/
entries.ts
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/
entries.ts
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import chalk from 'chalk'
import { posix, join } from 'path'
import { stringify } from 'querystring'
import { API_ROUTE, DOT_NEXT_ALIAS, PAGES_DIR_ALIAS } from '../lib/constants'
import { MIDDLEWARE_ROUTE } from '../lib/constants'
import { __ApiPreviewProps } from '../server/api-utils'
import { isTargetLikeServerless } from '../server/config'
import { normalizePagePath } from '../server/normalize-page-path'
import { warn } from './output/log'
import { MiddlewareLoaderOptions } from './webpack/loaders/next-middleware-loader'
import { ClientPagesLoaderOptions } from './webpack/loaders/next-client-pages-loader'
import { ServerlessLoaderQuery } from './webpack/loaders/next-serverless-loader'
import { LoadedEnvFiles } from '@next/env'
import { NextConfigComplete } from '../server/config-shared'
import { isCustomErrorPage, isFlightPage, isReservedPage } from './utils'
import { ssrEntries } from './webpack/plugins/middleware-plugin'
import type { webpack5 } from 'next/dist/compiled/webpack/webpack'
import { MIDDLEWARE_SSR_RUNTIME_WEBPACK } from '../shared/lib/constants'
type ObjectValue<T> = T extends { [key: string]: infer V } ? V : never
export type PagesMapping = {
[page: string]: string
}
export function createPagesMapping(
pagePaths: string[],
extensions: string[],
isDev: boolean,
hasServerComponents: boolean
): PagesMapping {
const previousPages: PagesMapping = {}
const pages: PagesMapping = pagePaths.reduce(
(result: PagesMapping, pagePath): PagesMapping => {
let page = pagePath.replace(
new RegExp(`\\.+(${extensions.join('|')})$`),
''
)
if (hasServerComponents && /\.client$/.test(page)) {
// Assume that if there's a Client Component, that there is
// a matching Server Component that will map to the page.
return result
}
page = page.replace(/\\/g, '/').replace(/\/index$/, '')
const pageKey = page === '' ? '/' : page
if (pageKey in result) {
warn(
`Duplicate page detected. ${chalk.cyan(
join('pages', previousPages[pageKey])
)} and ${chalk.cyan(
join('pages', pagePath)
)} both resolve to ${chalk.cyan(pageKey)}.`
)
} else {
previousPages[pageKey] = pagePath
}
result[pageKey] = join(PAGES_DIR_ALIAS, pagePath).replace(/\\/g, '/')
return result
},
{}
)
// we alias these in development and allow webpack to
// allow falling back to the correct source file so
// that HMR can work properly when a file is added/removed
const documentPage = `_document${hasServerComponents ? '-web' : ''}`
if (isDev) {
pages['/_app'] = `${PAGES_DIR_ALIAS}/_app`
pages['/_error'] = `${PAGES_DIR_ALIAS}/_error`
pages['/_document'] = `${PAGES_DIR_ALIAS}/_document`
} else {
pages['/_app'] = pages['/_app'] || 'next/dist/pages/_app'
pages['/_error'] = pages['/_error'] || 'next/dist/pages/_error'
pages['/_document'] =
pages['/_document'] || `next/dist/pages/${documentPage}`
}
return pages
}
type Entrypoints = {
client: webpack5.EntryObject
server: webpack5.EntryObject
serverWeb: webpack5.EntryObject
}
export function createEntrypoints(
pages: PagesMapping,
target: 'server' | 'serverless' | 'experimental-serverless-trace',
buildId: string,
previewMode: __ApiPreviewProps,
config: NextConfigComplete,
loadedEnvFiles: LoadedEnvFiles
): Entrypoints {
const client: webpack5.EntryObject = {}
const server: webpack5.EntryObject = {}
const serverWeb: webpack5.EntryObject = {}
const hasRuntimeConfig =
Object.keys(config.publicRuntimeConfig).length > 0 ||
Object.keys(config.serverRuntimeConfig).length > 0
const defaultServerlessOptions = {
absoluteAppPath: pages['/_app'],
absoluteDocumentPath: pages['/_document'],
absoluteErrorPath: pages['/_error'],
absolute404Path: pages['/404'] || '',
distDir: DOT_NEXT_ALIAS,
buildId,
assetPrefix: config.assetPrefix,
generateEtags: config.generateEtags ? 'true' : '',
poweredByHeader: config.poweredByHeader ? 'true' : '',
canonicalBase: config.amp.canonicalBase || '',
basePath: config.basePath,
runtimeConfig: hasRuntimeConfig
? JSON.stringify({
