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webpack-config.ts
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webpack-config.ts
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import path from 'path'
import webpack from 'webpack'
import resolve from 'next/dist/compiled/resolve/index.js'
import NextJsSsrImportPlugin from './webpack/plugins/nextjs-ssr-import'
import NextJsSSRModuleCachePlugin from './webpack/plugins/nextjs-ssr-module-cache'
import PagesManifestPlugin from './webpack/plugins/pages-manifest-plugin'
import BuildManifestPlugin from './webpack/plugins/build-manifest-plugin'
import ChunkNamesPlugin from './webpack/plugins/chunk-names-plugin'
import { ReactLoadablePlugin } from './webpack/plugins/react-loadable-plugin'
import { SERVER_DIRECTORY, REACT_LOADABLE_MANIFEST, CHUNK_GRAPH_MANIFEST, CLIENT_STATIC_FILES_RUNTIME_WEBPACK, CLIENT_STATIC_FILES_RUNTIME_MAIN } from 'next-server/constants'
import { NEXT_PROJECT_ROOT, NEXT_PROJECT_ROOT_DIST_CLIENT, PAGES_DIR_ALIAS, DOT_NEXT_ALIAS } from '../lib/constants'
import {TerserPlugin} from './webpack/plugins/terser-webpack-plugin/src/index'
import { ServerlessPlugin } from './webpack/plugins/serverless-plugin'
import { AllModulesIdentifiedPlugin } from './webpack/plugins/all-modules-identified-plugin'
import { SharedRuntimePlugin } from './webpack/plugins/shared-runtime-plugin'
import { HashedChunkIdsPlugin } from './webpack/plugins/hashed-chunk-ids-plugin'
import { ChunkGraphPlugin } from './webpack/plugins/chunk-graph-plugin'
import { WebpackEntrypoints } from './entries'
type ExcludesFalse = <T>(x: T | false) => x is T
export default function getBaseWebpackConfig (dir: string, {dev = false, debug = false, isServer = false, buildId, config, target = 'server', entrypoints, selectivePageBuilding = false, selectivePageBuildingCacheIdentifier = ''}: {dev?: boolean, debug?: boolean, isServer?: boolean, buildId: string, config: any, target?: string, entrypoints: WebpackEntrypoints, selectivePageBuilding?: boolean, selectivePageBuildingCacheIdentifier?: string}): webpack.Configuration {
const defaultLoaders = {
babel: {
loader: 'next-babel-loader',
options: { isServer, cwd: dir, asyncToPromises: config.experimental.asyncToPromises }
},
// Backwards compat
hotSelfAccept: {
loader: 'noop-loader'
}
}
// Support for NODE_PATH
const nodePathList = (process.env.NODE_PATH || '')
.split(process.platform === 'win32' ? ';' : ':')
.filter((p) => !!p)
const distDir = path.join(dir, config.distDir)
const outputDir = target === 'serverless' ? 'serverless' : SERVER_DIRECTORY
const outputPath = path.join(distDir, isServer ? outputDir : '')
const totalPages = Object.keys(entrypoints).length
const clientEntries = !isServer ? {
// Backwards compatibility
'main.js': [],
[CLIENT_STATIC_FILES_RUNTIME_MAIN]: `.${path.sep}` + path.relative(dir, path.join(NEXT_PROJECT_ROOT_DIST_CLIENT, (dev ? `next-dev.js` : 'next.js')))
} : undefined
const resolveConfig = {
// Disable .mjs for node_modules bundling
extensions: isServer ? ['.js', '.mjs', '.jsx', '.json', '.wasm'] : ['.mjs', '.js', '.jsx', '.json', '.wasm'],
modules: [
'node_modules',
...nodePathList // Support for NODE_PATH environment variable
],
alias: {
// These aliases make sure the wrapper module is not included in the bundles
// Which makes bundles slightly smaller, but also skips parsing a module that we know will result in this alias
'next/head': 'next-server/dist/lib/head.js',
'next/router': 'next/dist/client/router.js',
'next/config': 'next-server/dist/lib/runtime-config.js',
'next/dynamic': 'next-server/dist/lib/dynamic.js',
next: NEXT_PROJECT_ROOT,
[PAGES_DIR_ALIAS]: path.join(dir, 'pages'),
[DOT_NEXT_ALIAS]: distDir
},
mainFields: isServer ? ['main', 'module'] : ['browser', 'module', 'main']
}
const webpackMode = dev ? 'development' : 'production'
const terserPluginConfig = {
parallel: true,
sourceMap: false,
cache: true,
cpus: config.experimental.cpus,
distDir: distDir
}
let webpackConfig: webpack.Configuration = {
mode: webpackMode,
devtool: (dev || debug) ? 'cheap-module-source-map' : false,
name: isServer ? 'server' : 'client',
target: isServer ? 'node' : 'web',
externals: !isServer ? undefined : target !== 'serverless' ? [
(context, request, callback) => {
const notExternalModules = [
