}) {
  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(useServerActions),
        }
      : 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 === 'ssr') {
      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 === 'rsc') {
      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 === 'rsc') {
      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 = useServerActions ? '-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: 'server' })
    : // 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: 'server' }),
        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: 'server',
            hasServerComponents: false,
          },
        }
      : defaultLoaders.babel

  const pageExtensions = config.pageExtensions

  const outputPath = isNodeOrEdgeCompilation
    ? path.join(distDir, SERVER_DIRECTORY)
    : distDir

  const reactServerCondition = [
    'react-server',
    ...(isEdgeServer ? edgeConditionNames : []),
    // inherits the default conditions
    '...',
  ]

  const clientEntries = isClient
    ? ({
        // Backwards compatibility
        'main.js': [],
        ...(dev
          ? {
              [CLIENT_STATIC_FILES_RUNTIME_REACT_REFRESH]: require.resolve(
                `next/dist/compiled/@next/react-refresh-utils/dist/runtime`
              ),
              [CLIENT_STATIC_FILES_RUNTIME_AMP]:
                `./` +
                path
                  .relative(
                    dir,
                    path.join(NEXT_PROJECT_ROOT_DIST_CLIENT, 'dev', 'amp-dev')
                  )
                  .replace(/\\/g, '/'),
            }
          : {}),
        [CLIENT_STATIC_FILES_RUNTIME_MAIN]:
          `./` +
          path
            .relative(
              dir,
              path.join(
                NEXT_PROJECT_ROOT_DIST_CLIENT,
                dev ? `next-dev.js` : 'next.js'
              )
            )
            .replace(/\\/g, '/'),
        ...(hasAppDir
          ? {
              [CLIENT_STATIC_FILES_RUNTIME_MAIN_APP]: dev
                ? [
                    require.resolve(
                      `next/dist/compiled/@next/react-refresh-utils/dist/runtime`
                    ),
                    `./` +
                      path
                        .relative(
                          dir,
                          path.join(
                            NEXT_PROJECT_ROOT_DIST_CLIENT,
                            'app-next-dev.js'
                          )
                        )
                        .replace(/\\/g, '/'),
                  ]
                : [
                    `./` +
                      path
                        .relative(
                          dir,
                          path.join(
                            NEXT_PROJECT_ROOT_DIST_CLIENT,
                            'app-next.js'
                          )
                        )
                        .replace(/\\/g, '/'),
                  ],
            }
          : {}),
      } as ClientEntries)
    : undefined

  // tell webpack where to look for _app and _document
  // using aliases to allow falling back to the default
  // version when removed or not present
  const clientResolveRewrites = require.resolve(
    '../shared/lib/router/utils/resolve-rewrites'
  )

  const customAppAliases: { [key: string]: string[] } = {}
  const customErrorAlias: { [key: string]: string[] } = {}
  const customDocumentAliases: { [key: string]: string[] } = {}
  const customRootAliases: { [key: string]: string[] } = {}

  if (dev) {
    const nextDistPath = 'next/dist/' + (isEdgeServer ? 'esm/' : '')
    customAppAliases[`${PAGES_DIR_ALIAS}/_app`] = [
      ...(pagesDir
        ? pageExtensions.reduce((prev, ext) => {
            prev.push(path.join(pagesDir, `_app.${ext}`))
            return prev
          }, [] as string[])
        : []),
      `${nextDistPath}pages/_app.js`,
    ]
    customAppAliases[`${PAGES_DIR_ALIAS}/_error`] = [
      ...(pagesDir
        ? pageExtensions.reduce((prev, ext) => {
            prev.push(path.join(pagesDir, `_error.${ext}`))
            return prev
          }, [] as string[])
        : []),
      `${nextDistPath}pages/_error.js`,
    ]
    customDocumentAliases[`${PAGES_DIR_ALIAS}/_document`] = [
      ...(pagesDir
        ? pageExtensions.reduce((prev, ext) => {
            prev.push(path.join(pagesDir, `_document.${ext}`))
            return prev
          }, [] as string[])
        : []),
      `${nextDistPath}pages/_document.js`,
    ]
  }

  let hasExternalOtelApiPackage = false
  try {
    const opentelemetryPackageJson = require('@opentelemetry/api/package.json')
    if (opentelemetryPackageJson.version) {
      // 0.19.0 is the first version of the package that has the `tracer.getSpan` API that we need:
      // https://github.com/vercel/next.js/issues/48118
      if (semver.gte(opentelemetryPackageJson.version, '0.19.0')) {
        hasExternalOtelApiPackage = true
      } else {
        throw new Error(
          `Installed "@opentelemetry/api" with version ${opentelemetryPackageJson.version} is not supported by Next.js. Please upgrade to 0.19.0 or newer version.`
        )
      }
    }
  } catch {}

  const resolveConfig: webpack.Configuration['resolve'] = {
    // Disable .mjs for node_modules bundling
    extensions: isNodeServer
      ? ['.js', '.mjs', '.tsx', '.ts', '.jsx', '.json', '.wasm']
      : ['.mjs', '.js', '.tsx', '.ts', '.jsx', '.json', '.wasm'],
    extensionAlias: config.experimental.extensionAlias,
    modules: [
      'node_modules',
      ...nodePathList, // Support for NODE_PATH environment variable
    ],
    alias: {
      // Alias 3rd party @vercel/og package to vendored og image package to reduce bundle size
      '@vercel/og': 'next/dist/server/web/spec-extension/image-response',

      // Alias next/dist imports to next/dist/esm assets,
      // let this alias hit before `next` alias.
      ...(isEdgeServer
        ? {
            'next/dist/build': 'next/dist/esm/build',
            'next/dist/client': 'next/dist/esm/client',
            'next/dist/shared': 'next/dist/esm/shared',
            'next/dist/pages': 'next/dist/esm/pages',
            'next/dist/lib': 'next/dist/esm/lib',
            'next/dist/server': 'next/dist/esm/server',

            // Alias the usage of next public APIs
            [`${NEXT_PROJECT_ROOT}/server`]:
              'next/dist/esm/server/web/exports/index',
            [`${NEXT_PROJECT_ROOT}/dist/client/link`]:
              'next/dist/esm/client/link',
            [`${NEXT_PROJECT_ROOT}/dist/shared/lib/image-external`]:
              'next/dist/esm/shared/lib/image-external',
            [`${NEXT_PROJECT_ROOT}/dist/client/script`]:
              'next/dist/esm/client/script',
            [`${NEXT_PROJECT_ROOT}/dist/client/router`]:
              'next/dist/esm/client/router',
            [`${NEXT_PROJECT_ROOT}/dist/shared/lib/head`]:
              'next/dist/esm/shared/lib/head',
            [`${NEXT_PROJECT_ROOT}/dist/shared/lib/dynamic`]:
              'next/dist/esm/shared/lib/dynamic',
            [`${NEXT_PROJECT_ROOT}/dist/pages/_document`]:
              'next/dist/esm/pages/_document',
            [`${NEXT_PROJECT_ROOT}/dist/pages/_app`]:
              'next/dist/esm/pages/_app',
            [`${NEXT_PROJECT_ROOT}/dist/client/components/navigation`]:
              'next/dist/esm/client/components/navigation',
            [`${NEXT_PROJECT_ROOT}/dist/client/components/headers`]:
              'next/dist/esm/client/components/headers',
          }
        : undefined),

      // For RSC server bundle
      ...(!hasExternalOtelApiPackage && {
        '@opentelemetry/api': 'next/dist/compiled/@opentelemetry/api',
      }),

      ...(config.images.loaderFile
        ? {
            'next/dist/shared/lib/image-loader': config.images.loaderFile,
            ...(isEdgeServer && {
              'next/dist/esm/shared/lib/image-loader': config.images.loaderFile,
            }),
          }
        : undefined),

      next: NEXT_PROJECT_ROOT,

      'styled-jsx/style$': defaultOverrides['styled-jsx/style'],
      'styled-jsx$': defaultOverrides['styled-jsx'],

      ...customAppAliases,
      ...customErrorAlias,
      ...customDocumentAliases,
      ...customRootAliases,

      ...(pagesDir ? { [PAGES_DIR_ALIAS]: pagesDir } : {}),
      ...(appDir ? { [APP_DIR_ALIAS]: appDir } : {}),
      [ROOT_DIR_ALIAS]: dir,
      [DOT_NEXT_ALIAS]: distDir,
      ...(isClient || isEdgeServer ? getOptimizedAliases() : {}),
      ...(reactProductionProfiling ? getReactProfilingInProduction() : {}),

      // For Node server, we need to re-alias the package imports to prefer to
      // resolve to the ESM export.
      ...(isNodeServer
        ? getBarrelOptimizationAliases(
            config.experimental.optimizePackageImports || []
          )
        : {}),

      [RSC_ACTION_VALIDATE_ALIAS]:
        'next/dist/build/webpack/loaders/next-flight-loader/action-validate',

      [RSC_ACTION_CLIENT_WRAPPER_ALIAS]:
        'next/dist/build/webpack/loaders/next-flight-loader/action-client-wrapper',

      [RSC_ACTION_PROXY_ALIAS]:
        'next/dist/build/webpack/loaders/next-flight-loader/action-proxy',

