Nuxt/packages/webpack/src/builder.js

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import path from 'path'
import pify from 'pify'
import webpack from 'webpack'
import MFS from 'memory-fs'
import Glob from 'glob'
import webpackDevMiddleware from 'webpack-dev-middleware'
import webpackHotMiddleware from 'webpack-hot-middleware'
import consola from 'consola'
import {
parallel,
sequence,
wrapArray
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} from '@nuxt/utils'
import { ClientConfig, ModernConfig, ServerConfig } from './config'
import PerfLoader from './utils/perf-loader'
const glob = pify(Glob)
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export class WebpackBundler {
constructor(context) {
this.context = context
// Fields that set on build
this.compilers = []
this.compilersWatching = []
this.devMiddleware = {}
this.hotMiddleware = {}
// Initialize shared MFS for dev
if (this.context.options.dev) {
this.mfs = new MFS()
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// TODO: Enable when async FS required
// this.mfs.exists = function (...args) { return Promise.resolve(this.existsSync(...args)) }
// this.mfs.readFile = function (...args) { return Promise.resolve(this.readFileSync(...args)) }
}
}
async build() {
const options = this.context.options
const compilersOptions = []
// Client
const clientConfig = new ClientConfig(this).config()
compilersOptions.push(clientConfig)
// Modern
let modernConfig
if (options.modern) {
modernConfig = new ModernConfig(this).config()
compilersOptions.push(modernConfig)
}
// Server
let serverConfig = null
if (options.build.ssr) {
serverConfig = new ServerConfig(this).config()
compilersOptions.push(serverConfig)
}
for (const p of this.context.plugins) {
// Client config
if (!clientConfig.resolve.alias[p.name]) {
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clientConfig.resolve.alias[p.name] = p.mode === 'server' ? './empty.js' : p.src
}
// Server config
if (serverConfig && !serverConfig.resolve.alias[p.name]) {
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serverConfig.resolve.alias[p.name] = p.mode === 'client' ? './empty.js' : p.src
}
// Modern config
if (modernConfig && !modernConfig.resolve.alias[p.name]) {
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modernConfig.resolve.alias[p.name] = p.mode === 'client' ? './empty.js' : p.src
}
}
// Check styleResource existence
const styleResources = this.context.options.build.styleResources
if (styleResources && Object.keys(styleResources).length) {
consola.warn(
'Using styleResources without the nuxt-style-resources-module is not suggested and can lead to severe performance issues.',
'Please use https://github.com/nuxt-community/style-resources-module'
)
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for (const ext of Object.keys(styleResources)) {
await Promise.all(wrapArray(styleResources[ext]).map(async (p) => {
const styleResourceFiles = await glob(path.resolve(this.context.options.rootDir, p))
if (!styleResourceFiles || styleResourceFiles.length === 0) {
throw new Error(`Style Resource not found: ${p}`)
}
}))
}
}
// Configure compilers
this.compilers = compilersOptions.map((compilersOption) => {
const compiler = webpack(compilersOption)
// In dev, write files in memory FS
if (options.dev) {
compiler.outputFileSystem = this.mfs
}
return compiler
})
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// Warm up perfLoader before build
if (options.build.parallel) {
consola.info('Warming up worker pools')
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PerfLoader.warmupAll({ dev: options.dev })
consola.success('Worker pools ready')
}
// Start Builds
const runner = options.dev ? parallel : sequence
await runner(this.compilers, (compiler) => {
return this.webpackCompile(compiler)
})
}
async webpackCompile(compiler) {
const name = compiler.options.name
const { nuxt, options } = this.context
await nuxt.callHook('build:compile', { name, compiler })
// Load renderer resources after build
compiler.hooks.done.tap('load-resources', async (stats) => {
await nuxt.callHook('build:compiled', {
name,
compiler,
stats
})
// Reload renderer
await nuxt.callHook('build:resources', this.mfs)
})
// --- Dev Build ---
if (options.dev) {
// Client Build, watch is started by dev-middleware
if (['client', 'modern'].includes(name)) {
return new Promise((resolve, reject) => {
compiler.hooks.done.tap('nuxt-dev', () => resolve())
this.webpackDev(compiler)
})
}
// Server, build and watch for changes
return new Promise((resolve, reject) => {
const watching = compiler.watch(options.watchers.webpack, (err) => {
if (err) {
return reject(err)
}
watching.close = pify(watching.close)
this.compilersWatching.push(watching)
resolve()
})
})
}
// --- Production Build ---
compiler.run = pify(compiler.run)
const stats = await compiler.run()
if (stats.hasErrors()) {
if (options.build.quiet === true) {
return Promise.reject(stats.toString(options.build.stats))
} else {
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// Actual error will be printed by webpack
throw new Error('Nuxt Build Error')
}
}
}
webpackDev(compiler) {
consola.debug('Adding webpack middleware...')
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const name = compiler.options.name
const { nuxt: { server }, options } = this.context
// Create webpack dev middleware
this.devMiddleware[name] = pify(
webpackDevMiddleware(
compiler,
Object.assign(
{
publicPath: options.build.publicPath,
stats: false,
logLevel: 'silent',
watchOptions: options.watchers.webpack
},
options.build.devMiddleware
)
)
)
this.devMiddleware[name].close = pify(this.devMiddleware[name].close)
this.hotMiddleware[name] = pify(
webpackHotMiddleware(
compiler,
Object.assign(
{
log: false,
heartbeat: 10000
},
options.build.hotMiddleware,
{
path: `/__webpack_hmr/${name}`
}
)
)
)
// Inject to renderer instance
if (server) {
server.devMiddleware = this.devMiddleware
server.hotMiddleware = this.hotMiddleware
}
}
async unwatch() {
for (const watching of this.compilersWatching) {
await watching.close()
}
}
async close() {
if (this.__closed) {
return
}
this.__closed = true
// Unwatch
await this.unwatch()
// Stop webpack middleware
for (const devMiddleware of Object.values(this.devMiddleware)) {
await devMiddleware.close()
}
// Cleanup MFS
if (this.mfs) {
delete this.mfs.data
delete this.mfs
}
// Cleanup more resources
delete this.compilers
delete this.compilersWatching
delete this.devMiddleware
delete this.hotMiddleware
}
forGenerate() {
this.context.isStatic = true
}
}