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next.js/build/webpack.js
2018-08-30 12:27:22 +02:00

288 lines
9.6 KiB
JavaScript

// @flow
import type {NextConfig} from '../server/config'
import path from 'path'
import webpack from 'webpack'
import resolve from 'resolve'
import CaseSensitivePathPlugin from 'case-sensitive-paths-webpack-plugin'
import WriteFilePlugin from 'write-file-webpack-plugin'
import FriendlyErrorsWebpackPlugin from 'friendly-errors-webpack-plugin'
import WebpackBar from 'webpackbar'
import {getPages} from './webpack/utils'
import PagesPlugin from './webpack/plugins/pages-plugin'
import NextJsSsrImportPlugin from './webpack/plugins/nextjs-ssr-import'
import NextJsSSRModuleCachePlugin from './webpack/plugins/nextjs-ssr-module-cache'
import NextJsRequireCacheHotReloader from './webpack/plugins/nextjs-require-cache-hot-reloader'
import UnlinkFilePlugin from './webpack/plugins/unlink-file-plugin'
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, NEXT_PROJECT_ROOT, NEXT_PROJECT_ROOT_NODE_MODULES, NEXT_PROJECT_ROOT_DIST, DEFAULT_PAGES_DIR, REACT_LOADABLE_MANIFEST, CLIENT_STATIC_FILES_RUNTIME_WEBPACK, CLIENT_STATIC_FILES_RUNTIME_MAIN} from '../lib/constants'
import AutoDllPlugin from 'autodll-webpack-plugin'
// The externals config makes sure that
// on the server side when modules are
// in node_modules they don't get compiled by webpack
function externalsConfig (dir, isServer) {
const externals = []
if (!isServer) {
return externals
}
externals.push((context, request, callback) => {
resolve(request, { basedir: dir, preserveSymlinks: true }, (err, res) => {
if (err) {
return callback()
}
// Default pages have to be transpiled
if (res.match(/node_modules[/\\]next[/\\]dist[/\\]pages/)) {
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()
}
if (res.match(/node_modules[/\\].*\.js$/)) {
return callback(null, `commonjs ${request}`)
}
callback()
})
})
return externals
}
function optimizationConfig ({dir, dev, isServer, totalPages}) {
if (isServer) {
return {
splitChunks: false,
minimize: false
}
}
const config: any = {
runtimeChunk: {
name: CLIENT_STATIC_FILES_RUNTIME_WEBPACK
},
splitChunks: {
cacheGroups: {
default: false,
vendors: false
}
}
}
if (dev) {
return config
}
// Only enabled in production
// This logic will create a commons bundle
// with modules that are used in 50% of all pages
config.splitChunks.chunks = 'all'
config.splitChunks.cacheGroups.commons = {
name: 'commons',
chunks: 'all',
minChunks: totalPages > 2 ? totalPages * 0.5 : 2
}
return config
}
type BaseConfigContext = {|
dev: boolean,
isServer: boolean,
buildId: string,
config: NextConfig
|}
export default async function getBaseWebpackConfig (dir: string, {dev = false, isServer = false, buildId, config}: BaseConfigContext) {
const defaultLoaders = {
babel: {
loader: 'next-babel-loader',
options: {dev, isServer}
},
hotSelfAccept: {
loader: 'hot-self-accept-loader',
options: {
include: [
path.join(dir, 'pages')
],
// All pages are javascript files. So we apply hot-self-accept-loader here to facilitate hot reloading of pages.