      ...(isClient || isEdgeServer
        ? {
            [clientResolveRewrites]: hasRewrites
              ? clientResolveRewrites
              : // With webpack 5 an alias can be pointed to false to noop
                false,
          }
        : {}),

      '@swc/helpers/_': path.join(
        path.dirname(require.resolve('@swc/helpers/package.json')),
        '_'
      ),

      setimmediate: 'next/dist/compiled/setimmediate',
    },
    ...(isClient || isEdgeServer
      ? {
          fallback: {
            process: require.resolve('./polyfills/process'),
          },
        }
      : undefined),
    mainFields: mainFieldsPerCompiler[compilerType],
    ...(isEdgeServer && {
      conditionNames: edgeConditionNames,
    }),
    plugins: [],
  }

  const terserOptions: any = {
    parse: {
      ecma: 8,
    },
    compress: {
      ecma: 5,
      warnings: false,
      // The following two options are known to break valid JavaScript code
      comparisons: false,
      inline: 2, // https://github.com/vercel/next.js/issues/7178#issuecomment-493048965
    },
    mangle: {
      safari10: true,
      ...(process.env.__NEXT_MANGLING_DEBUG || noMangling
        ? {
            toplevel: true,
            module: true,
            keep_classnames: true,
            keep_fnames: true,
          }
        : {}),
    },
    output: {
      ecma: 5,
      safari10: true,
      comments: false,
      // Fixes usage of Emoji and certain Regex
      ascii_only: true,
      ...(process.env.__NEXT_MANGLING_DEBUG || noMangling
        ? {
            beautify: true,
          }
        : {}),
    },
  }

  // Packages which will be split into the 'framework' chunk.
  // Only top-level packages are included, e.g. nested copies like
  // 'node_modules/meow/node_modules/object-assign' are not included.
  const topLevelFrameworkPaths: string[] = []
  const visitedFrameworkPackages = new Set<string>()

  // Adds package-paths of dependencies recursively
  const addPackagePath = (packageName: string, relativeToPath: string) => {
    try {
      if (visitedFrameworkPackages.has(packageName)) {
        return
      }
      visitedFrameworkPackages.add(packageName)

      const packageJsonPath = require.resolve(`${packageName}/package.json`, {
        paths: [relativeToPath],
      })

      // Include a trailing slash so that a `.startsWith(packagePath)` check avoids false positives
      // when one package name starts with the full name of a different package.
      // For example:
      //   "node_modules/react-slider".startsWith("node_modules/react")  // true
      //   "node_modules/react-slider".startsWith("node_modules/react/") // false
      const directory = path.join(packageJsonPath, '../')

      // Returning from the function in case the directory has already been added and traversed
      if (topLevelFrameworkPaths.includes(directory)) return
      topLevelFrameworkPaths.push(directory)
      const dependencies = require(packageJsonPath).dependencies || {}
      for (const name of Object.keys(dependencies)) {
        addPackagePath(name, directory)
      }
    } catch (_) {
      // don't error on failing to resolve framework packages
    }
  }

  for (const packageName of [
    'react',
    'react-dom',
    ...(hasAppDir
      ? [
          `next/dist/compiled/react${bundledReactChannel}`,
          `next/dist/compiled/react-dom${bundledReactChannel}`,
        ]
      : []),
  ]) {
    addPackagePath(packageName, dir)
  }

  const crossOrigin = config.crossOrigin
  const looseEsmExternals = config.experimental?.esmExternals === 'loose'

  const optOutBundlingPackages = EXTERNAL_PACKAGES.concat(
    ...(config.experimental.serverComponentsExternalPackages || [])
  )
  const optOutBundlingPackageRegex = new RegExp(
    `[/\\\\]node_modules[/\\\\](${optOutBundlingPackages
      .map((p) => p.replace(/\//g, '[/\\\\]'))
      .join('|')})[/\\\\]`
  )

  let resolvedExternalPackageDirs: Map<string, string>

  async function handleExternals(
    context: string,
    request: string,
    dependencyType: string,
    layer: WebpackLayerName | null,
    getResolve: (
      options: any
    ) => (
      resolveContext: string,
      resolveRequest: string
    ) => Promise<[string | null, boolean]>
  ) {
    // We need to externalize internal requests for files intended to
    // not be bundled.
    const isLocal: boolean =
      request.startsWith('.') ||
      // Always check for unix-style path, as webpack sometimes
      // normalizes as posix.
      path.posix.isAbsolute(request) ||
      // When on Windows, we also want to check for Windows-specific
      // absolute paths.
      (process.platform === 'win32' && path.win32.isAbsolute(request))

    // make sure import "next" shows a warning when imported
    // in pages/components
    if (request === 'next') {
      return `commonjs next/dist/lib/import-next-warning`
    }

    const isAppLayer = (
      [
        WEBPACK_LAYERS.reactServerComponents,
        WEBPACK_LAYERS.serverSideRendering,
        WEBPACK_LAYERS.appPagesBrowser,
        WEBPACK_LAYERS.actionBrowser,
        WEBPACK_LAYERS.appRouteHandler,
      ] as WebpackLayerName[]
    ).includes(layer!)

    // Relative requires don't need custom resolution, because they
    // are relative to requests we've already resolved here.
    // Absolute requires (require('/foo')) are extremely uncommon, but
    // also have no need for customization as they're already resolved.
    if (!isLocal) {
      if (/^(?:next$)/.test(request)) {
        return `commonjs ${request}`
      }

      if (reactPackagesRegex.test(request) && !isAppLayer) {
        return `commonjs ${request}`
      }

      const notExternalModules =
        /^(?:private-next-pages\/|next\/(?:dist\/pages\/|(?:app|document|link|image|legacy\/image|constants|dynamic|script|navigation|headers|router)$)|string-hash|private-next-rsc-action-validate|private-next-rsc-action-client-wrapper|private-next-rsc-action-proxy$)/
      if (notExternalModules.test(request)) {
        return
      }
    }

    // @swc/helpers should not be external as it would
    // require hoisting the package which we can't rely on
    if (request.includes('@swc/helpers')) {
      return
    }

    // __barrel_optimize__ is a special marker that tells Next.js to
    // optimize the import by removing unused exports. This has to be compiled.
    if (request.startsWith('__barrel_optimize__')) {
      return
    }

    // When in esm externals mode, and using import, we resolve with
    // ESM resolving options.
    // Also disable esm request when appDir is enabled
    const isEsmRequested = dependencyType === 'esm'

    /**
     * @param localRes the full path to the file
     * @returns the externalized path
     * @description returns an externalized path if the file is a Next.js file and ends with either `.shared-runtime.js` or `.external.js`
     * This is used to ensure that files used across the rendering runtime(s) and the user code are one and the same. The logic in this function
     * will rewrite the require to the correct bundle location depending on the layer at which the file is being used.
     */
    const resolveNextExternal = (localRes: string) => {
      const isExternal = externalPattern.test(localRes)

      // if the file ends with .external, we need to make it a commonjs require in all cases
      // this is used mainly to share the async local storage across the routing, rendering and user layers.
      if (isExternal) {
        // it's important we return the path that starts with `next/dist/` here instead of the absolute path
        // otherwise NFT will get tripped up
        return `commonjs ${localRes.replace(/.*?next[/\\]dist/, 'next/dist')}`
      }
    }

    // Don't bundle @vercel/og nodejs bundle for nodejs runtime.
    // TODO-APP: bundle route.js with different layer that externals common node_module deps.
    if (
      isWebpackServerLayer(layer) &&
      request === 'next/dist/compiled/@vercel/og/index.node.js'
    ) {
      return `module ${request}`
    }

    // Specific Next.js imports that should remain external
    // TODO-APP: Investigate if we can remove this.
    if (request.startsWith('next/dist/')) {
      // Image loader needs to be transpiled
      if (/^next\/dist\/shared\/lib\/image-loader/.test(request)) {
        return
      }

      if (/^next\/dist\/compiled\/next-server/.test(request)) {
        return `commonjs ${request}`
      }

      if (
        /^next\/dist\/shared\/(?!lib\/router\/router)/.test(request) ||
        /^next\/dist\/compiled\/.*\.c?js$/.test(request)
      ) {
        return `commonjs ${request}`
      }

      if (
        /^next\/dist\/esm\/shared\/(?!lib\/router\/router)/.test(request) ||
        /^next\/dist\/compiled\/.*\.mjs$/.test(request)
      ) {
        return `module ${request}`
      }

      return resolveNextExternal(request)
    }

    // Early return if the request needs to be bundled, such as in the client layer.
    // Treat react packages and next internals as external for SSR layer,
    // also map react to builtin ones with require-hook.
    if (layer === WEBPACK_LAYERS.serverSideRendering) {
      const isRelative = request.startsWith('.')
      const fullRequest = isRelative
        ? path.join(context, request).replace(/\\/g, '/')
        : request
      return resolveNextExternal(fullRequest)
    }

