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next-dev-server.ts
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next-dev-server.ts
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import type { CustomRoutes } from '../../lib/load-custom-routes'
import type { FindComponentsResult } from '../next-server'
import type { LoadComponentsReturnType } from '../load-components'
import type { Options as ServerOptions } from '../next-server'
import type { Params } from '../../shared/lib/router/utils/route-matcher'
import type { ParsedUrl } from '../../shared/lib/router/utils/parse-url'
import type { ParsedUrlQuery } from 'querystring'
import type { Server as HTTPServer } from 'http'
import type { UrlWithParsedQuery } from 'url'
import type { BaseNextRequest, BaseNextResponse } from '../base-http'
import type { MiddlewareRoutingItem, RoutingItem } from '../base-server'
import type { MiddlewareMatcher } from '../../build/analysis/get-page-static-info'
import type { FunctionComponent } from 'react'
import type { RouteMatch } from '../future/route-matches/route-match'
import fs from 'fs'
import { Worker } from 'next/dist/compiled/jest-worker'
import findUp from 'next/dist/compiled/find-up'
import { join as pathJoin, relative, resolve as pathResolve, sep } from 'path'
import Watchpack from 'next/dist/compiled/watchpack'
import { ampValidation } from '../../build/output'
import {
INSTRUMENTATION_HOOK_FILENAME,
PUBLIC_DIR_MIDDLEWARE_CONFLICT,
} from '../../lib/constants'
import { fileExists } from '../../lib/file-exists'
import { findPagesDir } from '../../lib/find-pages-dir'
import loadCustomRoutes from '../../lib/load-custom-routes'
import { verifyTypeScriptSetup } from '../../lib/verifyTypeScriptSetup'
import { verifyPartytownSetup } from '../../lib/verify-partytown-setup'
import {
PHASE_DEVELOPMENT_SERVER,
CLIENT_STATIC_FILES_PATH,
DEV_CLIENT_PAGES_MANIFEST,
DEV_MIDDLEWARE_MANIFEST,
COMPILER_NAMES,
PAGES_MANIFEST,
APP_PATHS_MANIFEST,
} from '../../shared/lib/constants'
import Server, { WrappedBuildError } from '../next-server'
import { getRouteMatcher } from '../../shared/lib/router/utils/route-matcher'
import { getMiddlewareRouteMatcher } from '../../shared/lib/router/utils/middleware-route-matcher'
import { normalizePagePath } from '../../shared/lib/page-path/normalize-page-path'
import { absolutePathToPage } from '../../shared/lib/page-path/absolute-path-to-page'
import Router from '../router'
import { getPathMatch } from '../../shared/lib/router/utils/path-match'
import { pathHasPrefix } from '../../shared/lib/router/utils/path-has-prefix'
import { removePathPrefix } from '../../shared/lib/router/utils/remove-path-prefix'
import { eventCliSession } from '../../telemetry/events'
import { Telemetry } from '../../telemetry/storage'
import { setGlobal } from '../../trace'
import HotReloader from './hot-reloader'
import { createValidFileMatcher, findPageFile } from '../lib/find-page-file'
import { getNodeOptionsWithoutInspect } from '../lib/utils'
import {
UnwrapPromise,
withCoalescedInvoke,
} from '../../lib/coalesced-function'
import { loadDefaultErrorComponents } from '../load-components'
import { DecodeError, MiddlewareNotFoundError } from '../../shared/lib/utils'
import {
createOriginalStackFrame,
getErrorSource,
getSourceById,
parseStack,
} from 'next/dist/compiled/@next/react-dev-overlay/dist/middleware'
import * as Log from '../../build/output/log'
import isError, { getProperError } from '../../lib/is-error'
import { getRouteRegex } from '../../shared/lib/router/utils/route-regex'
import { getSortedRoutes } from '../../shared/lib/router/utils'
import {
getStaticInfoIncludingLayouts,
runDependingOnPageType,
} from '../../build/entries'
import { NodeNextResponse, NodeNextRequest } from '../base-http/node'
import { normalizePathSep } from '../../shared/lib/page-path/normalize-path-sep'