'next/app', 'next/document', 'next/link', 'next/error',
'string-hash',
'next/constants'
]
if (notExternalModules.indexOf(request) !== -1) {
return callback()
}
resolve(request, { basedir: dir, preserveSymlinks: true }, (err, res) => {
if (err) {
return callback()
}
if (!res) {
return callback()
}
// Default pages have to be transpiled
if (res.match(/next[/\\]dist[/\\]/) || res.match(/node_modules[/\\]@babel[/\\]runtime[/\\]/) || res.match(/node_modules[/\\]@babel[/\\]runtime-corejs2[/\\]/)) {
return callback()
}
// Webpack itself has to be compiled because it doesn't always use module relative paths
if (res.match(/node_modules[/\\]webpack/) || res.match(/node_modules[/\\]css-loader/)) {
return callback()
}
// styled-jsx has to be transpiled
if (res.match(/node_modules[/\\]styled-jsx/)) {
return callback()
}
if (res.match(/node_modules[/\\].*\.js$/)) {
return callback(undefined, `commonjs ${request}`)
}
callback()
})
}
] : [
// When the serverless target is used all node_modules will be compiled into the output bundles
// So that the serverless bundles have 0 runtime dependencies
'amp-toolbox-optimizer' // except this one
],
optimization: Object.assign({
checkWasmTypes: false,
nodeEnv: false,
}, isServer ? {
splitChunks: false,
minimize: false
} : {
runtimeChunk: selectivePageBuilding ? false : {
name: CLIENT_STATIC_FILES_RUNTIME_WEBPACK
},
splitChunks: dev ? {
cacheGroups: {
default: false,
vendors: false
}
} : selectivePageBuilding ? {
cacheGroups: {
default: false,
vendors: false,
react: {
name: 'commons',
chunks: 'all',
test: /[\\/]node_modules[\\/](react|react-dom)[\\/]/
}
}
} : {
chunks: 'all',
cacheGroups: {
default: false,
vendors: false,
commons: {
name: 'commons',
chunks: 'all',
minChunks: totalPages > 2 ? totalPages * 0.5 : 2
},
react: {
name: 'commons',
chunks: 'all',
test: /[\\/]node_modules[\\/](react|react-dom)[\\/]/
}
}
},
minimize: !(dev || debug),
minimizer: !(dev || debug) ? [
new TerserPlugin({...terserPluginConfig,
terserOptions: {
safari10: true,
...(selectivePageBuilding ? { compress: false, mangle: true } : undefined)
}
})
] : undefined,
}, selectivePageBuilding ? {
providedExports: false,
usedExports: false,
concatenateModules: false,
} : undefined),
recordsPath: selectivePageBuilding ? undefined : path.join(outputPath, 'records.json'),
context: dir,
// Kept as function to be backwards compatible
entry: async () => {
return {
...clientEntries ? clientEntries : {},
...entrypoints
}
},
output: {
path: outputPath,
filename: ({chunk}: {chunk: {name: string}}) => {
// Use `[name]-[contenthash].js` in production
if (!dev && (chunk.name === CLIENT_STATIC_FILES_RUNTIME_MAIN || chunk.name === CLIENT_STATIC_FILES_RUNTIME_WEBPACK)) {
return chunk.name.replace(/\.js$/, '-[contenthash].js')
}
return '[name]'
},
libraryTarget: isServer ? 'commonjs2' : 'var',
hotUpdateChunkFilename: 'static/webpack/[id].[hash].hot-update.js',
hotUpdateMainFilename: 'static/webpack/[hash].hot-update.json',
// This saves chunks with the name given via `import()`
chunkFilename: isServer ? `${dev ? '[name]' : '[name].[contenthash]'}.js` : `static/chunks/${dev ? '[name]' : '[name].[contenthash]'}.js`,
strictModuleExceptionHandling: true,
crossOriginLoading: config.crossOrigin,
futureEmitAssets: !dev,
webassemblyModuleFilename: 'static/wasm/[modulehash].wasm'
},
performance: false,
resolve: resolveConfig,
resolveLoader: {
modules: [
path.join(__dirname, 'webpack', 'loaders'), // The loaders Next.js provides
'node_modules',
...nodePathList // Support for NODE_PATH environment variable
]
},
// @ts-ignore this is filtered
module: {
rules: [
selectivePageBuilding && !isServer && {
test: /\.(js|mjs|jsx)$/,
exclude: /\.min\.(js|mjs|jsx)$/,
use: {
loader: 'next-minify-loader',
options: { terserOptions: { safari10: true, compress: true, mangle: false } }
}
},
config.experimental.ampBindInitData && !isServer && {
test: /\.(js|mjs|jsx)$/,
include: [path.join(dir, 'data')],
use: 'next-data-loader'
},
{
test: /\.(js|mjs|jsx)$/,
include: [dir, /next-server[\\/]dist[\\/]lib/],
exclude: (path: string) => {
if (/next-server[\\/]dist[\\/]lib/.test(path)) {
return false
}
return /node_modules/.test(path)
},
use: defaultLoaders.babel
}
].filter(Boolean)
},
plugins: [
// This plugin makes sure `output.filename` is used for entry chunks