    // TODO-APP: Let's avoid this resolve call as much as possible, and eventually get rid of it.
    const resolveResult = await resolveExternal(
      dir,
      config.experimental.esmExternals,
      context,
      request,
      isEsmRequested,
      hasAppDir,
      getResolve,
      isLocal ? resolveNextExternal : undefined
    )

    if ('localRes' in resolveResult) {
      return resolveResult.localRes
    }

    // Forcedly resolve the styled-jsx installed by next.js,
    // since `resolveExternal` cannot find the styled-jsx dep with pnpm
    if (request === 'styled-jsx/style') {
      resolveResult.res = defaultOverrides['styled-jsx/style']
    }

    const { res, isEsm } = resolveResult

    // If the request cannot be resolved we need to have
    // webpack "bundle" it so it surfaces the not found error.
    if (!res) {
      return
    }

    // ESM externals can only be imported (and not required).
    // Make an exception in loose mode.
    if (!isEsmRequested && isEsm && !looseEsmExternals) {
      throw new Error(
        `ESM packages (${request}) need to be imported. Use 'import' to reference the package instead. https://nextjs.org/docs/messages/import-esm-externals`
      )
    }

    const externalType = isEsm ? 'module' : 'commonjs'

    // Default pages have to be transpiled
    if (
      // This is the @babel/plugin-transform-runtime "helpers: true" option
      /node_modules[/\\]@babel[/\\]runtime[/\\]/.test(res)
    ) {
      return
    }

    // Webpack itself has to be compiled because it doesn't always use module relative paths
    if (
      /node_modules[/\\]webpack/.test(res) ||
      /node_modules[/\\]css-loader/.test(res)
    ) {
      return
    }

    // If a package should be transpiled by Next.js, we skip making it external.
    // It doesn't matter what the extension is, as we'll transpile it anyway.
    if (config.transpilePackages && !resolvedExternalPackageDirs) {
      resolvedExternalPackageDirs = new Map()
      // We need to resolve all the external package dirs initially.
      for (const pkg of config.transpilePackages) {
        const pkgRes = await resolveExternal(
          dir,
          config.experimental.esmExternals,
          context,
          pkg + '/package.json',
          hasAppDir,
          isEsmRequested,
          getResolve,
          isLocal ? resolveNextExternal : undefined
        )
        if (pkgRes.res) {
          resolvedExternalPackageDirs.set(pkg, path.dirname(pkgRes.res))
        }
      }
    }

    // If a package is included in `transpilePackages`, we don't want to make it external.
    // And also, if that resource is an ES module, we bundle it too because we can't
    // rely on the require hook to alias `react` to our precompiled version.
    const shouldBeBundled =
      isResourceInPackages(
        res,
        config.transpilePackages,
        resolvedExternalPackageDirs
      ) ||
      (isEsm && isAppLayer)

    if (/node_modules[/\\].*\.[mc]?js$/.test(res)) {
      if (isWebpackServerLayer(layer)) {
        // All packages should be bundled for the server layer if they're not opted out.
        // This option takes priority over the transpilePackages option.

        if (optOutBundlingPackageRegex.test(res)) {
          return `${externalType} ${request}`
        }

        return
      }

      if (shouldBeBundled) return

      // Anything else that is standard JavaScript within `node_modules`
      // can be externalized.
      return `${externalType} ${request}`
    }

    if (shouldBeBundled) return

    // Default behavior: bundle the code!
  }

  const shouldIncludeExternalDirs =
    config.experimental.externalDir || !!config.transpilePackages

  const codeCondition = {
    test: /\.(tsx|ts|js|cjs|mjs|jsx)$/,
    ...(shouldIncludeExternalDirs
      ? // Allowing importing TS/TSX files from outside of the root dir.
        {}
      : { include: [dir, ...babelIncludeRegexes] }),
    exclude: (excludePath: string) => {
      if (babelIncludeRegexes.some((r) => r.test(excludePath))) {
        return false
      }

      const shouldBeBundled = isResourceInPackages(
        excludePath,
        config.transpilePackages
      )
      if (shouldBeBundled) return false

      return excludePath.includes('node_modules')
    },
  }

  let webpackConfig: webpack.Configuration = {
    parallelism: Number(process.env.NEXT_WEBPACK_PARALLELISM) || undefined,
    ...(isNodeServer ? { externalsPresets: { node: true } } : {}),
    // @ts-ignore
    externals:
      isClient || isEdgeServer
        ? // make sure importing "next" is handled gracefully for client
          // bundles in case a user imported types and it wasn't removed
          // TODO: should we warn/error for this instead?
          [
            'next',
            ...(isEdgeServer
              ? [
                  {
                    '@builder.io/partytown': '{}',
                    'next/dist/compiled/etag': '{}',
                    'next/dist/compiled/chalk': '{}',
                  },
                  getEdgePolyfilledModules(),
                  handleWebpackExternalForEdgeRuntime,
                ]
              : []),
          ]
        : [
            ({
              context,
              request,
              dependencyType,
              contextInfo,
              getResolve,
            }: {
              context: string
              request: string
              dependencyType: string
              contextInfo: {
                issuer: string
                issuerLayer: string | null
                compiler: string
              }
              getResolve: (
                options: any
              ) => (
                resolveContext: string,
                resolveRequest: string,
                callback: (
                  err?: Error,
                  result?: string,
                  resolveData?: { descriptionFileData?: { type?: any } }
                ) => void
              ) => void
            }) =>
              handleExternals(
                context,
                request,
                dependencyType,
                contextInfo.issuerLayer as WebpackLayerName,
                (options) => {
                  const resolveFunction = getResolve(options)
                  return (resolveContext: string, requestToResolve: string) =>
                    new Promise((resolve, reject) => {
                      resolveFunction(
                        resolveContext,
                        requestToResolve,
                        (err, result, resolveData) => {
                          if (err) return reject(err)
                          if (!result) return resolve([null, false])
                          const isEsm = /\.js$/i.test(result)
                            ? resolveData?.descriptionFileData?.type ===
                              'module'
                            : /\.mjs$/i.test(result)
                          resolve([result, isEsm])
                        }
                      )
                    })
                }
              ),
          ],
    optimization: {
      emitOnErrors: !dev,
      checkWasmTypes: false,
      nodeEnv: false,
      splitChunks: (():
        | Required<webpack.Configuration>['optimization']['splitChunks']
        | false => {
        if (dev) {
          if (isNodeServer) {
            /*
              In development, we want to split code that comes from `node_modules` into their own chunks.
              This is because in development, we often need to reload the user bundle due to changes in the code.
              To work around this, we put all the vendor code into separate chunks so that we don't need to reload them.
              This is safe because the vendor code doesn't change between reloads.
            */
            const extractRootNodeModule = (modulePath: string) => {
              // This regex is used to extract the root node module name to be used as the chunk group name.
              // example: ../../node_modules/.pnpm/next@10/foo/node_modules/bar -> next@10
              const regex =
                /node_modules(?:\/|\\)\.?(?:pnpm(?:\/|\\))?([^/\\]+)/
              const match = modulePath.match(regex)
              return match ? match[1] : null
            }
            return {
              cacheGroups: {
                // this chunk configuration gives us a separate chunk for each top level module in node_modules
                // or a hashed chunk if we can't extract the module name.
                vendor: {
                  chunks: 'all',
                  reuseExistingChunk: true,
                  test: /[\\/]node_modules[\\/]/,
                  minSize: 0,
                  minChunks: 1,
                  maxAsyncRequests: 300,
                  maxInitialRequests: 300,
                  name: (module: webpack.Module) => {
                    const moduleId = module.nameForCondition()!
                    const rootModule = extractRootNodeModule(moduleId)
                    if (rootModule) {
                      return `vendor-chunks/${rootModule}`
                    } else {
                      const hash = crypto.createHash('sha1').update(moduleId)
                      hash.update(moduleId)
                      return `vendor-chunks/${hash.digest('hex')}`
                    }
                  },
                },
                // disable the default chunk groups
                default: false,
                defaultVendors: false,
              },
            }
          }

          return false
        }

        if (isNodeServer) {
          return {
            filename: '[name].js',
            chunks: 'all',
            minSize: 1000,
          }
        }

        if (isEdgeServer) {
          return {
            filename: 'edge-chunks/[name].js',
            minChunks: 2,
          }
        }

        return {
          // Keep main and _app chunks unsplitted in webpack 5
          // as we don't need a separate vendor chunk from that
          // and all other chunk depend on them so there is no
          // duplication that need to be pulled out.
          chunks: (chunk: any) =>
            !/^(polyfills|main|pages\/_app)$/.test(chunk.name),
          cacheGroups: {
            framework: {
              chunks: 'all',
              name: 'framework',
              // Ensures the framework chunk is not created for App Router.
              layer: isWebpackDefaultLayer,
              test(module: any) {
                const resource = module.nameForCondition?.()
                return resource
                  ? topLevelFrameworkPaths.some((pkgPath) =>
                      resource.startsWith(pkgPath)
                    )
                  : false
              },
              priority: 40,
              // Don't let webpack eliminate this chunk (prevents this chunk from
              // becoming a part of the commons chunk)
              enforce: true,
            },
            lib: {
              test(module: {
                size: Function
                nameForCondition: Function
              }): boolean {
                return (
                  module.size() > 160000 &&
                  /node_modules[/\\]/.test(module.nameForCondition() || '')
                )
              },
              name(module: {
                layer: string | null | undefined
                type: string
                libIdent?: Function
                updateHash: (hash: crypto.Hash) => void
              }): string {
                const hash = crypto.createHash('sha1')
                if (isModuleCSS(module)) {
                  module.updateHash(hash)
                } else {
                  if (!module.libIdent) {
                    throw new Error(
                      `Encountered unknown module type: ${module.type}. Please open an issue.`
                    )
                  }
                  hash.update(module.libIdent({ context: dir }))
                }

