a9b9e00703
Makes it possible to switch between edge/server runtime in dev without breaking the server. Fixes slack: [1](https://vercel.slack.com/archives/CGU8HUTUH/p1659082535540549) [2](https://vercel.slack.com/archives/C02CDC2ALJH/p1658978287244359) [3](https://vercel.slack.com/archives/C03KAR5DCKC/p1656869427468779) #### middleware-plugin.ts `middlewareManifest` moved from module scope to local scope. Stale state from earlier builds ended up in `middleware-manifest.json`. Functions that changed from edge to server runtime stayed in the manifest as edge functions. #### on-demand-entry-handler.ts When a server or edge entry is added we check if it has switched runtime. If that's the case the old entry is removed. #### Reproduce Create edge API route and visit `/api/hello` ```js // pages/api/hello.js export const config = { runtime: 'experimental-edge', } export default () => new Response('Hello') ``` Change it to a server api route and visit `/api/hello`, it will explode. ```js // pages/api/hello.js export default function (req, res) { res.send('Hello') } ``` #### Bug not fixed One EDGE case is not fixed. It occurs if you switch between edge and server runtime several times without changing the content of the file: Edge runtime ```js export const config = { runtime: 'experimental-edge', } export default () => new Response('Hello') ``` Change it to a server runtime ```js export default function (req, res) { res.send('Hello') } ``` Change back to edge runtime, the content of the file is the same as the first time we compiled the edge runtime version. ```js export const config = { runtime: 'experimental-edge', } export default () => new Response('Hello') ``` The reason is that both the edge and server compiler emits to the same file (/.next/server/pages/api/hello.js) which makes this check fail in webpack: https://github.com/webpack/webpack/blob/main/lib/Compiler.js#L849-L861 Possible solution is to use different output folders for edge and server https://vercel.slack.com/archives/CGU8HUTUH/p1661163106667559 Co-authored-by: JJ Kasper <jj@jjsweb.site>
728 lines
21 KiB
TypeScript
728 lines
21 KiB
TypeScript
import type ws from 'ws'
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import origDebug from 'next/dist/compiled/debug'
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import type { webpack } from 'next/dist/compiled/webpack/webpack'
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import type { NextConfigComplete } from '../config-shared'
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import { EventEmitter } from 'events'
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import { findPageFile } from '../lib/find-page-file'
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import { runDependingOnPageType } from '../../build/entries'
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import { join, posix } from 'path'
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import { normalizePathSep } from '../../shared/lib/page-path/normalize-path-sep'
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import { normalizePagePath } from '../../shared/lib/page-path/normalize-page-path'
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import { ensureLeadingSlash } from '../../shared/lib/page-path/ensure-leading-slash'
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import { removePagePathTail } from '../../shared/lib/page-path/remove-page-path-tail'
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import { reportTrigger } from '../../build/output'
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import getRouteFromEntrypoint from '../get-route-from-entrypoint'
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import { serverComponentRegex } from '../../build/webpack/loaders/utils'
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import { getPageStaticInfo } from '../../build/analysis/get-page-static-info'
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import { isMiddlewareFile, isMiddlewareFilename } from '../../build/utils'
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import { PageNotFoundError } from '../../shared/lib/utils'
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import { DynamicParamTypesShort, FlightRouterState } from '../app-render'
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import {
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CompilerNameValues,
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COMPILER_INDEXES,
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COMPILER_NAMES,
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} from '../../shared/lib/constants'
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const debug = origDebug('next:on-demand-entry-handler')
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/**
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* Returns object keys with type inferred from the object key
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*/
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const keys = Object.keys as <T>(o: T) => Extract<keyof T, string>[]
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const COMPILER_KEYS = keys(COMPILER_INDEXES)
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function treePathToEntrypoint(
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segmentPath: string[],
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parentPath?: string
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): string {
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const [parallelRouteKey, segment] = segmentPath
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// TODO-APP: modify this path to cover parallelRouteKey convention
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const path =
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(parentPath ? parentPath + '/' : '') +
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(parallelRouteKey !== 'children' && !segment.startsWith('@')
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? parallelRouteKey + '/'
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: '') +
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(segment === '' ? 'page' : segment)
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// Last segment
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if (segmentPath.length === 2) {
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return path
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}
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const childSegmentPath = segmentPath.slice(2)
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return treePathToEntrypoint(childSegmentPath, path)
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}
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function convertDynamicParamTypeToSyntax(
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dynamicParamTypeShort: DynamicParamTypesShort,
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param: string
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) {
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switch (dynamicParamTypeShort) {
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case 'c':
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return `[...${param}]`
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case 'oc':
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return `[[...${param}]]`
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case 'd':
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return `[${param}]`
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default:
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throw new Error('Unknown dynamic param type')
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}
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}
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function getEntrypointsFromTree(
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tree: FlightRouterState,
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isFirst: boolean,
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parentPath: string[] = []
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) {
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const [segment, parallelRoutes] = tree