import { normalizeAppPath } from '../../shared/lib/router/utils/app-paths'
import {
getPossibleInstrumentationHookFilenames,
getPossibleMiddlewareFilenames,
isInstrumentationHookFile,
isMiddlewareFile,
NestedMiddlewareError,
} from '../../build/utils'
import { getDefineEnv } from '../../build/webpack-config'
import loadJsConfig from '../../build/load-jsconfig'
import { formatServerError } from '../../lib/format-server-error'
import { devPageFiles } from '../../build/webpack/plugins/next-types-plugin'
import {
DevRouteMatcherManager,
RouteEnsurer,
} from '../future/route-matcher-managers/dev-route-matcher-manager'
import { DevPagesRouteMatcherProvider } from '../future/route-matcher-providers/dev/dev-pages-route-matcher-provider'
import { DevPagesAPIRouteMatcherProvider } from '../future/route-matcher-providers/dev/dev-pages-api-route-matcher-provider'
import { DevAppPageRouteMatcherProvider } from '../future/route-matcher-providers/dev/dev-app-page-route-matcher-provider'
import { DevAppRouteRouteMatcherProvider } from '../future/route-matcher-providers/dev/dev-app-route-route-matcher-provider'
import { PagesManifest } from '../../build/webpack/plugins/pages-manifest-plugin'
import { NodeManifestLoader } from '../future/route-matcher-providers/helpers/manifest-loaders/node-manifest-loader'
import { CachedFileReader } from '../future/route-matcher-providers/dev/helpers/file-reader/cached-file-reader'
import { DefaultFileReader } from '../future/route-matcher-providers/dev/helpers/file-reader/default-file-reader'
import { NextBuildContext } from '../../build/build-context'
import { logAppDirError } from './log-app-dir-error'
import { createClientRouterFilter } from '../../lib/create-client-router-filter'
import { IncrementalCache } from '../lib/incremental-cache'
import LRUCache from 'next/dist/compiled/lru-cache'
import { NextUrlWithParsedQuery } from '../request-meta'
import { deserializeErr, errorToJSON } from '../render'
import { invokeRequest } from '../lib/server-ipc/invoke-request'
import { generateInterceptionRoutesRewrites } from '../../lib/generate-interception-routes-rewrites'
// Load ReactDevOverlay only when needed
let ReactDevOverlayImpl: FunctionComponent
const ReactDevOverlay = (props: any) => {
if (ReactDevOverlayImpl === undefined) {
ReactDevOverlayImpl =
require('next/dist/compiled/@next/react-dev-overlay/dist/client').ReactDevOverlay
}
return ReactDevOverlayImpl(props)
}
export interface Options extends ServerOptions {
/**
* Tells of Next.js is running from the `next dev` command
*/
isNextDevCommand?: boolean
}
export default class DevServer extends Server {
private devReady: Promise<void>
private setDevReady?: Function
private webpackWatcher?: Watchpack | null
private hotReloader?: HotReloader
private isCustomServer: boolean
protected sortedRoutes?: string[]
private addedUpgradeListener = false
private pagesDir?: string
private appDir?: string
private actualMiddlewareFile?: string
private actualInstrumentationHookFile?: string
private middleware?: MiddlewareRoutingItem
private edgeFunctions?: RoutingItem[]
private verifyingTypeScript?: boolean
private usingTypeScript?: boolean
private originalFetch: typeof fetch
private staticPathsCache: LRUCache<
string,
UnwrapPromise<ReturnType<DevServer['getStaticPaths']>>
>
protected staticPathsWorker?: { [key: string]: any } & {
loadStaticPaths: typeof import('./static-paths-worker').loadStaticPaths
}
private getStaticPathsWorker(): { [key: string]: any } & {
loadStaticPaths: typeof import('./static-paths-worker').loadStaticPaths
} {
const worker = new Worker(require.resolve('./static-paths-worker'), {
maxRetries: 1,
// For dev server, it's not necessary to spin up too many workers as long as you are not doing a load test.
// This helps reusing the memory a lot.