                // Ensures the name of the chunk is not the same between two modules in different layers
                // E.g. if you import 'button-library' in App Router and Pages Router we don't want these to be bundled in the same chunk
                // as they're never used on the same page.
                if (module.layer) {
                  hash.update(module.layer)
                }

                return hash.digest('hex').substring(0, 8)
              },
              priority: 30,
              minChunks: 1,
              reuseExistingChunk: true,
            },
          },
          maxInitialRequests: 25,
          minSize: 20000,
        }
      })(),
      runtimeChunk: isClient
        ? { name: CLIENT_STATIC_FILES_RUNTIME_WEBPACK }
        : undefined,
      minimize:
        !dev &&
        (isClient ||
          isEdgeServer ||
          (isNodeServer && config.experimental.serverMinification)),
      minimizer: [
        // Minify JavaScript
        (compiler: webpack.Compiler) => {
          // @ts-ignore No typings yet
          const {
            TerserPlugin,
          } = require('./webpack/plugins/terser-webpack-plugin/src/index.js')
          new TerserPlugin({
            cacheDir: path.join(distDir, 'cache', 'next-minifier'),
            parallel: config.experimental.cpus,
            swcMinify: config.swcMinify,
            terserOptions: {
              ...terserOptions,
              compress: {
                ...terserOptions.compress,
              },
              mangle: {
                ...terserOptions.mangle,
              },
            },
          }).apply(compiler)
        },
        // Minify CSS
        (compiler: webpack.Compiler) => {
          const {
            CssMinimizerPlugin,
          } = require('./webpack/plugins/css-minimizer-plugin')
          new CssMinimizerPlugin({
            postcssOptions: {
              map: {
                // `inline: false` generates the source map in a separate file.
                // Otherwise, the CSS file is needlessly large.
                inline: false,
                // `annotation: false` skips appending the `sourceMappingURL`
                // to the end of the CSS file. Webpack already handles this.
                annotation: false,
              },
            },
          }).apply(compiler)
        },
      ],
    },
    context: dir,
    // Kept as function to be backwards compatible
    entry: async () => {
      return {
        ...(clientEntries ? clientEntries : {}),
        ...entrypoints,
      }
    },
    watchOptions,
    output: {
      // we must set publicPath to an empty value to override the default of
      // auto which doesn't work in IE11
      publicPath: `${
        config.assetPrefix
          ? config.assetPrefix.endsWith('/')
            ? config.assetPrefix.slice(0, -1)
            : config.assetPrefix
          : ''
      }/_next/`,
      path: !dev && isNodeServer ? path.join(outputPath, 'chunks') : outputPath,
      // On the server we don't use hashes
      filename: isNodeOrEdgeCompilation
        ? dev || isEdgeServer
          ? `[name].js`
          : `../[name].js`
        : `static/chunks/${isDevFallback ? 'fallback/' : ''}[name]${
            dev ? '' : appDir ? '-[chunkhash]' : '-[contenthash]'
          }.js`,
      library: isClient || isEdgeServer ? '_N_E' : undefined,
      libraryTarget: isClient || isEdgeServer ? 'assign' : 'commonjs2',
      hotUpdateChunkFilename: 'static/webpack/[id].[fullhash].hot-update.js',
      hotUpdateMainFilename:
        'static/webpack/[fullhash].[runtime].hot-update.json',
      // This saves chunks with the name given via `import()`
      chunkFilename: isNodeOrEdgeCompilation
        ? '[name].js'
        : `static/chunks/${isDevFallback ? 'fallback/' : ''}${
            dev ? '[name]' : '[name].[contenthash]'
          }.js`,
      strictModuleExceptionHandling: true,
      crossOriginLoading: crossOrigin,
      webassemblyModuleFilename: 'static/wasm/[modulehash].wasm',
      hashFunction: 'xxhash64',
      hashDigestLength: 16,
    },
    performance: false,
    resolve: resolveConfig,
    resolveLoader: {
      // The loaders Next.js provides
      alias: [
        'error-loader',
        'next-swc-loader',
        'next-client-pages-loader',
        'next-image-loader',
        'next-metadata-image-loader',
        'next-style-loader',
        'next-flight-loader',
        'next-flight-client-entry-loader',
        'next-flight-action-entry-loader',
        'next-flight-client-module-loader',
        'noop-loader',
        'next-middleware-loader',
        'next-edge-function-loader',
        'next-edge-app-route-loader',
        'next-edge-ssr-loader',
        'next-middleware-asset-loader',
        'next-middleware-wasm-loader',
        'next-app-loader',
        'next-route-loader',
        'next-font-loader',
        'next-invalid-import-error-loader',
        'next-metadata-route-loader',
        'modularize-import-loader',
        'next-barrel-loader',
      ].reduce((alias, loader) => {
        // using multiple aliases to replace `resolveLoader.modules`
        alias[loader] = path.join(__dirname, 'webpack', 'loaders', loader)

        return alias
      }, {} as Record<string, string>),
      modules: [
        'node_modules',
        ...nodePathList, // Support for NODE_PATH environment variable
      ],
      plugins: [],
    },
    module: {
      rules: [
        {
          // This loader rule passes the resource to the SWC loader with
          // `optimizeBarrelExports` enabled. This option makes the SWC to
          // transform the original code to be a JSON of its export map, so
          // the barrel loader can analyze it and only keep the needed ones.
          test: /__barrel_transform__/,
          use: ({ resourceQuery }: { resourceQuery: string }) => {
            const isFromWildcardExport = /[&?]wildcard/.test(resourceQuery)

            return [
              getSwcLoader({
                hasServerComponents: false,
                optimizeBarrelExports: {
                  wildcard: isFromWildcardExport,
                },
              }),
            ]
          },
        },
        {
          // This loader rule works like a bridge between user's import and
          // the target module behind a package's barrel file. It reads SWC's
          // analysis result from the previous loader, and directly returns the
          // code that only exports values that are asked by the user.
          test: /__barrel_optimize__/,
          use: ({ resourceQuery }: { resourceQuery: string }) => {
            const names = (
              resourceQuery.match(/\?names=([^&]+)/)?.[1] || ''
            ).split(',')
            const isFromWildcardExport = /[&?]wildcard/.test(resourceQuery)