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const currentSegment = Array.isArray(segment)
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? convertDynamicParamTypeToSyntax(segment[2], segment[0])
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: segment
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const currentPath = [...parentPath, currentSegment]
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if (!isFirst && currentSegment === '') {
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// TODO get rid of '' at the start of tree
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return [treePathToEntrypoint(currentPath.slice(1))]
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}
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return Object.keys(parallelRoutes).reduce(
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(paths: string[], key: string): string[] => {
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const childTree = parallelRoutes[key]
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const childPages = getEntrypointsFromTree(childTree, false, [
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...currentPath,
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key,
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])
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return [...paths, ...childPages]
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},
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[]
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)
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}
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export const ADDED = Symbol('added')
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export const BUILDING = Symbol('building')
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export const BUILT = Symbol('built')
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interface EntryType {
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/**
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* Tells if a page is scheduled to be disposed.
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*/
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dispose?: boolean
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/**
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* Timestamp with the last time the page was active.
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*/
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lastActiveTime?: number
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/**
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* Page build status.
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*/
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status?: typeof ADDED | typeof BUILDING | typeof BUILT
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/**
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* Path to the page file relative to the dist folder with no extension.
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* For example: `pages/about/index`
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*/
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bundlePath: string
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/**
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* Webpack request to create a dependency for.
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*/
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request: string
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}
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// Shadowing check in ESLint does not account for enum
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// eslint-disable-next-line no-shadow
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export const enum EntryTypes {
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ENTRY,
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CHILD_ENTRY,
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}
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interface Entry extends EntryType {
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type: EntryTypes.ENTRY
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/**
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* The absolute page to the page file. Used for detecting if the file was removed. For example:
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* `/Users/Rick/project/pages/about/index.js`
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*/
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absolutePagePath: string
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/**
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* All parallel pages that match the same entry, for example:
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* ['/parallel/@bar/nested/@a/page', '/parallel/@bar/nested/@b/page', '/parallel/@foo/nested/@a/page', '/parallel/@foo/nested/@b/page']
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*/
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appPaths: string[] | null
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}
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interface ChildEntry extends EntryType {
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type: EntryTypes.CHILD_ENTRY
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/**
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* Which parent entries use this childEntry.
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*/
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parentEntries: Set<string>
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}
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export const entries: {
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/**
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* The key composed of the compiler name and the page. For example:
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* `edge-server/about`
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*/
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[entryName: string]: Entry | ChildEntry
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} = {}
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let invalidator: Invalidator
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export const getInvalidator = () => invalidator
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const doneCallbacks: EventEmitter | null = new EventEmitter()
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const lastClientAccessPages = ['']
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const lastServerAccessPagesForAppDir = ['']
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type BuildingTracker = Set<CompilerNameValues>
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type RebuildTracker = Set<CompilerNameValues>
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// Make sure only one invalidation happens at a time
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// Otherwise, webpack hash gets changed and it'll force the client to reload.
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class Invalidator {
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private multiCompiler: webpack.MultiCompiler
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private building: BuildingTracker = new Set()
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private rebuildAgain: RebuildTracker = new Set()
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constructor(multiCompiler: webpack.MultiCompiler) {
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this.multiCompiler = multiCompiler
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}
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public shouldRebuildAll() {
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return this.rebuildAgain.size > 0
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}
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invalidate(compilerKeys: typeof COMPILER_KEYS = COMPILER_KEYS): void {
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for (const key of compilerKeys) {
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// If there's a current build is processing, we won't abort it by invalidating.