numWorkers: 1,
enableWorkerThreads: this.nextConfig.experimental.workerThreads,
forkOptions: {
env: {
...process.env,
// discard --inspect/--inspect-brk flags from process.env.NODE_OPTIONS. Otherwise multiple Node.js debuggers
// would be started if user launch Next.js in debugging mode. The number of debuggers is linked to
// the number of workers Next.js tries to launch. The only worker users are interested in debugging
// is the main Next.js one
NODE_OPTIONS: getNodeOptionsWithoutInspect(),
},
},
}) as Worker & {
loadStaticPaths: typeof import('./static-paths-worker').loadStaticPaths
}
worker.getStdout().pipe(process.stdout)
worker.getStderr().pipe(process.stderr)
return worker
}
constructor(options: Options) {
try {
// Increase the number of stack frames on the server
Error.stackTraceLimit = 50
} catch {}
super({ ...options, dev: true })
this.originalFetch = global.fetch
this.renderOpts.dev = true
this.renderOpts.appDirDevErrorLogger = (err: any) =>
this.logErrorWithOriginalStack(err, 'app-dir')
;(this.renderOpts as any).ErrorDebug = ReactDevOverlay
this.devReady = new Promise((resolve) => {
this.setDevReady = resolve
})
this.staticPathsCache = new LRUCache({
// 5MB
max: 5 * 1024 * 1024,
length(value) {
return JSON.stringify(value.staticPaths).length
},
})
;(this.renderOpts as any).ampSkipValidation =
this.nextConfig.experimental?.amp?.skipValidation ?? false
;(this.renderOpts as any).ampValidator = (
html: string,
pathname: string
) => {
const validatorPath =
this.nextConfig.experimental &&
this.nextConfig.experimental.amp &&
this.nextConfig.experimental.amp.validator
const AmpHtmlValidator =
require('next/dist/compiled/amphtml-validator') as typeof import('next/dist/compiled/amphtml-validator')
return AmpHtmlValidator.getInstance(validatorPath).then((validator) => {
const result = validator.validateString(html)
ampValidation(
pathname,
result.errors
.filter((e) => e.severity === 'ERROR')
.filter((e) => this._filterAmpDevelopmentScript(html, e)),
result.errors.filter((e) => e.severity !== 'ERROR')
)
})
}
if (fs.existsSync(pathJoin(this.dir, 'static'))) {
Log.warn(
`The static directory has been deprecated in favor of the public directory. https://nextjs.org/docs/messages/static-dir-deprecated`
)
}
// setup upgrade listener eagerly when we can otherwise
// it will be done on the first request via req.socket.server
if (options.httpServer) {
this.setupWebSocketHandler(options.httpServer)
}
this.isCustomServer = !options.isNextDevCommand
const { pagesDir, appDir } = findPagesDir(
this.dir,
!!this.nextConfig.experimental.appDir
)
this.pagesDir = pagesDir
this.appDir = appDir
}
protected getRoutes() {
const { pagesDir, appDir } = findPagesDir(
this.dir,
!!this.nextConfig.experimental.appDir
)
const ensurer: RouteEnsurer = {
ensure: async (match) => {
await this.ensurePage({
match,
page: match.definition.page,
clientOnly: false,
})
},
}
const routes = super.getRoutes()
const matchers = new DevRouteMatcherManager(
routes.matchers,
ensurer,
this.dir
)
const handlers = routes.handlers
const extensions = this.nextConfig.pageExtensions
const fileReader = new CachedFileReader(new DefaultFileReader())
// If the pages directory is available, then configure those matchers.
if (pagesDir) {
matchers.push(
new DevPagesRouteMatcherProvider(
pagesDir,
extensions,
fileReader,
this.localeNormalizer
)
)
matchers.push(
new DevPagesAPIRouteMatcherProvider(
pagesDir,
extensions,
fileReader,
this.localeNormalizer
)
)
}
if (appDir) {
matchers.push(
new DevAppPageRouteMatcherProvider(appDir, extensions, fileReader)
)
matchers.push(
new DevAppRouteRouteMatcherProvider(appDir, extensions, fileReader)
)
}
return { matchers, handlers }
}
protected getBuildId(): string {
return 'development'
}
async addExportPathMapRoutes() {
// Makes `next export` exportPathMap work in development mode.