            return [
              {
                loader: 'next-barrel-loader',
                options: {
                  names,
                  wildcard: isFromWildcardExport,
                },
                // This is part of the request value to serve as the module key.
                // The barrel loader are no-op re-exported modules keyed by
                // export names.
                ident: 'next-barrel-loader:' + resourceQuery,
              },
            ]
          },
        },
        // Alias server-only and client-only to proper exports based on bundling layers
        {
          issuerLayer: {
            or: WEBPACK_LAYERS.GROUP.serverTarget,
          },
          resolve: {
            // Error on client-only but allow server-only
            alias: {
              'server-only$': 'next/dist/compiled/server-only/empty',
              'client-only$': 'next/dist/compiled/client-only/error',
              'next/dist/compiled/server-only$':
                'next/dist/compiled/server-only/empty',
            },
          },
        },
        {
          issuerLayer: {
            not: WEBPACK_LAYERS.GROUP.serverTarget,
          },
          resolve: {
            // Error on server-only but allow client-only
            alias: {
              'server-only$': 'next/dist/compiled/server-only/index',
              'client-only$': 'next/dist/compiled/client-only/index',
              'next/dist/compiled/client-only$':
                'next/dist/compiled/client-only/index',
              'next/dist/compiled/server-only':
                'next/dist/compiled/server-only/index',
            },
          },
        },
        // Detect server-only / client-only imports and error in build time
        {
          test: [
            /^client-only$/,
            /next[\\/]dist[\\/]compiled[\\/]client-only[\\/]error/,
          ],
          loader: 'next-invalid-import-error-loader',
          issuerLayer: {
            or: WEBPACK_LAYERS.GROUP.serverTarget,
          },
          options: {
            message:
              "'client-only' cannot be imported from a Server Component module. It should only be used from a Client Component.",
          },
        },
        {
          test: [
            /^server-only$/,
            /next[\\/]dist[\\/]compiled[\\/]server-only[\\/]index/,
          ],
          loader: 'next-invalid-import-error-loader',
          issuerLayer: {
            not: WEBPACK_LAYERS.GROUP.serverTarget,
          },
          options: {
            message:
              "'server-only' cannot be imported from a Client Component module. It should only be used from a Server Component.",
          },
        },
        ...(hasAppDir
          ? [
              {
                layer: WEBPACK_LAYERS.appRouteHandler,
                test: new RegExp(
                  `private-next-app-dir\\/.*\\/route\\.(${pageExtensions.join(
                    '|'
                  )})$`
                ),
              },
              {
                // Make sure that AsyncLocalStorage module instance is shared between server and client
                // layers.
                layer: WEBPACK_LAYERS.shared,
                test: asyncStoragesRegex,
              },
              // Convert metadata routes to separate layer
              {
                resourceQuery: new RegExp(
                  WEBPACK_RESOURCE_QUERIES.metadataRoute
                ),
                layer: WEBPACK_LAYERS.appMetadataRoute,
              },
              {
                // Ensure that the app page module is in the client layers, this
                // enables React to work correctly for RSC.
                layer: WEBPACK_LAYERS.serverSideRendering,
                test: /next[\\/]dist[\\/](esm[\\/])?server[\\/]future[\\/]route-modules[\\/]app-page[\\/]module/,
              },
              {
                // All app dir layers need to use this configured resolution logic
                issuerLayer: {
                  or: [
                    WEBPACK_LAYERS.reactServerComponents,
                    WEBPACK_LAYERS.serverSideRendering,
                    WEBPACK_LAYERS.appPagesBrowser,
                    WEBPACK_LAYERS.actionBrowser,
                    WEBPACK_LAYERS.shared,
                  ],
                },
                resolve: {
                  alias: {
                    // Alias next/head component to noop for RSC
                    [require.resolve('next/head')]: require.resolve(
                      'next/dist/client/components/noop-head'
                    ),
                    // Alias next/dynamic
                    [require.resolve('next/dynamic')]: require.resolve(
                      'next/dist/shared/lib/app-dynamic'
                    ),
                  },
                },
              },
            ]
          : []),
        ...(hasAppDir && !isClient
          ? [
              {
                issuerLayer: isWebpackServerLayer,
                test: {
                  // Resolve it if it is a source code file, and it has NOT been
                  // opted out of bundling.
                  and: [
                    codeCondition.test,
                    {
                      not: [optOutBundlingPackageRegex, asyncStoragesRegex],
                    },
                  ],
                },
                resolve: {
                  conditionNames: reactServerCondition,
                  // If missing the alias override here, the default alias will be used which aliases
                  // react to the direct file path, not the package name. In that case the condition
                  // will be ignored completely.
                  alias: createRSCAliases(bundledReactChannel, {
                    reactServerCondition: true,
                    // No server components profiling
                    reactProductionProfiling,
                    layer: WEBPACK_LAYERS.reactServerComponents,
                    isEdgeServer,
                  }),
                },
                use: {
                  loader: 'next-flight-loader',
                },
              },
            ]
          : []),
        // TODO: FIXME: do NOT webpack 5 support with this
        // x-ref: https://github.com/webpack/webpack/issues/11467
        ...(!config.experimental.fullySpecified
          ? [
              {
                test: /\.m?js/,
                resolve: {
                  fullySpecified: false,
                },
              } as any,
            ]
          : []),
        ...(hasAppDir && isEdgeServer
          ? [
              // The Edge bundle includes the server in its entrypoint, so it has to
              // be in the SSR layer — here we convert the actual page request to
              // the RSC layer via a webpack rule.
              {
                resourceQuery: new RegExp(
                  WEBPACK_RESOURCE_QUERIES.edgeSSREntry
                ),
                layer: WEBPACK_LAYERS.reactServerComponents,
              },
            ]
          : []),
        ...(hasServerComponents
          ? [
              {
                // Alias react-dom for ReactDOM.preload usage.
                // Alias react for switching between default set and share subset.
                oneOf: [
                  {
                    exclude: [asyncStoragesRegex],
                    issuerLayer: isWebpackServerLayer,
                    test: {
                      // Resolve it if it is a source code file, and it has NOT been
                      // opted out of bundling.
                      and: [
                        codeCondition.test,
                        {
                          not: [optOutBundlingPackageRegex],
                        },
                      ],
                    },
                    resolve: {
                      // It needs `conditionNames` here to require the proper asset,
                      // when react is acting as dependency of compiled/react-dom.
                      alias: createRSCAliases(bundledReactChannel, {
                        reactServerCondition: true,
                        reactProductionProfiling,
                        layer: WEBPACK_LAYERS.reactServerComponents,
                        isEdgeServer,
                      }),
                    },
                  },
                  {
                    test: codeCondition.test,
                    issuerLayer: WEBPACK_LAYERS.serverSideRendering,
                    resolve: {
                      alias: createRSCAliases(bundledReactChannel, {
                        reactServerCondition: false,
                        reactProductionProfiling,
                        layer: WEBPACK_LAYERS.serverSideRendering,
                        isEdgeServer,
                      }),
                    },
                  },
                ],
              },
              {
                test: codeCondition.test,
                issuerLayer: WEBPACK_LAYERS.appPagesBrowser,
                resolve: {
                  alias: createRSCAliases(bundledReactChannel, {
                    // Only alias server rendering stub in client SSR layer.
                    // reactSharedSubset: false,
                    // reactDomServerRenderingStub: false,
                    reactServerCondition: false,
                    reactProductionProfiling,
                    // browser: isClient,
                    layer: WEBPACK_LAYERS.appPagesBrowser,
                    isEdgeServer,
                  }),
                },
              },
            ]
          : []),
        {
          oneOf: [
            {
              ...codeCondition,
              issuerLayer: WEBPACK_LAYERS.api,
              parser: {
                // Switch back to normal URL handling
                url: true,
              },
              use: loaderForAPIRoutes,
            },
            {
              test: codeCondition.test,
              issuerLayer: WEBPACK_LAYERS.middleware,
              use: swcLoaderForMiddlewareLayer,
            },
            ...(hasServerComponents
              ? [
                  {
                    test: codeCondition.test,
                    issuerLayer: isWebpackServerLayer,
                    exclude: [asyncStoragesRegex],
                    use: swcLoaderForServerLayer,
                  },
                  {
                    test: codeCondition.test,
                    resourceQuery: new RegExp(
                      WEBPACK_RESOURCE_QUERIES.edgeSSREntry
                    ),
                    use: swcLoaderForServerLayer,
                  },
                  {
                    ...codeCondition,
                    issuerLayer: [
                      WEBPACK_LAYERS.appPagesBrowser,
                      WEBPACK_LAYERS.serverSideRendering,
                    ],
                    exclude: [codeCondition.exclude],
                    use: swcLoaderForClientLayer,
                  },
                ]
              : []),
            {
              ...codeCondition,
              use:
                dev && isClient
                  ? [
                      require.resolve(
                        'next/dist/compiled/@next/react-refresh-utils/dist/loader'
                      ),
                      defaultLoaders.babel,
                    ]
                  : defaultLoaders.babel,
            },
          ],
        },
        ...(!config.images.disableStaticImages
          ? [
              {
                test: nextImageLoaderRegex,
                loader: 'next-image-loader',
                issuer: { not: regexLikeCss },
                dependency: { not: ['url'] },
                resourceQuery: {
                  not: [
                    new RegExp(WEBPACK_RESOURCE_QUERIES.metadata),
                    new RegExp(WEBPACK_RESOURCE_QUERIES.metadataRoute),
                    new RegExp(WEBPACK_RESOURCE_QUERIES.metadataImageMeta),
                  ],
                },
                options: {
                  isDev: dev,
                  compilerType,
                  basePath: config.basePath,
                  assetPrefix: config.assetPrefix,
                },
              },
            ]
          : []),
        ...(isEdgeServer
          ? [
              {
                resolve: {
                  fallback: {
                    process: require.resolve('./polyfills/process'),
                  },
                },
              },
            ]
          : isClient
          ? [
              {
                resolve: {
                  fallback:
                    config.experimental.fallbackNodePolyfills === false
                      ? {
                          assert: false,
                          buffer: false,
                          constants: false,
                          crypto: false,
                          domain: false,
                          http: false,
                          https: false,
                          os: false,
                          path: false,
                          punycode: false,
                          process: false,
                          querystring: false,
                          stream: false,
                          string_decoder: false,
                          sys: false,
                          timers: false,
                          tty: false,
                          util: false,
                          vm: false,
                          zlib: false,
                          events: false,
                          setImmediate: false,
                        }
                      : {
                          assert: require.resolve('next/dist/compiled/assert'),
                          buffer: require.resolve('next/dist/compiled/buffer/'),
                          constants: require.resolve(
                            'next/dist/compiled/constants-browserify'
                          ),
                          crypto: require.resolve(
                            'next/dist/compiled/crypto-browserify'
                          ),
                          domain: require.resolve(
                            'next/dist/compiled/domain-browser'
                          ),
                          http: require.resolve(
                            'next/dist/compiled/stream-http'
                          ),
                          https: require.resolve(
                            'next/dist/compiled/https-browserify'
                          ),
                          os: require.resolve(
                            'next/dist/compiled/os-browserify'
                          ),
                          path: require.resolve(
                            'next/dist/compiled/path-browserify'
                          ),
                          punycode: require.resolve(
                            'next/dist/compiled/punycode'
                          ),
                          process: require.resolve('./polyfills/process'),
                          // Handled in separate alias
                          querystring: require.resolve(
                            'next/dist/compiled/querystring-es3'
                          ),
                          stream: require.resolve(
                            'next/dist/compiled/stream-browserify'
                          ),
                          string_decoder: require.resolve(
                            'next/dist/compiled/string_decoder'
                          ),
                          sys: require.resolve('next/dist/compiled/util/'),
                          timers: require.resolve(
                            'next/dist/compiled/timers-browserify'
                          ),
                          tty: require.resolve(
                            'next/dist/compiled/tty-browserify'
                          ),
                          // Handled in separate alias
                          // url: require.resolve('url/'),
                          util: require.resolve('next/dist/compiled/util/'),
                          vm: require.resolve(
                            'next/dist/compiled/vm-browserify'
                          ),
                          zlib: require.resolve(
                            'next/dist/compiled/browserify-zlib'
                          ),
                          events: require.resolve('next/dist/compiled/events/'),
                          setImmediate: require.resolve(
                            'next/dist/compiled/setimmediate'
                          ),
                        },
                },
              },
            ]
          : []),
        {
          // Mark `image-response.js` as side-effects free to make sure we can
          // tree-shake it if not used.
          test: /[\\/]next[\\/]dist[\\/](esm[\\/])?server[\\/]web[\\/]exports[\\/]image-response\.js/,
          sideEffects: false,
        },
      ].filter(Boolean),
    },
    plugins: [
      isNodeServer &&
        new webpack.NormalModuleReplacementPlugin(
          /\.\/(.+)\.shared-runtime$/,
          function (resource) {
            const moduleName = path.basename(
              resource.request,
              '.shared-runtime'
            )
            const layer = resource.contextInfo.issuerLayer

