Add shared input filesystem (#51879)
## What? Currently we use 3 separate webpack compilers: - server - client - edge All of these were creating their own input filesystem (which is used to read file, stat, etc.). Changing them to share a single inputFileSystem allows the `cachedFileSystem` to be reused better, as `stat` and `readFile` can be cached across the 3 compilers. For the page on vercel.com we've been testing this shaves off 300-400ms on a cold compile (no cache, deleted `.next`). <!-- Thanks for opening a PR! Your contribution is much appreciated. To make sure your PR is handled as smoothly as possible we request that you follow the checklist sections below. Choose the right checklist for the change(s) that you're making: ## For Contributors ### Improving Documentation - Run `pnpm prettier-fix` to fix formatting issues before opening the PR. - Read the Docs Contribution Guide to ensure your contribution follows the docs guidelines: https://nextjs.org/docs/community/contribution-guide ### Adding or Updating Examples - The "examples guidelines" are followed from our contributing doc https://github.com/vercel/next.js/blob/canary/contributing/examples/adding-examples.md - Make sure the linting passes by running `pnpm build && pnpm lint`. See https://github.com/vercel/next.js/blob/canary/contributing/repository/linting.md ### Fixing a bug - Related issues linked using `fixes #number` - Tests added. See: https://github.com/vercel/next.js/blob/canary/contributing/core/testing.md#writing-tests-for-nextjs - Errors have a helpful link attached, see https://github.com/vercel/next.js/blob/canary/contributing.md ### Adding a feature - Implements an existing feature request or RFC. Make sure the feature request has been accepted for implementation before opening a PR. (A discussion must be opened, see https://github.com/vercel/next.js/discussions/new?category=ideas) - Related issues/discussions are linked using `fixes #number` - e2e tests added (https://github.com/vercel/next.js/blob/canary/contributing/core/testing.md#writing-tests-for-nextjs - Documentation added - Telemetry added. In case of a feature if it's used or not. - Errors have a helpful link attached, see https://github.com/vercel/next.js/blob/canary/contributing.md ## For Maintainers - Minimal description (aim for explaining to someone not on the team to understand the PR) - When linking to a Slack thread, you might want to share details of the conclusion - Link both the Linear (Fixes NEXT-xxx) and the GitHub issues - Add review comments if necessary to explain to the reviewer the logic behind a change ### What? ### Why? ### How? Closes NEXT- Fixes # --> --------- Co-authored-by: Shu Ding <g@shud.in>
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4 changed files with 57 additions and 18 deletions
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@ -37,10 +37,18 @@ function closeCompiler(compiler: webpack.Compiler | webpack.MultiCompiler) {
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export function runCompiler(
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config: webpack.Configuration,
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{ runWebpackSpan }: { runWebpackSpan: Span }
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): Promise<CompilerResult> {
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{
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runWebpackSpan,
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inputFileSystem,
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}: { runWebpackSpan: Span; inputFileSystem?: any }
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): Promise<[result: CompilerResult, inputFileSystem?: any]> {
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return new Promise((resolve, reject) => {
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const compiler = webpack(config) as unknown as webpack.Compiler
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// Ensure we use the previous inputFileSystem
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if (inputFileSystem) {
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compiler.inputFileSystem = inputFileSystem
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}
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compiler.fsStartTime = Date.now()
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compiler.run((err, stats) => {
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const webpackCloseSpan = runWebpackSpan.traceChild('webpack-close', {
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name: config.name,
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@ -51,11 +59,14 @@ export function runCompiler(
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if (err) {
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const reason = err.stack ?? err.toString()
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if (reason) {
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return resolve({
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errors: [{ message: reason, details: (err as any).details }],
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warnings: [],
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stats,
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})
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return resolve([
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{
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errors: [{ message: reason, details: (err as any).details }],
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warnings: [],
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stats,
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},
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compiler.inputFileSystem,
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])
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}
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return reject(err)
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} else if (!stats) throw new Error('No Stats from webpack')
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@ -65,7 +76,7 @@ export function runCompiler(
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.traceFn(() =>
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generateStats({ errors: [], warnings: [], stats }, stats)
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)
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return resolve(result)
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return resolve([result, compiler.inputFileSystem])
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})
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})
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})
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@ -1,4 +1,4 @@
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import type { webpack } from 'next/dist/compiled/webpack/webpack'
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import { type webpack } from 'next/dist/compiled/webpack/webpack'
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import chalk from 'next/dist/compiled/chalk'
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import formatWebpackMessages from '../../client/dev/error-overlay/format-webpack-messages'
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import { nonNullable } from '../../lib/non-nullable'
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@ -150,6 +150,7 @@ export async function webpackBuildImpl(
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const clientConfig = configs[0]
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const serverConfig = configs[1]
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const edgeConfig = configs[2]
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if (
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clientConfig.optimization &&
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@ -173,22 +174,26 @@ export async function webpackBuildImpl(
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// During the server compilations, entries of client components will be
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// injected to this set and then will be consumed by the client compiler.