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// (If aborted, it'll cause a client side hard reload)
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// But let it to invalidate just after the completion.
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// So, it can re-build the queued pages at once.
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if (this.building.has(key)) {
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this.rebuildAgain.add(key)
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continue
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}
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this.multiCompiler.compilers[COMPILER_INDEXES[key]].watching?.invalidate()
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this.building.add(key)
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}
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}
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public startBuilding(compilerKey: keyof typeof COMPILER_INDEXES) {
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this.building.add(compilerKey)
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}
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public doneBuilding() {
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const rebuild: typeof COMPILER_KEYS = []
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for (const key of COMPILER_KEYS) {
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this.building.delete(key)
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if (this.rebuildAgain.has(key)) {
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rebuild.push(key)
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this.rebuildAgain.delete(key)
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}
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}
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this.invalidate(rebuild)
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}
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}
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function disposeInactiveEntries(maxInactiveAge: number) {
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Object.keys(entries).forEach((entryKey) => {
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const entryData = entries[entryKey]
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const { lastActiveTime, status, dispose } = entryData
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// TODO-APP: implement disposing of CHILD_ENTRY
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if (entryData.type === EntryTypes.CHILD_ENTRY) {
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return
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}
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if (dispose)
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// Skip pages already scheduled for disposing
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return
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// This means this entry is currently building or just added
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// We don't need to dispose those entries.
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if (status !== BUILT) return
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// We should not build the last accessed page even we didn't get any pings
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// Sometimes, it's possible our XHR ping to wait before completing other requests.
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// In that case, we should not dispose the current viewing page
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if (
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lastClientAccessPages.includes(entryKey) ||
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lastServerAccessPagesForAppDir.includes(entryKey)
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)
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return
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if (lastActiveTime && Date.now() - lastActiveTime > maxInactiveAge) {
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entries[entryKey].dispose = true
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}
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})
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}
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// Normalize both app paths and page paths
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function tryToNormalizePagePath(page: string) {
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try {
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return normalizePagePath(page)
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} catch (err) {
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console.error(err)
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throw new PageNotFoundError(page)
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}
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}
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/**
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* Attempts to find a page file path from the given pages absolute directory,
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* a page and allowed extensions. If the page can't be found it will throw an
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* error. It defaults the `/_error` page to Next.js internal error page.
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*
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* @param rootDir Absolute path to the project root.
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* @param pagesDir Absolute path to the pages folder with trailing `/pages`.
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* @param normalizedPagePath The page normalized (it will be denormalized).
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* @param pageExtensions Array of page extensions.
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*/
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async function findPagePathData(
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rootDir: string,
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page: string,
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extensions: string[],
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pagesDir?: string,
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appDir?: string
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) {
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const normalizedPagePath = tryToNormalizePagePath(page)
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let pagePath: string | null = null
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if (isMiddlewareFile(normalizedPagePath)) {
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pagePath = await findPageFile(
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rootDir,
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normalizedPagePath,
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extensions,
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false
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)
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if (!pagePath) {
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throw new PageNotFoundError(normalizedPagePath)
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}
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const pageUrl = ensureLeadingSlash(
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removePagePathTail(normalizePathSep(pagePath), {
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extensions,
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})
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)
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return {
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absolutePagePath: join(rootDir, pagePath),
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bundlePath: normalizedPagePath.slice(1),
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page: posix.normalize(pageUrl),
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}
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}
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// Check appDir first falling back to pagesDir
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if (appDir) {
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pagePath = await findPageFile(appDir, normalizedPagePath, extensions, true)
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if (pagePath) {
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const pageUrl = ensureLeadingSlash(
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removePagePathTail(normalizePathSep(pagePath), {
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keepIndex: true,
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extensions,
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})
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)
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return {
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absolutePagePath: join(appDir, pagePath),
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bundlePath: posix.join('app', normalizePagePath(pageUrl)),
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page: posix.normalize(pageUrl),
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}
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}
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}
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if (!pagePath && pagesDir) {
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pagePath = await findPageFile(
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pagesDir,