// So that the user doesn't have to define a custom server reading the exportPathMap
if (this.nextConfig.exportPathMap) {
Log.info('Defining routes from exportPathMap')
const exportPathMap = await this.nextConfig.exportPathMap(
{},
{
dev: true,
dir: this.dir,
outDir: null,
distDir: this.distDir,
buildId: this.buildId,
}
)
// In development we can't give a default path mapping
for (const path in exportPathMap) {
const { page, query = {} } = exportPathMap[path]
this.router.addFsRoute({
match: getPathMatch(path),
type: 'route',
name: `${path} exportpathmap route`,
fn: async (req, res, _params, parsedUrl) => {
const { query: urlQuery } = parsedUrl
Object.keys(urlQuery)
.filter((key) => query[key] === undefined)
.forEach((key) =>
Log.warn(
`Url '${path}' defines a query parameter '${key}' that is missing in exportPathMap`
)
)
const mergedQuery = { ...urlQuery, ...query }
await this.render(req, res, page, mergedQuery, parsedUrl, true)
return {
finished: true,
}
},
})
}
}
}
async startWatcher(): Promise<void> {
if (this.webpackWatcher) {
return
}
const validFileMatcher = createValidFileMatcher(
this.nextConfig.pageExtensions,
this.appDir
)
let resolved = false
return new Promise(async (resolve, reject) => {
if (this.pagesDir) {
// Watchpack doesn't emit an event for an empty directory
fs.readdir(this.pagesDir, (_, files) => {
if (files?.length) {
return
}
if (!resolved) {
resolve()
resolved = true
}
})
}
const pages = this.pagesDir ? [this.pagesDir] : []
const app = this.appDir ? [this.appDir] : []
const directories = [...pages, ...app]
const rootDir = this.pagesDir || this.appDir
const files = [
...getPossibleMiddlewareFilenames(
pathJoin(rootDir!, '..'),
this.nextConfig.pageExtensions
),
...getPossibleInstrumentationHookFilenames(
pathJoin(rootDir!, '..'),
this.nextConfig.pageExtensions
),
]
let nestedMiddleware: string[] = []
const envFiles = [
'.env.development.local',
'.env.local',
'.env.development',
'.env',
].map((file) => pathJoin(this.dir, file))
files.push(...envFiles)
// tsconfig/jsconfig paths hot-reloading
const tsconfigPaths = [
pathJoin(this.dir, 'tsconfig.json'),
pathJoin(this.dir, 'jsconfig.json'),
]
files.push(...tsconfigPaths)
const wp = (this.webpackWatcher = new Watchpack({
ignored: (pathname: string) => {
return (
!files.some((file) => file.startsWith(pathname)) &&
!directories.some(
(dir) => pathname.startsWith(dir) || dir.startsWith(pathname)
)
)
},
}))
wp.watch({ directories: [this.dir], startTime: 0 })
const fileWatchTimes = new Map()
let enabledTypeScript = this.usingTypeScript
let previousClientRouterFilters: any
wp.on('aggregated', async () => {
let middlewareMatchers: MiddlewareMatcher[] | undefined
const routedPages: string[] = []
const knownFiles = wp.getTimeInfoEntries()
const appPaths: Record<string, string[]> = {}
const edgeRoutesSet = new Set<string>()
const pageNameSet = new Set<string>()
const conflictingAppPagePaths = new Set<string>()
const appPageFilePaths = new Map<string, string>()
const pagesPageFilePaths = new Map<string, string>()
let envChange = false
let tsconfigChange = false
devPageFiles.clear()
for (const [fileName, meta] of knownFiles) {
if (
!files.includes(fileName) &&
!directories.some((dir) => fileName.startsWith(dir))
) {
continue
}
const watchTime = fileWatchTimes.get(fileName)
const watchTimeChange = watchTime && watchTime !== meta?.timestamp
fileWatchTimes.set(fileName, meta.timestamp)
if (envFiles.includes(fileName)) {
if (watchTimeChange) {
envChange = true
}
continue
}
if (tsconfigPaths.includes(fileName)) {
if (fileName.endsWith('tsconfig.json')) {
enabledTypeScript = true
}
if (watchTimeChange) {
tsconfigChange = true
}
continue
}
if (
meta?.accuracy === undefined ||
!validFileMatcher.isPageFile(fileName)
) {
continue
}
const isAppPath = Boolean(
this.appDir &&
normalizePathSep(fileName).startsWith(
normalizePathSep(this.appDir)
)
)
devPageFiles.add(fileName)
const rootFile = absolutePathToPage(fileName, {
dir: this.dir,
extensions: this.nextConfig.pageExtensions,
keepIndex: false,
pagesType: 'root',
})
const staticInfo = await getStaticInfoIncludingLayouts({
pageFilePath: fileName,
config: this.nextConfig,