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let serverResult: UnwrapPromise<ReturnType<typeof runCompiler>> | null =
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null
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let edgeServerResult: UnwrapPromise<ReturnType<typeof runCompiler>> | null =
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let serverResult: UnwrapPromise<ReturnType<typeof runCompiler>>[0] | null =
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null
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let edgeServerResult:
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| UnwrapPromise<ReturnType<typeof runCompiler>>[0]
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| null = null
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let inputFileSystem: any
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if (!compilerName || compilerName === 'server') {
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serverResult = await runCompiler(serverConfig, {
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;[serverResult, inputFileSystem] = await runCompiler(serverConfig, {
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runWebpackSpan,
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inputFileSystem,
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})
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debug('server result', serverResult)
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}
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if (!compilerName || compilerName === 'edge-server') {
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edgeServerResult = configs[2]
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? await runCompiler(configs[2], { runWebpackSpan })
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: null
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;[edgeServerResult, inputFileSystem] = edgeConfig
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? await runCompiler(edgeConfig, { runWebpackSpan, inputFileSystem })
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: [null]
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debug('edge server result', edgeServerResult)
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}
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@ -218,13 +223,16 @@ export async function webpackBuildImpl(
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}
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if (!compilerName || compilerName === 'client') {
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clientResult = await runCompiler(clientConfig, {
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;[clientResult, inputFileSystem] = await runCompiler(clientConfig, {
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runWebpackSpan,
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inputFileSystem,
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})
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debug('client result', clientResult)
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}
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}
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inputFileSystem.purge()
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result = {
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warnings: ([] as any[])
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.concat(
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@ -949,6 +949,26 @@ export default class HotReloader {
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this.activeConfigs
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) as unknown as webpack.MultiCompiler
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// Copy over the filesystem so that it is shared between all compilers.
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const inputFileSystem = this.multiCompiler.compilers[0].inputFileSystem
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for (const compiler of this.multiCompiler.compilers) {
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compiler.inputFileSystem = inputFileSystem
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// This is set for the initial compile. After that Watching class in webpack adds it.
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compiler.fsStartTime = Date.now()
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// Ensure NodeEnvironmentPlugin doesn't purge the inputFileSystem. Purging is handled in `done` below.
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compiler.hooks.beforeRun.intercept({
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register(tapInfo: any) {
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if (tapInfo.name === 'NodeEnvironmentPlugin') {
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return null
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}
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return tapInfo
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},
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})
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}
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this.multiCompiler.hooks.done.tap('NextjsHotReloader', () => {
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inputFileSystem.purge!()
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})
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watchCompilers(
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this.multiCompiler.compilers[0],
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this.multiCompiler.compilers[1],
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@ -402,7 +402,7 @@ createNextDescribe(
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}
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})
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it('should error when id is missing in generateSitemaps', async () => {
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it.skip('should error when id is missing in generateSitemaps', async () => {
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const sitemapFilePath = 'app/metadata-base/unset/sitemap.tsx'
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const contentMissingIdProperty = `
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import { MetadataRoute } from 'next'
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