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normalizedPagePath,
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extensions,
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false
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)
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}
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if (pagePath !== null && pagesDir) {
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const pageUrl = ensureLeadingSlash(
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removePagePathTail(normalizePathSep(pagePath), {
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extensions,
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})
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)
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return {
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absolutePagePath: join(pagesDir, pagePath),
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bundlePath: posix.join('pages', normalizePagePath(pageUrl)),
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page: posix.normalize(pageUrl),
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}
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}
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if (page === '/_error') {
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return {
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absolutePagePath: require.resolve('next/dist/pages/_error'),
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bundlePath: page,
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page: normalizePathSep(page),
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}
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} else {
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throw new PageNotFoundError(normalizedPagePath)
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}
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}
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export function onDemandEntryHandler({
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maxInactiveAge,
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multiCompiler,
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nextConfig,
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pagesBufferLength,
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pagesDir,
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rootDir,
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appDir,
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}: {
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maxInactiveAge: number
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multiCompiler: webpack.MultiCompiler
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nextConfig: NextConfigComplete
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pagesBufferLength: number
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pagesDir?: string
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rootDir: string
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appDir?: string
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}) {
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invalidator = new Invalidator(multiCompiler)
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const startBuilding = (compilation: webpack.Compilation) => {
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const compilationName = compilation.name as any as CompilerNameValues
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invalidator.startBuilding(compilationName)
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}
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for (const compiler of multiCompiler.compilers) {
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compiler.hooks.make.tap('NextJsOnDemandEntries', startBuilding)
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}
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function getPagePathsFromEntrypoints(
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type: CompilerNameValues,
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entrypoints: Map<string, { name?: string }>,
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root?: boolean
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) {
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const pagePaths: string[] = []
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for (const entrypoint of entrypoints.values()) {
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const page = getRouteFromEntrypoint(entrypoint.name!, root)
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if (page) {
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pagePaths.push(`${type}${page}`)
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} else if (
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(root && entrypoint.name === 'root') ||
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isMiddlewareFilename(entrypoint.name)
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) {
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pagePaths.push(`${type}/${entrypoint.name}`)
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}
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}
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return pagePaths
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}
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multiCompiler.hooks.done.tap('NextJsOnDemandEntries', (multiStats) => {
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if (invalidator.shouldRebuildAll()) {
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return invalidator.doneBuilding()
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}
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const [clientStats, serverStats, edgeServerStats] = multiStats.stats
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const root = !!appDir
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const pagePaths = [
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...getPagePathsFromEntrypoints(
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COMPILER_NAMES.client,
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clientStats.compilation.entrypoints,
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root
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),
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...getPagePathsFromEntrypoints(
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COMPILER_NAMES.server,
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serverStats.compilation.entrypoints,
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root
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),
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...(edgeServerStats
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? getPagePathsFromEntrypoints(
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COMPILER_NAMES.edgeServer,
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edgeServerStats.compilation.entrypoints,
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root
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)
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: []),
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]
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for (const page of pagePaths) {
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const entry = entries[page]
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if (!entry) {
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continue
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}
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if (entry.status !== BUILDING) {
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continue
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}
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entry.status = BUILT
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doneCallbacks!.emit(page)
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}
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invalidator.doneBuilding()
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})
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const pingIntervalTime = Math.max(1000, Math.min(5000, maxInactiveAge))
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setInterval(function () {
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disposeInactiveEntries(maxInactiveAge)
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}, pingIntervalTime + 1000).unref()
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function handleAppDirPing(
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tree: FlightRouterState
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): { success: true } | { invalid: true } {
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const pages = getEntrypointsFromTree(tree, true)
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let toSend: { invalid: true } | { success: true } = { invalid: true }
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for (const page of pages) {
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for (const compilerType of [
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COMPILER_NAMES.client,
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COMPILER_NAMES.server,
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COMPILER_NAMES.edgeServer,
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]) {
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const pageKey = `${compilerType}/${page}`
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const entryInfo = entries[pageKey]
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// If there's no entry, it may have been invalidated and needs to be re-built.