appDir: this.appDir,
page: rootFile,
isDev: true,
isInsideAppDir: isAppPath,
pageExtensions: this.nextConfig.pageExtensions,
})
if (isMiddlewareFile(rootFile)) {
if (this.nextConfig.output === 'export') {
Log.error(
'Middleware cannot be used with "output: export". See more info here: https://nextjs.org/docs/advanced-features/static-html-export'
)
continue
}
this.actualMiddlewareFile = rootFile
middlewareMatchers = staticInfo.middleware?.matchers || [
{ regexp: '.*', originalSource: '/:path*' },
]
continue
}
if (
isInstrumentationHookFile(rootFile) &&
this.nextConfig.experimental.instrumentationHook
) {
this.actualInstrumentationHookFile = rootFile
continue
}
if (fileName.endsWith('.ts') || fileName.endsWith('.tsx')) {
enabledTypeScript = true
}
let pageName = absolutePathToPage(fileName, {
dir: isAppPath ? this.appDir! : this.pagesDir!,
extensions: this.nextConfig.pageExtensions,
keepIndex: isAppPath,
pagesType: isAppPath ? 'app' : 'pages',
})
if (
!isAppPath &&
pageName.startsWith('/api/') &&
this.nextConfig.output === 'export'
) {
Log.error(
'API Routes cannot be used with "output: export". See more info here: https://nextjs.org/docs/advanced-features/static-html-export'
)
continue
}
if (isAppPath) {
if (
!validFileMatcher.isAppRouterPage(fileName) &&
!validFileMatcher.isRootNotFound(fileName)
) {
continue
}
// Ignore files/directories starting with `_` in the app directory
if (normalizePathSep(pageName).includes('/_')) {
continue
}
const originalPageName = pageName
pageName = normalizeAppPath(pageName).replace(/%5F/g, '_')
if (!appPaths[pageName]) {
appPaths[pageName] = []
}
appPaths[pageName].push(originalPageName)
if (routedPages.includes(pageName)) {
continue
}
} else {
// /index is preserved for root folder
pageName = pageName.replace(/\/index$/, '') || '/'
}
;(isAppPath ? appPageFilePaths : pagesPageFilePaths).set(
pageName,
fileName
)
if (this.appDir && pageNameSet.has(pageName)) {
conflictingAppPagePaths.add(pageName)
} else {
pageNameSet.add(pageName)
}
/**
* If there is a middleware that is not declared in the root we will
* warn without adding it so it doesn't make its way into the system.
*/
if (/[\\\\/]_middleware$/.test(pageName)) {
nestedMiddleware.push(pageName)
continue
}
await runDependingOnPageType({
page: pageName,
pageRuntime: staticInfo.runtime,
onClient: () => {},
onServer: () => {
routedPages.push(pageName)
},
onEdgeServer: () => {
routedPages.push(pageName)
edgeRoutesSet.add(pageName)
},
})
}
const numConflicting = conflictingAppPagePaths.size
if (numConflicting > 0) {
Log.error(
`Conflicting app and page file${
numConflicting === 1 ? ' was' : 's were'
} found, please remove the conflicting files to continue:`
)
for (const p of conflictingAppPagePaths) {
const appPath = relative(this.dir, appPageFilePaths.get(p)!)
const pagesPath = relative(this.dir, pagesPageFilePaths.get(p)!)
Log.error(` "${pagesPath}" - "${appPath}"`)
}
}
let clientRouterFilters: any
if (this.nextConfig.experimental.clientRouterFilter) {
clientRouterFilters = createClientRouterFilter(
Object.keys(appPaths),
this.nextConfig.experimental.clientRouterFilterRedirects
? ((this.nextConfig as any)._originalRedirects || []).filter(
(r: any) => !r.internal
)
: [],
this.nextConfig.experimental.clientRouterFilterAllowedRate
)
if (
!previousClientRouterFilters ||
JSON.stringify(previousClientRouterFilters) !==
JSON.stringify(clientRouterFilters)
) {
envChange = true
previousClientRouterFilters = clientRouterFilters
}
}
if (!this.usingTypeScript && enabledTypeScript) {
// we tolerate the error here as this is best effort
// and the manual install command will be shown
await this.verifyTypeScript()
.then(() => {
tsconfigChange = true
})
.catch(() => {})
}
if (envChange || tsconfigChange) {
if (envChange) {
this.loadEnvConfig({
dev: true,
forceReload: true,
silent: !!process.env.__NEXT_PRIVATE_RENDER_WORKER,
})
}
let tsconfigResult:
| UnwrapPromise<ReturnType<typeof loadJsConfig>>
| undefined
if (tsconfigChange) {
try {
tsconfigResult = await loadJsConfig(this.dir, this.nextConfig)
} catch (_) {
/* do we want to log if there are syntax errors in tsconfig while editing? */