            let runtime

            switch (layer) {
              case WEBPACK_LAYERS.appRouteHandler:
                runtime = 'app-route'
                break
              case WEBPACK_LAYERS.serverSideRendering:
              case WEBPACK_LAYERS.reactServerComponents:
              case WEBPACK_LAYERS.appPagesBrowser:
              case WEBPACK_LAYERS.actionBrowser:
                runtime = 'app-page'
                break
              default:
                runtime = 'pages'
            }

            resource.request = `next/dist/server/future/route-modules/${runtime}/vendored/contexts/${moduleName}`
          }
        ),
      dev && new MemoryWithGcCachePlugin({ maxGenerations: 5 }),
      dev && isClient && new ReactRefreshWebpackPlugin(webpack),
      // Makes sure `Buffer` and `process` are polyfilled in client and flight bundles (same behavior as webpack 4)
      (isClient || isEdgeServer) &&
        new webpack.ProvidePlugin({
          // Buffer is used by getInlineScriptSource
          Buffer: [require.resolve('buffer'), 'Buffer'],
          // Avoid process being overridden when in web run time
          ...(isClient && { process: [require.resolve('process')] }),
        }),
      new webpack.DefinePlugin(
        getDefineEnv({
          allowedRevalidateHeaderKeys,
          clientRouterFilters,
          config,
          dev,
          distDir,
          fetchCacheKeyPrefix,
          hasRewrites,
          isClient,
          isEdgeServer,
          isNodeOrEdgeCompilation,
          isNodeServer,
          middlewareMatchers,
          previewModeId,
          useServerActions,
        })
      ),
      isClient &&
        new ReactLoadablePlugin({
          filename: REACT_LOADABLE_MANIFEST,
          pagesDir,
          runtimeAsset: `server/${MIDDLEWARE_REACT_LOADABLE_MANIFEST}.js`,
          dev,
        }),
      (isClient || isEdgeServer) && new DropClientPage(),
      config.outputFileTracing &&
        isNodeServer &&
        !dev &&
        new (require('./webpack/plugins/next-trace-entrypoints-plugin')
          .TraceEntryPointsPlugin as typeof import('./webpack/plugins/next-trace-entrypoints-plugin').TraceEntryPointsPlugin)(
          {
            rootDir: dir,
            appDir: appDir,
            pagesDir: pagesDir,
            esmExternals: config.experimental.esmExternals,
            outputFileTracingRoot: config.experimental.outputFileTracingRoot,
            appDirEnabled: hasAppDir,
            turbotrace: config.experimental.turbotrace,
            traceIgnores: config.experimental.outputFileTracingIgnores || [],
          }
        ),
      // Moment.js is an extremely popular library that bundles large locale files
      // by default due to how Webpack interprets its code. This is a practical
      // solution that requires the user to opt into importing specific locales.
      // https://github.com/jmblog/how-to-optimize-momentjs-with-webpack
      config.excludeDefaultMomentLocales &&
        new webpack.IgnorePlugin({
          resourceRegExp: /^\.\/locale$/,
          contextRegExp: /moment$/,
        }),
      ...(dev
        ? (() => {
            // Even though require.cache is server only we have to clear assets from both compilations
            // This is because the client compilation generates the build manifest that's used on the server side
            const {
              NextJsRequireCacheHotReloader,
            } = require('./webpack/plugins/nextjs-require-cache-hot-reloader')
            const devPlugins = [
              new NextJsRequireCacheHotReloader({
                hasServerComponents,
              }),
            ]

            if (isClient || isEdgeServer) {
              devPlugins.push(new webpack.HotModuleReplacementPlugin())
            }

            return devPlugins
          })()
        : []),
      !dev &&
        new webpack.IgnorePlugin({
          resourceRegExp: /react-is/,
          contextRegExp: /next[\\/]dist[\\/]/,
        }),
      isNodeOrEdgeCompilation &&
        new PagesManifestPlugin({
          dev,
          isEdgeRuntime: isEdgeServer,
          appDirEnabled: hasAppDir,
        }),
      // MiddlewarePlugin should be after DefinePlugin so  NEXT_PUBLIC_*
      // replacement is done before its process.env.* handling
      isEdgeServer &&
        new MiddlewarePlugin({
          dev,
          sriEnabled: !dev && !!config.experimental.sri?.algorithm,
        }),
      isClient &&
        new BuildManifestPlugin({
          buildId,
          rewrites,
          isDevFallback,
          exportRuntime: true,
          appDirEnabled: hasAppDir,
        }),
      new ProfilingPlugin({ runWebpackSpan }),
      config.optimizeFonts &&
        !dev &&
        isNodeServer &&
        (function () {
          const { FontStylesheetGatheringPlugin } =
            require('./webpack/plugins/font-stylesheet-gathering-plugin') as {
              FontStylesheetGatheringPlugin: typeof import('./webpack/plugins/font-stylesheet-gathering-plugin').FontStylesheetGatheringPlugin
            }
          return new FontStylesheetGatheringPlugin({
            adjustFontFallbacks: config.experimental.adjustFontFallbacks,
            adjustFontFallbacksWithSizeAdjust:
              config.experimental.adjustFontFallbacksWithSizeAdjust,
          })
        })(),
      new WellKnownErrorsPlugin(),
      isClient &&
        new CopyFilePlugin({
          filePath: require.resolve('./polyfills/polyfill-nomodule'),
          cacheKey: process.env.__NEXT_VERSION as string,
          name: `static/chunks/polyfills${dev ? '' : '-[hash]'}.js`,
          minimize: false,
          info: {
            [CLIENT_STATIC_FILES_RUNTIME_POLYFILLS_SYMBOL]: 1,
            // This file is already minified
            minimized: true,
          },
        }),
      hasAppDir && isClient && new AppBuildManifestPlugin({ dev }),
      hasServerComponents &&
        (isClient
          ? new ClientReferenceManifestPlugin({
              dev,
              appDir,
            })
          : new FlightClientEntryPlugin({
              appDir,
              dev,
              isEdgeServer,
              useServerActions,
            })),
      hasAppDir &&
        !isClient &&
        new NextTypesPlugin({
          dir,
          distDir: config.distDir,
          appDir,
          dev,
          isEdgeServer,
          pageExtensions: config.pageExtensions,
          typedRoutes: enableTypedRoutes,
          originalRewrites,
          originalRedirects,
        }),
      !dev &&
        isClient &&
        !!config.experimental.sri?.algorithm &&
        new SubresourceIntegrityPlugin(config.experimental.sri.algorithm),
      isClient &&
        new NextFontManifestPlugin({
          appDir,
        }),
      !dev &&
        isClient &&
        new (require('./webpack/plugins/telemetry-plugin').TelemetryPlugin)(
          new Map(
            [
              ['swcLoader', useSWCLoader],
              ['swcMinify', config.swcMinify],
              ['swcRelay', !!config.compiler?.relay],
              ['swcStyledComponents', !!config.compiler?.styledComponents],
              [
                'swcReactRemoveProperties',
                !!config.compiler?.reactRemoveProperties,
              ],
              [
                'swcExperimentalDecorators',
                !!jsConfig?.compilerOptions?.experimentalDecorators,
              ],
              ['swcRemoveConsole', !!config.compiler?.removeConsole],
              ['swcImportSource', !!jsConfig?.compilerOptions?.jsxImportSource],
              ['swcEmotion', !!config.compiler?.emotion],
              ['turbotrace', !!config.experimental.turbotrace],
              ['transpilePackages', !!config.transpilePackages],
              [
                'skipMiddlewareUrlNormalize',
                !!config.skipMiddlewareUrlNormalize,
              ],
              ['skipTrailingSlashRedirect', !!config.skipTrailingSlashRedirect],
              ['modularizeImports', !!config.modularizeImports],
              SWCBinaryTarget,
            ].filter<[Feature, boolean]>(Boolean as any)
          )
        ),
    ].filter(Boolean as any as ExcludesFalse),
  }