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if (!entryInfo) {
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// if (page !== lastEntry) client pings, but there's no entry for page
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continue
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}
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// We don't need to maintain active state of anything other than BUILT entries
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if (entryInfo.status !== BUILT) continue
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|
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// If there's an entryInfo
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if (!lastServerAccessPagesForAppDir.includes(pageKey)) {
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lastServerAccessPagesForAppDir.unshift(pageKey)
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|
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// Maintain the buffer max length
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// TODO: verify that the current pageKey is not at the end of the array as multiple entrypoints can exist
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if (lastServerAccessPagesForAppDir.length > pagesBufferLength) {
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lastServerAccessPagesForAppDir.pop()
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}
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}
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entryInfo.lastActiveTime = Date.now()
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entryInfo.dispose = false
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toSend = { success: true }
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}
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}
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|
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return toSend
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}
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|
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function handlePing(pg: string) {
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|
const page = normalizePathSep(pg)
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|
let toSend: { invalid: true } | { success: true } = { invalid: true }
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|
|
for (const compilerType of [
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COMPILER_NAMES.client,
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COMPILER_NAMES.server,
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|
COMPILER_NAMES.edgeServer,
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|
]) {
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|
const pageKey = `${compilerType}${page}`
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const entryInfo = entries[pageKey]
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|
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// If there's no entry, it may have been invalidated and needs to be re-built.
|
|
if (!entryInfo) {
|
|
// if (page !== lastEntry) client pings, but there's no entry for page
|
|
if (compilerType === COMPILER_NAMES.client) {
|
|
return { invalid: true }
|
|
}
|
|
continue
|
|
}
|
|
|
|
// 404 is an on demand entry but when a new page is added we have to refresh the page
|
|
toSend = page === '/_error' ? { invalid: true } : { success: true }
|
|
|
|
// We don't need to maintain active state of anything other than BUILT entries
|
|
if (entryInfo.status !== BUILT) continue
|
|
|
|
// If there's an entryInfo
|
|
if (!lastClientAccessPages.includes(pageKey)) {
|
|
lastClientAccessPages.unshift(pageKey)
|
|
|
|
// Maintain the buffer max length
|
|
if (lastClientAccessPages.length > pagesBufferLength) {
|
|
lastClientAccessPages.pop()
|
|
}
|
|
}
|
|
entryInfo.lastActiveTime = Date.now()
|
|
entryInfo.dispose = false
|
|
}
|
|
return toSend
|
|
}
|
|
|
|
return {
|
|
async ensurePage({
|
|
page,
|
|
clientOnly,
|
|
appPaths = null,
|
|
}: {
|
|
page: string
|
|
clientOnly: boolean
|
|
appPaths?: string[] | null
|
|
}): Promise<void> {
|
|
const stalledTime = 60
|
|
const stalledEnsureTimeout = setTimeout(() => {
|
|
debug(
|
|
`Ensuring ${page} has taken longer than ${stalledTime}s, if this continues to stall this may be a bug`
|
|
)
|
|
}, stalledTime * 1000)
|
|
|
|
try {
|
|
const pagePathData = await findPagePathData(
|
|
rootDir,
|
|
page,
|
|
nextConfig.pageExtensions,
|
|
pagesDir,
|
|
appDir
|
|
)
|
|
|
|
const isServerComponent = serverComponentRegex.test(
|
|
pagePathData.absolutePagePath
|
|
)
|
|
const isInsideAppDir =
|
|
appDir && pagePathData.absolutePagePath.startsWith(appDir)
|
|
|
|
const addEntry = (
|
|
compilerType: CompilerNameValues
|
|
): {
|
|
entryKey: string
|
|
newEntry: boolean
|
|
shouldInvalidate: boolean
|
|
} => {
|
|
const entryKey = `${compilerType}${pagePathData.page}`
|
|
|
|
if (entries[entryKey]) {
|
|
entries[entryKey].dispose = false
|
|
entries[entryKey].lastActiveTime = Date.now()
|
|
if (entries[entryKey].status === BUILT) {
|
|
return {
|
|
entryKey,
|
|
newEntry: false,
|
|
shouldInvalidate: false,
|
|
}
|
|
}
|
|
|
|
return {
|
|
entryKey,
|
|
newEntry: false,
|
|
shouldInvalidate: true,
|
|
}
|
|
}
|
|
|
|
entries[entryKey] = {
|
|
type: EntryTypes.ENTRY,
|
|
appPaths,
|
|
absolutePagePath: pagePathData.absolutePagePath,
|
|
request: pagePathData.absolutePagePath,
|
|
bundlePath: pagePathData.bundlePath,
|
|
dispose: false,
|
|
lastActiveTime: Date.now(),
|
|
status: ADDED,
|
|
}
|
|
|
|
return {
|
|
entryKey: entryKey,
|
|
newEntry: true,
|
|
shouldInvalidate: true,
|
|
}
|
|
}
|
|
|
|
const staticInfo = await getPageStaticInfo({
|
|
pageFilePath: pagePathData.absolutePagePath,
|
|
nextConfig,
|
|
isDev: true,
|
|
})
|
|
|
|
const added = new Map<CompilerNameValues, ReturnType<typeof addEntry>>()
|
|
|
|
await runDependingOnPageType({
|
|
page: pagePathData.page,
|
|
pageRuntime: staticInfo.runtime,
|
|
onClient: () => {
|
|
// Skip adding the client entry for app / Server Components.