}
}
this.hotReloader?.activeConfigs?.forEach((config, idx) => {
const isClient = idx === 0
const isNodeServer = idx === 1
const isEdgeServer = idx === 2
const hasRewrites =
this.customRoutes.rewrites.afterFiles.length > 0 ||
this.customRoutes.rewrites.beforeFiles.length > 0 ||
this.customRoutes.rewrites.fallback.length > 0
if (tsconfigChange) {
config.resolve?.plugins?.forEach((plugin: any) => {
// look for the JsConfigPathsPlugin and update with
// the latest paths/baseUrl config
if (plugin && plugin.jsConfigPlugin && tsconfigResult) {
const { resolvedBaseUrl, jsConfig } = tsconfigResult
const currentResolvedBaseUrl = plugin.resolvedBaseUrl
const resolvedUrlIndex = config.resolve?.modules?.findIndex(
(item) => item === currentResolvedBaseUrl
)
if (
resolvedBaseUrl &&
resolvedBaseUrl !== currentResolvedBaseUrl
) {
// remove old baseUrl and add new one
if (resolvedUrlIndex && resolvedUrlIndex > -1) {
config.resolve?.modules?.splice(resolvedUrlIndex, 1)
}
config.resolve?.modules?.push(resolvedBaseUrl)
}
if (jsConfig?.compilerOptions?.paths && resolvedBaseUrl) {
Object.keys(plugin.paths).forEach((key) => {
delete plugin.paths[key]
})
Object.assign(plugin.paths, jsConfig.compilerOptions.paths)
plugin.resolvedBaseUrl = resolvedBaseUrl
}
}
})
}
if (envChange) {
config.plugins?.forEach((plugin: any) => {
// we look for the DefinePlugin definitions so we can
// update them on the active compilers
if (
plugin &&
typeof plugin.definitions === 'object' &&
plugin.definitions.__NEXT_DEFINE_ENV
) {
const newDefine = getDefineEnv({
dev: true,
config: this.nextConfig,
distDir: this.distDir,
isClient,
hasRewrites,
isNodeServer,
isEdgeServer,
clientRouterFilters,
})
Object.keys(plugin.definitions).forEach((key) => {
if (!(key in newDefine)) {
delete plugin.definitions[key]
}
})
Object.assign(plugin.definitions, newDefine)
}
})
}
})
this.hotReloader?.invalidate()
}
if (nestedMiddleware.length > 0) {
Log.error(
new NestedMiddlewareError(
nestedMiddleware,
this.dir,
(this.pagesDir || this.appDir)!
).message
)
nestedMiddleware = []
}
// Make sure to sort parallel routes to make the result deterministic.
this.appPathRoutes = Object.fromEntries(
Object.entries(appPaths).map(([k, v]) => [k, v.sort()])
)
const edgeRoutes = Array.from(edgeRoutesSet)
this.edgeFunctions = getSortedRoutes(edgeRoutes).map((page) => {
const matchedAppPaths = this.getOriginalAppPaths(page)
if (Array.isArray(matchedAppPaths)) {
page = matchedAppPaths[0]
}
const edgeRegex = getRouteRegex(page)
return {
match: getRouteMatcher(edgeRegex),
page,
re: edgeRegex.re,
}
})
this.middleware = middlewareMatchers
? {
match: getMiddlewareRouteMatcher(middlewareMatchers),
page: '/',
matchers: middlewareMatchers,
}
: undefined
this.customRoutes = await loadCustomRoutes(this.nextConfig)
const { rewrites } = this.customRoutes
this.customRoutes.rewrites.beforeFiles.push(
...generateInterceptionRoutesRewrites(Object.keys(appPaths))
)
if (
rewrites.beforeFiles.length ||
rewrites.afterFiles.length ||
rewrites.fallback.length
) {
this.router.setRewrites(
this.generateRewrites({
restrictedRedirectPaths: [],
})
)
}
try {
// we serve a separate manifest with all pages for the client in
// dev mode so that we can match a page after a rewrite on the client
// before it has been built and is populated in the _buildManifest
const sortedRoutes = getSortedRoutes(routedPages)
this.dynamicRoutes = sortedRoutes
.map((page) => {
const regex = getRouteRegex(page)
return {
match: getRouteMatcher(regex),
page,
re: regex.re,
}
})
.filter(Boolean) as any
if (
!this.sortedRoutes?.every((val, idx) => val === sortedRoutes[idx])
) {
// emit the change so clients fetch the update
this.hotReloader?.send(undefined, { devPagesManifest: true })
}
this.sortedRoutes = sortedRoutes
this.router.setCatchallMiddleware(
this.generateCatchAllMiddlewareRoute(true)
)
if (!resolved) {
resolve()
resolved = true
}
} catch (e) {
if (!resolved) {
reject(e)
resolved = true
} else {
Log.warn('Failed to reload dynamic routes:', e)
}
} finally {
// Reload the matchers. The filesystem would have been written to,
// and the matchers need to re-scan it to update the router.