new ChunkNamesPlugin(),
new webpack.DefinePlugin({
...(Object.keys(config.env).reduce((acc, key) => {
if (/^(?:NODE_.+)|(?:__.+)$/i.test(key)) {
throw new Error(`The key "${key}" under "env" in next.config.js is not allowed. https://err.sh/zeit/next.js/env-key-not-allowed`)
}
return {
...acc,
[`process.env.${key}`]: JSON.stringify(config.env[key])
}
}, {})),
'process.env.NODE_ENV': JSON.stringify(webpackMode),
'process.crossOrigin': JSON.stringify(config.crossOrigin),
'process.browser': JSON.stringify(!isServer),
// This is used in client/dev-error-overlay/hot-dev-client.js to replace the dist directory
...(dev && !isServer ? {
'process.env.__NEXT_DIST_DIR': JSON.stringify(distDir)
} : {}),
'process.env.__NEXT_EXPERIMENTAL_DEBUG': JSON.stringify(debug),
'process.env.__NEXT_EXPORT_TRAILING_SLASH': JSON.stringify(config.experimental.exportTrailingSlash)
}),
!isServer && new ReactLoadablePlugin({
filename: REACT_LOADABLE_MANIFEST
}),
!isServer && selectivePageBuilding && new ChunkGraphPlugin(buildId, path.resolve(dir), { filename: CHUNK_GRAPH_MANIFEST, selectivePageBuildingCacheIdentifier }),
...(dev ? (() => {
// Even though require.cache is server only we have to clear assets from both compilations
// This is because the client compilation generates the build manifest that's used on the server side
const {NextJsRequireCacheHotReloader} = require('./webpack/plugins/nextjs-require-cache-hot-reloader')
const {UnlinkRemovedPagesPlugin} = require('./webpack/plugins/unlink-removed-pages-plugin')
const devPlugins = [
new UnlinkRemovedPagesPlugin(),
new webpack.NoEmitOnErrorsPlugin(),
new NextJsRequireCacheHotReloader(),
]
if(!isServer) {
const AutoDllPlugin = require('autodll-webpack-plugin')
devPlugins.push(
new AutoDllPlugin({
filename: '[name]_[hash].js',
path: './static/development/dll',
context: dir,
entry: {
dll: [
'react',
'react-dom'
]
},
config: {
mode: webpackMode,
resolve: resolveConfig
}
})
)
devPlugins.push(new webpack.HotModuleReplacementPlugin())
}
return devPlugins
})() : []),
!dev && new webpack.HashedModuleIdsPlugin(),
// This must come after HashedModuleIdsPlugin (it sets any modules that
// were missed by HashedModuleIdsPlugin)
!dev && selectivePageBuilding && new AllModulesIdentifiedPlugin(dir),
// This sets chunk ids to be hashed versions of their names to reduce
// bundle churn
!dev && new HashedChunkIdsPlugin(buildId),
// On the client we want to share the same runtime cache
!isServer && selectivePageBuilding && new SharedRuntimePlugin(),
!dev && new webpack.IgnorePlugin({
checkResource: (resource: string) => {
return /react-is/.test(resource)
},
checkContext: (context: string) => {
return /next-server[\\/]dist[\\/]/.test(context) || /next[\\/]dist[\\/]/.test(context)
}
}),
target === 'serverless' && (isServer || selectivePageBuilding) && new ServerlessPlugin(buildId, { isServer }),
target !== 'serverless' && isServer && new PagesManifestPlugin(),
target !== 'serverless' && isServer && new NextJsSSRModuleCachePlugin({ outputPath }),
isServer && new NextJsSsrImportPlugin(),
!isServer && new BuildManifestPlugin(),
config.experimental.profiling && new webpack.debug.ProfilingPlugin({
outputPath: path.join(distDir, `profile-events-${isServer ? 'server' : 'client'}.json`)
})
].filter(Boolean as any as ExcludesFalse)
}
if (typeof config.webpack === 'function') {
webpackConfig = config.webpack(webpackConfig, { dir, dev, isServer, buildId, config, defaultLoaders, totalPages, webpack })
// @ts-ignore: Property 'then' does not exist on type 'Configuration'
if (typeof webpackConfig.then === 'function') {
console.warn('> Promise returned in next config. https://err.sh/zeit/next.js/promise-in-next-config.md')
}
}
// Backwards compat for `main.js` entry key
const originalEntry: any = webpackConfig.entry
if (typeof originalEntry !== 'undefined') {
webpackConfig.entry = async () => {
const entry: WebpackEntrypoints = typeof originalEntry === 'function' ? await originalEntry() : originalEntry
// Server compilation doesn't have main.js
if (clientEntries && entry['main.js'] && entry['main.js'].length > 0) {
const originalFile = clientEntries[CLIENT_STATIC_FILES_RUNTIME_MAIN]
entry[CLIENT_STATIC_FILES_RUNTIME_MAIN] = [
...entry['main.js'],
originalFile
]
}
delete entry['main.js']
return entry
}
}
return webpackConfig
}