publicRuntimeConfig: config.publicRuntimeConfig,
serverRuntimeConfig: config.serverRuntimeConfig,
})
: '',
previewProps: JSON.stringify(previewMode),
// base64 encode to make sure contents don't break webpack URL loading
loadedEnvFiles: Buffer.from(JSON.stringify(loadedEnvFiles)).toString(
'base64'
),
i18n: config.i18n ? JSON.stringify(config.i18n) : '',
}
Object.keys(pages).forEach((page) => {
const absolutePagePath = pages[page]
const bundleFile = normalizePagePath(page)
const isApiRoute = page.match(API_ROUTE)
const clientBundlePath = posix.join('pages', bundleFile)
const serverBundlePath = posix.join('pages', bundleFile)
const isLikeServerless = isTargetLikeServerless(target)
const isReserved = isReservedPage(page)
const isCustomError = isCustomErrorPage(page)
const isFlight = isFlightPage(config, absolutePagePath)
const webServerRuntime = !!config.experimental.concurrentFeatures
if (page.match(MIDDLEWARE_ROUTE)) {
const loaderOpts: MiddlewareLoaderOptions = {
absolutePagePath: pages[page],
page,
}
client[clientBundlePath] = `next-middleware-loader?${stringify(
loaderOpts
)}!`
return
}
if (webServerRuntime && !isReserved && !isCustomError && !isApiRoute) {
ssrEntries.set(clientBundlePath, { requireFlightManifest: isFlight })
serverWeb[serverBundlePath] = finalizeEntrypoint({
name: '[name].js',
value: `next-middleware-ssr-loader?${stringify({
page,
absoluteAppPath: pages['/_app'],
absoluteDocumentPath: pages['/_document'],
absolutePagePath,
isServerComponent: isFlight,
buildId,
basePath: config.basePath,
assetPrefix: config.assetPrefix,
} as any)}!`,
isServer: false,
isServerWeb: true,
})
}
if (isApiRoute && isLikeServerless) {
const serverlessLoaderOptions: ServerlessLoaderQuery = {
page,
absolutePagePath,
...defaultServerlessOptions,
}
server[serverBundlePath] = `next-serverless-loader?${stringify(
serverlessLoaderOptions
)}!`
} else if (isApiRoute || target === 'server') {
if (!webServerRuntime || isReserved || isCustomError) {
server[serverBundlePath] = [absolutePagePath]
}
} else if (
isLikeServerless &&
page !== '/_app' &&
page !== '/_document' &&
!webServerRuntime
) {
const serverlessLoaderOptions: ServerlessLoaderQuery = {
page,
absolutePagePath,
...defaultServerlessOptions,
}
server[serverBundlePath] = `next-serverless-loader?${stringify(
serverlessLoaderOptions
)}!`
}
if (page === '/_document') {
return
}
if (!isApiRoute) {
const pageLoaderOpts: ClientPagesLoaderOptions = {
page,
absolutePagePath,
}
const pageLoader = `next-client-pages-loader?${stringify(
pageLoaderOpts
)}!`
// Make sure next/router is a dependency of _app or else chunk splitting
// might cause the router to not be able to load causing hydration
// to fail
client[clientBundlePath] =
page === '/_app'
? [pageLoader, require.resolve('../client/router')]
: pageLoader
}
})
return {
client,
server,
serverWeb,
}
}
export function finalizeEntrypoint({
name,
value,
isServer,
isMiddleware,
isServerWeb,
}: {
isServer: boolean
name: string
value: ObjectValue<webpack5.EntryObject>
isMiddleware?: boolean
isServerWeb?: boolean
}): ObjectValue<webpack5.EntryObject> {
const entry =
typeof value !== 'object' || Array.isArray(value)
? { import: value }
: value
if (isServer) {
const isApi = name.startsWith('pages/api/')
return {
publicPath: isApi ? '' : undefined,
runtime: isApi ? 'webpack-api-runtime' : 'webpack-runtime',
layer: isApi ? 'api' : undefined,
...entry,
}
}
if (isServerWeb) {
const ssrMiddlewareEntry = {
library: {
name: ['_ENTRIES', `middleware_[name]`],
type: 'assign',
},
runtime: MIDDLEWARE_SSR_RUNTIME_WEBPACK,
...entry,
}
return ssrMiddlewareEntry
}
if (isMiddleware) {
const middlewareEntry = {
filename: 'server/[name].js',
layer: 'middleware',
library: {
name: ['_ENTRIES', `middleware_[name]`],
type: 'assign',
},
...entry,
}
return middlewareEntry
}
if (
name !== 'polyfills' &&
name !== 'main' &&
name !== 'amp' &&
name !== 'react-refresh'
) {
return {
dependOn:
name.startsWith('pages/') && name !== 'pages/_app'
? 'pages/_app'
: 'main',
...entry,
}
}
return entry
}