|
|
if (isServerComponent || isInsideAppDir) {
|
|
return
|
|
}
|
|
added.set(COMPILER_NAMES.client, addEntry(COMPILER_NAMES.client))
|
|
},
|
|
onServer: () => {
|
|
added.set(COMPILER_NAMES.server, addEntry(COMPILER_NAMES.server))
|
|
const edgeServerEntry = `${COMPILER_NAMES.edgeServer}${pagePathData.page}`
|
|
if (entries[edgeServerEntry]) {
|
|
// Runtime switched from edge to server
|
|
delete entries[edgeServerEntry]
|
|
}
|
|
},
|
|
onEdgeServer: () => {
|
|
added.set(
|
|
COMPILER_NAMES.edgeServer,
|
|
addEntry(COMPILER_NAMES.edgeServer)
|
|
)
|
|
const serverEntry = `${COMPILER_NAMES.server}${pagePathData.page}`
|
|
if (entries[serverEntry]) {
|
|
// Runtime switched from server to edge
|
|
delete entries[serverEntry]
|
|
}
|
|
},
|
|
})
|
|
|
|
const addedValues = [...added.values()]
|
|
const entriesThatShouldBeInvalidated = addedValues.filter(
|
|
(entry) => entry.shouldInvalidate
|
|
)
|
|
const hasNewEntry = addedValues.some((entry) => entry.newEntry)
|
|
|
|
if (hasNewEntry) {
|
|
reportTrigger(
|
|
!clientOnly && hasNewEntry
|
|
? `${pagePathData.page} (client and server)`
|
|
: pagePathData.page
|
|
)
|
|
}
|
|
|
|
if (entriesThatShouldBeInvalidated.length > 0) {
|
|
const invalidatePromises = entriesThatShouldBeInvalidated.map(
|
|
({ entryKey }) => {
|
|
return new Promise<void>((resolve, reject) => {
|
|
doneCallbacks!.once(entryKey, (err: Error) => {
|
|
if (err) {
|
|
return reject(err)
|
|
}
|
|
resolve()
|
|
})
|
|
})
|
|
}
|
|
)
|
|
invalidator.invalidate([...added.keys()])
|
|
await Promise.all(invalidatePromises)
|
|
}
|
|
} finally {
|
|
clearTimeout(stalledEnsureTimeout)
|
|
}
|
|
},
|
|
|
|
onHMR(client: ws) {
|
|
client.addEventListener('message', ({ data }) => {
|
|
try {
|
|
const parsedData = JSON.parse(
|
|
typeof data !== 'string' ? data.toString() : data
|
|
)
|
|
|
|
if (parsedData.event === 'ping') {
|
|
const result = parsedData.appDirRoute
|
|
? handleAppDirPing(parsedData.tree)
|
|
: handlePing(parsedData.page)
|
|
client.send(
|
|
JSON.stringify({
|
|
...result,
|
|
[parsedData.appDirRoute ? 'action' : 'event']: 'pong',
|
|
})
|
|
)
|
|
}
|
|
} catch (_) {}
|
|
})
|
|
},
|
|
}
|
|
}
|