  // Support tsconfig and jsconfig baseUrl
  if (resolvedBaseUrl) {
    webpackConfig.resolve?.modules?.push(resolvedBaseUrl)
  }

  // allows add JsConfigPathsPlugin to allow hot-reloading
  // if the config is added/removed
  webpackConfig.resolve?.plugins?.unshift(
    new JsConfigPathsPlugin(
      jsConfig?.compilerOptions?.paths || {},
      resolvedBaseUrl || dir
    )
  )

  const webpack5Config = webpackConfig as webpack.Configuration

  if (isEdgeServer) {
    webpack5Config.module?.rules?.unshift({
      test: /\.wasm$/,
      loader: 'next-middleware-wasm-loader',
      type: 'javascript/auto',
      resourceQuery: /module/i,
    })
    webpack5Config.module?.rules?.unshift({
      dependency: 'url',
      loader: 'next-middleware-asset-loader',
      type: 'javascript/auto',
      layer: WEBPACK_LAYERS.edgeAsset,
    })
    webpack5Config.module?.rules?.unshift({
      issuerLayer: WEBPACK_LAYERS.edgeAsset,
      type: 'asset/source',
    })
  }

  webpack5Config.experiments = {
    layers: true,
    cacheUnaffected: true,
    buildHttp: Array.isArray(config.experimental.urlImports)
      ? {
          allowedUris: config.experimental.urlImports,
          cacheLocation: path.join(dir, 'next.lock/data'),
          lockfileLocation: path.join(dir, 'next.lock/lock.json'),
        }
      : config.experimental.urlImports
      ? {
          cacheLocation: path.join(dir, 'next.lock/data'),
          lockfileLocation: path.join(dir, 'next.lock/lock.json'),
          ...config.experimental.urlImports,
        }
      : undefined,
  }

  webpack5Config.module!.parser = {
    javascript: {
      url: 'relative',
    },
  }
  webpack5Config.module!.generator = {
    asset: {
      filename: 'static/media/[name].[hash:8][ext]',
    },
  }

  if (!webpack5Config.output) {
    webpack5Config.output = {}
  }
  if (isClient) {
    webpack5Config.output.trustedTypes = 'nextjs#bundler'
  }

  if (isClient || isEdgeServer) {
    webpack5Config.output.enabledLibraryTypes = ['assign']
  }

  // This enables managedPaths for all node_modules
  // and also for the unplugged folder when using yarn pnp
  // It also add the yarn cache to the immutable paths
  webpack5Config.snapshot = {}
  if (process.versions.pnp === '3') {
    webpack5Config.snapshot.managedPaths = [
      /^(.+?(?:[\\/]\.yarn[\\/]unplugged[\\/][^\\/]+)?[\\/]node_modules[\\/])/,
    ]
  } else {
    webpack5Config.snapshot.managedPaths = [/^(.+?[\\/]node_modules[\\/])/]
  }
  if (process.versions.pnp === '3') {
    webpack5Config.snapshot.immutablePaths = [
      /^(.+?[\\/]cache[\\/][^\\/]+\.zip[\\/]node_modules[\\/])/,
    ]
  }

  if (dev) {
    if (!webpack5Config.optimization) {
      webpack5Config.optimization = {}
    }

    // For Server Components, it's necessary to have provided exports collected
    // to generate the correct flight manifest.
    if (!hasServerComponents) {
      webpack5Config.optimization.providedExports = false
    }
    webpack5Config.optimization.usedExports = false
  }

  const configVars = JSON.stringify({
    crossOrigin: config.crossOrigin,
    pageExtensions: pageExtensions,
    trailingSlash: config.trailingSlash,
    buildActivity: config.devIndicators.buildActivity,
    buildActivityPosition: config.devIndicators.buildActivityPosition,
    productionBrowserSourceMaps: !!config.productionBrowserSourceMaps,
    reactStrictMode: config.reactStrictMode,
    optimizeFonts: config.optimizeFonts,
    optimizeCss: config.experimental.optimizeCss,
    nextScriptWorkers: config.experimental.nextScriptWorkers,
    scrollRestoration: config.experimental.scrollRestoration,
    serverActions: config.experimental.serverActions,
    typedRoutes: config.experimental.typedRoutes,
    basePath: config.basePath,
    excludeDefaultMomentLocales: config.excludeDefaultMomentLocales,
    assetPrefix: config.assetPrefix,
    disableOptimizedLoading,
    isEdgeRuntime: isEdgeServer,
    reactProductionProfiling,
    webpack: !!config.webpack,
    hasRewrites,
    swcMinify: config.swcMinify,
    swcLoader: useSWCLoader,
    removeConsole: config.compiler?.removeConsole,
    reactRemoveProperties: config.compiler?.reactRemoveProperties,
    styledComponents: config.compiler?.styledComponents,
    relay: config.compiler?.relay,
    emotion: config.compiler?.emotion,
    modularizeImports: config.modularizeImports,
    imageLoaderFile: config.images.loaderFile,
  })

  const cache: any = {
    type: 'filesystem',
    // Disable memory cache in development in favor of our own MemoryWithGcCachePlugin.
    maxMemoryGenerations: dev ? 0 : Infinity, // Infinity is default value for production in webpack currently.
    // Includes:
    //  - Next.js version
    //  - next.config.js keys that affect compilation
    version: `${process.env.__NEXT_VERSION}|${configVars}`,
    cacheDirectory: path.join(distDir, 'cache', 'webpack'),
    // For production builds, it's more efficient to compress all cache files together instead of compression each one individually.
    // So we disable compression here and allow the build runner to take care of compressing the cache as a whole.
    // For local development, we still want to compress the cache files individually to avoid I/O bottlenecks
    // as we are seeing 1~10 seconds of fs I/O time from user reports.
    compression: dev ? 'gzip' : false,
  }

  // Adds `next.config.js` as a buildDependency when custom webpack config is provided
  if (config.webpack && config.configFile) {
    cache.buildDependencies = {
      config: [config.configFile],
    }
  }

  webpack5Config.cache = cache

  if (process.env.NEXT_WEBPACK_LOGGING) {
    const infra = process.env.NEXT_WEBPACK_LOGGING.includes('infrastructure')
    const profileClient =
      process.env.NEXT_WEBPACK_LOGGING.includes('profile-client')
    const profileServer =
      process.env.NEXT_WEBPACK_LOGGING.includes('profile-server')
    const summaryClient =
      process.env.NEXT_WEBPACK_LOGGING.includes('summary-client')
    const summaryServer =
      process.env.NEXT_WEBPACK_LOGGING.includes('summary-server')

    const profile =
      (profileClient && isClient) || (profileServer && isNodeOrEdgeCompilation)
    const summary =
      (summaryClient && isClient) || (summaryServer && isNodeOrEdgeCompilation)

    const logDefault = !infra && !profile && !summary

    if (logDefault || infra) {
      webpack5Config.infrastructureLogging = {
        level: 'verbose',
        debug: /FileSystemInfo/,
      }
    }

    if (logDefault || profile) {
      webpack5Config.plugins!.push((compiler: webpack.Compiler) => {
        compiler.hooks.done.tap('next-webpack-logging', (stats) => {
          console.log(
            stats.toString({
              colors: true,
              logging: logDefault ? 'log' : 'verbose',
            })
          )
        })
      })
    } else if (summary) {
      webpack5Config.plugins!.push((compiler: webpack.Compiler) => {
        compiler.hooks.done.tap('next-webpack-logging', (stats) => {
          console.log(
            stats.toString({
              preset: 'summary',
              colors: true,
              timings: true,
            })
          )
        })
      })
    }

    if (profile) {
      const ProgressPlugin =
        webpack.ProgressPlugin as unknown as typeof webpack.ProgressPlugin
      webpack5Config.plugins!.push(
        new ProgressPlugin({
          profile: true,
        })
      )
      webpack5Config.profile = true
    }
  }

  webpackConfig = await buildConfiguration(webpackConfig, {
    supportedBrowsers,
    rootDirectory: dir,
    customAppFile: pagesDir
      ? new RegExp(escapeStringRegexp(path.join(pagesDir, `_app`)))
      : undefined,
    hasAppDir,
    isDevelopment: dev,
    isServer: isNodeOrEdgeCompilation,
    isEdgeRuntime: isEdgeServer,
    targetWeb: isClient || isEdgeServer,
    assetPrefix: config.assetPrefix || '',
    sassOptions: config.sassOptions,
    productionBrowserSourceMaps: config.productionBrowserSourceMaps,
    future: config.future,
    experimental: config.experimental,
    disableStaticImages: config.images.disableStaticImages,
    transpilePackages: config.transpilePackages,
    serverSourceMaps: config.experimental.serverSourceMaps,
  })