await this.matchers.reload()
}
})
})
}
async stopWatcher(): Promise<void> {
if (!this.webpackWatcher) {
return
}
this.webpackWatcher.close()
this.webpackWatcher = null
}
private async verifyTypeScript() {
if (this.verifyingTypeScript) {
return
}
try {
this.verifyingTypeScript = true
const verifyResult = await verifyTypeScriptSetup({
dir: this.dir,
distDir: this.nextConfig.distDir,
intentDirs: [this.pagesDir, this.appDir].filter(Boolean) as string[],
typeCheckPreflight: false,
tsconfigPath: this.nextConfig.typescript.tsconfigPath,
disableStaticImages: this.nextConfig.images.disableStaticImages,
hasAppDir: !!this.appDir,
hasPagesDir: !!this.pagesDir,
})
if (verifyResult.version) {
this.usingTypeScript = true
}
} finally {
this.verifyingTypeScript = false
}
}
protected async prepareImpl(): Promise<void> {
setGlobal('distDir', this.distDir)
setGlobal('phase', PHASE_DEVELOPMENT_SERVER)
await this.verifyTypeScript()
this.customRoutes = await loadCustomRoutes(this.nextConfig)
// reload router
const { redirects, rewrites, headers } = this.customRoutes
if (
rewrites.beforeFiles.length ||
rewrites.afterFiles.length ||
rewrites.fallback.length ||
redirects.length ||
headers.length
) {
this.router = new Router(this.generateRoutes(true))
}
const telemetry = new Telemetry({ distDir: this.distDir })
// router worker does not start webpack compilers
if (!this.isRenderWorker) {
this.hotReloader = new HotReloader(this.dir, {
pagesDir: this.pagesDir,
distDir: this.distDir,
config: this.nextConfig,
previewProps: this.getPrerenderManifest().preview,
buildId: this.buildId,
rewrites,
appDir: this.appDir,
telemetry,
})
}
await super.prepareImpl()
await this.addExportPathMapRoutes()
await this.hotReloader?.start()
await this.startWatcher()
await this.runInstrumentationHookIfAvailable()
await this.matchers.reload()
this.setDevReady!()
if (this.nextConfig.experimental.nextScriptWorkers) {
await verifyPartytownSetup(
this.dir,
pathJoin(this.distDir, CLIENT_STATIC_FILES_PATH)
)
}
// This is required by the tracing subsystem.
setGlobal('appDir', this.appDir)
setGlobal('pagesDir', this.pagesDir)
setGlobal('telemetry', telemetry)
const isSrcDir = relative(
this.dir,
this.pagesDir || this.appDir || ''
).startsWith('src')
if (!this.isRenderWorker) {
telemetry.record(
eventCliSession(this.distDir, this.nextConfig, {
webpackVersion: 5,
cliCommand: 'dev',
isSrcDir,
hasNowJson: !!(await findUp('now.json', { cwd: this.dir })),
isCustomServer: this.isCustomServer,
turboFlag: false,
pagesDir: !!this.pagesDir,
appDir: !!this.appDir,
})
)
}
process.on('unhandledRejection', (reason) => {
this.logErrorWithOriginalStack(reason, 'unhandledRejection').catch(
() => {}
)
})
process.on('uncaughtException', (err) => {
this.logErrorWithOriginalStack(err, 'uncaughtException').catch(() => {})
})
}
protected async close(): Promise<void> {
await this.stopWatcher()
if (this.hotReloader) {
await this.hotReloader.stop()
}
}
protected async hasPage(pathname: string): Promise<boolean> {
let normalizedPath: string
try {
normalizedPath = normalizePagePath(pathname)
} catch (err) {
console.error(err)
// if normalizing the page fails it means it isn't valid
// so it doesn't exist so don't throw and return false
// to ensure we return 404 instead of 500
return false
}
if (isMiddlewareFile(normalizedPath)) {