// This makes sure plugins just have to implement `pageExtensions` instead of also implementing the loader
extensions: new RegExp(`\\.+(${config.pageExtensions.join('|')})$`)
}
}
}
// Support for NODE_PATH
const nodePathList = (process.env.NODE_PATH || '')
.split(process.platform === 'win32' ? ';' : ':')
.filter((p) => !!p)
const outputPath = path.join(dir, config.distDir, isServer ? SERVER_DIRECTORY : '')
const pagesEntries = await getPages(dir, {nextPagesDir: DEFAULT_PAGES_DIR, dev, buildId, isServer, pageExtensions: config.pageExtensions.join('|')})
const totalPages = Object.keys(pagesEntries).length
const clientEntries = !isServer ? {
// Backwards compatibility
'main.js': [],
[CLIENT_STATIC_FILES_RUNTIME_MAIN]: [
path.join(NEXT_PROJECT_ROOT_DIST, 'client', (dev ? `next-dev` : 'next'))
].filter(Boolean)
} : {}
const resolveConfig = {
extensions: ['.wasm', '.mjs', '.js', '.jsx', '.json'],
modules: [
NEXT_PROJECT_ROOT_NODE_MODULES,
'node_modules',
...nodePathList // Support for NODE_PATH environment variable
],
alias: {
next: NEXT_PROJECT_ROOT
}
}
const webpackMode = dev ? 'development' : 'production'
let webpackConfig = {
mode: webpackMode,
devtool: dev ? 'cheap-module-source-map' : false,
name: isServer ? 'server' : 'client',
cache: true,
target: isServer ? 'node' : 'web',
externals: externalsConfig(dir, isServer),
optimization: optimizationConfig({dir, dev, isServer, totalPages}),
recordsPath: path.join(outputPath, 'records.json'),
context: dir,
// Kept as function to be backwards compatible
entry: async () => {
return {
...clientEntries,
// Only _error and _document when in development. The rest is handled by on-demand-entries
...pagesEntries
}
},
output: {
path: outputPath,
filename: ({chunk}) => {
// Use `[name]-[contenthash].js` in production
if (!dev && (chunk.name === CLIENT_STATIC_FILES_RUNTIME_MAIN || chunk.name === CLIENT_STATIC_FILES_RUNTIME_WEBPACK)) {
return chunk.name.replace(/\.js$/, '-[contenthash].js')
}
return '[name]'
},
libraryTarget: 'commonjs2',
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 ? `${dev ? '[name]' : '[contenthash]'}.js` : `static/chunks/${dev ? '[name]' : '[contenthash]'}.js`,
strictModuleExceptionHandling: true
},
performance: { hints: false },
resolve: resolveConfig,
resolveLoader: {
modules: [
NEXT_PROJECT_ROOT_NODE_MODULES,
'node_modules',
path.join(__dirname, 'webpack', 'loaders'), // The loaders Next.js provides
...nodePathList // Support for NODE_PATH environment variable
]
},
module: {
rules: [
dev && !isServer && {
test: defaultLoaders.hotSelfAccept.options.extensions,
include: defaultLoaders.hotSelfAccept.options.include,
use: defaultLoaders.hotSelfAccept
},
{
test: /\.(js|jsx)$/,
include: [dir],
exclude: /node_modules/,
use: defaultLoaders.babel
}
].filter(Boolean)
},
plugins: [
// Precompile react / react-dom for development, speeding up webpack
dev && !isServer && new AutoDllPlugin({
filename: '[name]_[hash].js',
path: './static/dll',
context: dir,
entry: {
dll: [
'react',
'react-dom'
]
},
config: {
mode: webpackMode,
resolve: resolveConfig
}
}),
// This plugin makes sure `output.filename` is used for entry chunks
new ChunkNamesPlugin(),
!isServer && new ReactLoadablePlugin({
filename: REACT_LOADABLE_MANIFEST
}),
new WebpackBar({
name: isServer ? 'server' : 'client'
}),
dev && !isServer && new FriendlyErrorsWebpackPlugin(),
new webpack.IgnorePlugin(/(precomputed)/, /node_modules.+(elliptic)/),
// 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
dev && new NextJsRequireCacheHotReloader(),
dev && !isServer && new webpack.HotModuleReplacementPlugin(),
dev && new webpack.NoEmitOnErrorsPlugin(),
dev && new UnlinkFilePlugin(),
dev && new CaseSensitivePathPlugin(), // Since on macOS the filesystem is case-insensitive this will make sure your path are case-sensitive
dev && new WriteFilePlugin({
exitOnErrors: false,
log: false,
// required not to cache removed files
useHashIndex: false
}),
new webpack.DefinePlugin({
'process.env.NODE_ENV': JSON.stringify(dev ? 'development' : 'production')
}),
!dev && new webpack.optimize.ModuleConcatenationPlugin(),
isServer && new PagesManifestPlugin(),
!isServer && new BuildManifestPlugin(),
!isServer && new PagesPlugin(),
isServer && new NextJsSsrImportPlugin(),
isServer && new NextJsSSRModuleCachePlugin({outputPath})
].filter(Boolean)
}
if (typeof config.webpack === 'function') {
webpackConfig = config.webpack(webpackConfig, {dir, dev, isServer, buildId, config, defaultLoaders, totalPages})
}
// Backwards compat for `main.js` entry key
const originalEntry = webpackConfig.entry
webpackConfig.entry = async () => {
const entry: any = {...await originalEntry()}
// Server compilation doesn't have main.js
if (typeof entry['main.js'] !== 'undefined') {
entry[CLIENT_STATIC_FILES_RUNTIME_MAIN] = [
...entry['main.js'],
...entry[CLIENT_STATIC_FILES_RUNTIME_MAIN]
]
delete entry['main.js']
}
return entry
}
return webpackConfig
}