  // @ts-ignore Cache exists
  webpackConfig.cache.name = `${webpackConfig.name}-${webpackConfig.mode}${
    isDevFallback ? '-fallback' : ''
  }`

  if (dev) {
    if (webpackConfig.module) {
      webpackConfig.module.unsafeCache = (module: any) =>
        !UNSAFE_CACHE_REGEX.test(module.resource)
    } else {
      webpackConfig.module = {
        unsafeCache: (module: any) => !UNSAFE_CACHE_REGEX.test(module.resource),
      }
    }
  }

  let originalDevtool = webpackConfig.devtool
  if (typeof config.webpack === 'function') {
    webpackConfig = config.webpack(webpackConfig, {
      dir,
      dev,
      isServer: isNodeOrEdgeCompilation,
      buildId,
      config,
      defaultLoaders,
      totalPages: Object.keys(entrypoints).length,
      webpack,
      ...(isNodeOrEdgeCompilation
        ? {
            nextRuntime: isEdgeServer ? 'edge' : 'nodejs',
          }
        : {}),
    })

    if (!webpackConfig) {
      throw new Error(
        `Webpack config is undefined. You may have forgot to return properly from within the "webpack" method of your ${config.configFileName}.\n` +
          'See more info here https://nextjs.org/docs/messages/undefined-webpack-config'
      )
    }

    if (dev && originalDevtool !== webpackConfig.devtool) {
      webpackConfig.devtool = originalDevtool
      devtoolRevertWarning(originalDevtool)
    }

    // eslint-disable-next-line @typescript-eslint/no-shadow
    const webpack5Config = webpackConfig as webpack.Configuration

    // disable lazy compilation of entries as next.js has it's own method here
    if (webpack5Config.experiments?.lazyCompilation === true) {
      webpack5Config.experiments.lazyCompilation = {
        entries: false,
      }
    } else if (
      typeof webpack5Config.experiments?.lazyCompilation === 'object' &&
      webpack5Config.experiments.lazyCompilation.entries !== false
    ) {
      webpack5Config.experiments.lazyCompilation.entries = false
    }

    if (typeof (webpackConfig as any).then === 'function') {
      console.warn(
        '> Promise returned in next config. https://nextjs.org/docs/messages/promise-in-next-config'
      )
    }
  }

  if (!config.images.disableStaticImages) {
    const rules = webpackConfig.module?.rules || []
    const hasCustomSvg = rules.some(
      (rule) =>
        rule &&
        typeof rule === 'object' &&
        rule.loader !== 'next-image-loader' &&
        'test' in rule &&
        rule.test instanceof RegExp &&
        rule.test.test('.svg')
    )
    const nextImageRule = rules.find(
      (rule) =>
        rule && typeof rule === 'object' && rule.loader === 'next-image-loader'
    )
    if (
      hasCustomSvg &&
      nextImageRule &&
      nextImageRule &&
      typeof nextImageRule === 'object'
    ) {
      // Exclude svg if the user already defined it in custom
      // webpack config such as `@svgr/webpack` plugin or
      // the `babel-plugin-inline-react-svg` plugin.
      nextImageRule.test = /\.(png|jpg|jpeg|gif|webp|avif|ico|bmp)$/i
    }
  }

  if (
    config.experimental.craCompat &&
    webpackConfig.module?.rules &&
    webpackConfig.plugins
  ) {
    // CRA allows importing non-webpack handled files with file-loader
    // these need to be the last rule to prevent catching other items
    // https://github.com/facebook/create-react-app/blob/fddce8a9e21bf68f37054586deb0c8636a45f50b/packages/react-scripts/config/webpack.config.js#L594
    const fileLoaderExclude = [/\.(js|mjs|jsx|ts|tsx|json)$/]
    const fileLoader = {
      exclude: fileLoaderExclude,
      issuer: fileLoaderExclude,
      type: 'asset/resource',
    }

    const topRules = []
    const innerRules = []

    for (const rule of webpackConfig.module.rules) {
      if (!rule || typeof rule !== 'object') continue
      if (rule.resolve) {
        topRules.push(rule)
      } else {
        if (
          rule.oneOf &&
          !(rule.test || rule.exclude || rule.resource || rule.issuer)
        ) {
          rule.oneOf.forEach((r) => innerRules.push(r))
        } else {
          innerRules.push(rule)
        }
      }
    }

    webpackConfig.module.rules = [
      ...(topRules as any),
      {
        oneOf: [...innerRules, fileLoader],
      },
    ]
  }

  // Backwards compat with webpack-dev-middleware options object
  if (typeof config.webpackDevMiddleware === 'function') {
    const options = config.webpackDevMiddleware({
      watchOptions: webpackConfig.watchOptions,
    })
    if (options.watchOptions) {
      webpackConfig.watchOptions = options.watchOptions
    }
  }

  function canMatchCss(rule: webpack.RuleSetCondition | undefined): boolean {
    if (!rule) {
      return false
    }

    const fileNames = [
      '/tmp/NEXTJS_CSS_DETECTION_FILE.css',
      '/tmp/NEXTJS_CSS_DETECTION_FILE.scss',
      '/tmp/NEXTJS_CSS_DETECTION_FILE.sass',
      '/tmp/NEXTJS_CSS_DETECTION_FILE.less',
      '/tmp/NEXTJS_CSS_DETECTION_FILE.styl',
    ]

    if (rule instanceof RegExp && fileNames.some((input) => rule.test(input))) {
      return true
    }

    if (typeof rule === 'function') {
      if (
        fileNames.some((input) => {
          try {
            if (rule(input)) {
              return true
            }
          } catch {}
          return false
        })
      ) {
        return true
      }
    }

    if (Array.isArray(rule) && rule.some(canMatchCss)) {
      return true
    }

    return false
  }

  const hasUserCssConfig =
    webpackConfig.module?.rules?.some(
      (rule: any) => canMatchCss(rule.test) || canMatchCss(rule.include)
    ) ?? false

  if (hasUserCssConfig) {
    // only show warning for one build
    if (isNodeOrEdgeCompilation) {
      console.warn(
        chalk.yellow.bold('Warning: ') +
          chalk.bold(
            'Built-in CSS support is being disabled due to custom CSS configuration being detected.\n'
          ) +
          'See here for more info: https://nextjs.org/docs/messages/built-in-css-disabled\n'
      )
    }

    if (webpackConfig.module?.rules?.length) {
      // Remove default CSS Loaders
      webpackConfig.module.rules.forEach((r) => {
        if (!r || typeof r !== 'object') return
        if (Array.isArray(r.oneOf)) {
          r.oneOf = r.oneOf.filter(
            (o) => (o as any)[Symbol.for('__next_css_remove')] !== true
          )
        }
      })
    }
    if (webpackConfig.plugins?.length) {
      // Disable CSS Extraction Plugin
      webpackConfig.plugins = webpackConfig.plugins.filter(
        (p) => (p as any).__next_css_remove !== true
      )
    }
    if (webpackConfig.optimization?.minimizer?.length) {
      // Disable CSS Minifier
      webpackConfig.optimization.minimizer =
        webpackConfig.optimization.minimizer.filter(
          (e) => (e as any).__next_css_remove !== true
        )
    }
  }

  // Inject missing React Refresh loaders so that development mode is fast:
  if (dev && isClient) {
    attachReactRefresh(webpackConfig, defaultLoaders.babel)
  }

  // check if using @zeit/next-typescript and show warning
  if (
    isNodeOrEdgeCompilation &&
    webpackConfig.module &&
    Array.isArray(webpackConfig.module.rules)
  ) {
    let foundTsRule = false

    webpackConfig.module.rules = webpackConfig.module.rules.filter(
      (rule): boolean => {
        if (!rule || typeof rule !== 'object') return true
        if (!(rule.test instanceof RegExp)) return true
        if (rule.test.test('noop.ts') && !rule.test.test('noop.js')) {
          // remove if it matches @zeit/next-typescript
          foundTsRule = rule.use === defaultLoaders.babel
          return !foundTsRule
        }
        return true
      }
    )

    if (foundTsRule) {
      console.warn(
        `\n@zeit/next-typescript is no longer needed since Next.js has built-in support for TypeScript now. Please remove it from your ${config.configFileName} and your .babelrc\n`
      )
    }
  }

  // Backwards compat for `main.js` entry key
  // and setup of dependencies between entries
  // we can't do that in the initial entry for
  // backward-compat reasons
  const originalEntry: any = webpackConfig.entry
  if (typeof originalEntry !== 'undefined') {
    const updatedEntry = async () => {
      const entry: webpack.EntryObject =
        typeof originalEntry === 'function'
          ? await originalEntry()
          : originalEntry
      // Server compilation doesn't have main.js
      if (
        clientEntries &&
        Array.isArray(entry['main.js']) &&
        entry['main.js'].length > 0
      ) {
        const originalFile = clientEntries[
          CLIENT_STATIC_FILES_RUNTIME_MAIN
        ] as string
        entry[CLIENT_STATIC_FILES_RUNTIME_MAIN] = [
          ...entry['main.js'],
          originalFile,
        ]
      }
      delete entry['main.js']

      for (const name of Object.keys(entry)) {
        entry[name] = finalizeEntrypoint({
          value: entry[name],
          compilerType,
          name,
          hasAppDir,
        })
      }

      return entry
    }
    // @ts-ignore webpack 5 typings needed
    webpackConfig.entry = updatedEntry
  }

  if (!dev && typeof webpackConfig.entry === 'function') {
    // entry is always a function
    webpackConfig.entry = await webpackConfig.entry()
  }

  return webpackConfig
}