Nuxt/lib/builder/builder.mjs

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import util from 'util'
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import path from 'path'
import fs from 'fs'
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import _ from 'lodash'
import chokidar from 'chokidar'
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import fsExtra from 'fs-extra'
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import hash from 'hash-sum'
import webpack from 'webpack'
import serialize from 'serialize-javascript'
import MFS from 'memory-fs'
import webpackDevMiddleware from 'webpack-dev-middleware'
import webpackHotMiddleware from 'webpack-hot-middleware'
import Debug from 'debug'
import Glob from 'glob'
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import upath from 'upath'
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import { r, wp, wChunk, createRoutes, parallel, relativeTo, waitFor, createSpinner } from '../common/utils'
import Options from '../common/options'
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import clientWebpackConfig from './webpack/client.config'
import serverWebpackConfig from './webpack/server.config'
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const debug = Debug('nuxt:build')
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debug.color = 2 // Force green color
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const glob = util.promisify(Glob)
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export default class Builder {
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constructor(nuxt) {
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this.nuxt = nuxt
this.isStatic = false // Flag to know if the build is for a generated app
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this.options = nuxt.options
// Fields that set on build
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this.compilers = []
this.compilersWatching = []
this.webpackDevMiddleware = null
this.webpackHotMiddleware = null
this.filesWatcher = null
this.customFilesWatcher = null
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this.spinner = createSpinner()
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this.spinner.enabled = !this.options.test
// Mute stats on dev
this.webpackStats = this.options.dev ? false : this.options.build.stats
// Helper to resolve build paths
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this.relativeToBuild = (...args) =>
relativeTo(this.options.buildDir, ...args)
this._buildStatus = STATUS.INITIAL
// Stop watching on nuxt.close()
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if (this.options.dev) {
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this.nuxt.hook('close', () => this.unwatch())
}
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// else {
// TODO: enable again when unsafe concern resolved.(common/options.js:42)
// this.nuxt.hook('build:done', () => this.generateConfig())
// }
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}
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get plugins() {
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return _.uniqBy(
this.options.plugins.map((p, i) => {
if (typeof p === 'string') p = { src: p }
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const pluginBaseName = path.basename(p.src, path.extname(p.src)).replace(
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/[^a-zA-Z?\d\s:]/g,
''
)
return {
src: this.nuxt.resolveAlias(p.src),
ssr: p.ssr !== false,
name: 'nuxt_plugin_' + pluginBaseName + '_' + hash(p.src)
}
}),
p => p.name
)
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}
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forGenerate() {
this.isStatic = true
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}
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async build() {
// Avoid calling build() method multiple times when dev:true
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/* istanbul ignore if */
if (this._buildStatus === STATUS.BUILD_DONE && this.options.dev) {
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return this
}
// If building
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/* istanbul ignore if */
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if (this._buildStatus === STATUS.BUILDING) {
await waitFor(1000)
return this.build()
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}
this._buildStatus = STATUS.BUILDING
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this.spinner.start('Initializing builder')
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// Wait for nuxt ready
await this.nuxt.ready()
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// Call before hook
await this.nuxt.callHook('build:before', this, this.options.build)
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// Check if pages dir exists and warn if not
this._nuxtPages = typeof this.options.build.createRoutes !== 'function'
if (this._nuxtPages) {
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if (!fsExtra.existsSync(path.join(this.options.srcDir, this.options.dir.pages))) {
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let dir = this.options.srcDir
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if (fsExtra.existsSync(path.join(this.options.srcDir, '..', this.options.dir.pages))) {
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throw new Error(
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`No \`${this.options.dir.pages}\` directory found in ${dir}. Did you mean to run \`nuxt\` in the parent (\`../\`) directory?`
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)
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} else {
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throw new Error(
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`Couldn't find a \`${this.options.dir.pages}\` directory in ${dir}. Please create one under the project root`
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)
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}
}
}
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this.spinner.succeed('Builder initialized')
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debug(`App root: ${this.options.srcDir}`)
// Create .nuxt/, .nuxt/components and .nuxt/dist folders
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await fsExtra.remove(r(this.options.buildDir))
await fsExtra.mkdirp(r(this.options.buildDir, 'components'))
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if (!this.options.dev) {
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await fsExtra.mkdirp(r(this.options.buildDir, 'dist'))
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}
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// Generate routes and interpret the template files
await this.generateRoutesAndFiles()
this.spinner.info('Starting webpack...')
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// Start webpack build
await this.webpackBuild()
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// Flag to set that building is done
this._buildStatus = STATUS.BUILD_DONE
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// Call done hook
await this.nuxt.callHook('build:done', this)
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return this
}
getBabelOptions({ isServer }) {
const options = _.clone(this.options.build.babel)
if (typeof options.presets === 'function') {
options.presets = options.presets({ isServer })
}
if (!options.babelrc && !options.presets) {
options.presets = [
[
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'babel-preset-vue-app',
{
targets: isServer ? { node: '8.0.0' } : { ie: 9, uglify: true }
}
]
]
}
return options
}
getFileName(name) {
let fileName = this.options.build.filenames[name]
// Don't use hashes when watching
// https://github.com/webpack/webpack/issues/1914#issuecomment-174171709
if (this.options.dev) {
fileName = fileName.replace(/\[(chunkhash|contenthash|hash)\]\./g, '')
}
return fileName
}
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async generateRoutesAndFiles() {
this.spinner.start(`Generating nuxt files...`)
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// -- Templates --
let templatesFiles = [
'App.js',
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'client.js',
'index.js',
'middleware.js',
'router.js',
'server.js',
'utils.js',
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'empty.js',
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'components/nuxt-error.vue',
'components/nuxt-loading.vue',
'components/nuxt-child.js',
'components/nuxt-link.js',
'components/nuxt.js',
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'components/no-ssr.js',
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'views/app.template.html',
'views/error.html'
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]
const templateVars = {
options: this.options,
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extensions: this.options.extensions
.map(ext => ext.replace(/^\./, ''))
.join('|'),
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messages: this.options.messages,
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splitPages: this.options.build.splitPages,
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uniqBy: _.uniqBy,
isDev: this.options.dev,
debug: this.options.debug,
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mode: this.options.mode,
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router: this.options.router,
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env: this.options.env,
head: this.options.head,
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middleware: fsExtra.existsSync(path.join(this.options.srcDir, this.options.dir.middleware)),
store: this.options.store,
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css: this.options.css,
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plugins: this.plugins,
appPath: './App.js',
ignorePrefix: this.options.ignorePrefix,
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layouts: Object.assign({}, this.options.layouts),
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loading:
typeof this.options.loading === 'string'
? this.relativeToBuild(this.options.srcDir, this.options.loading)
: this.options.loading,
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transition: this.options.transition,
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layoutTransition: this.options.layoutTransition,
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dir: this.options.dir,
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components: {
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ErrorPage: this.options.ErrorPage
? this.relativeToBuild(this.options.ErrorPage)
: null
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}
}
// -- Layouts --
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if (fsExtra.existsSync(path.resolve(this.options.srcDir, this.options.dir.layouts))) {
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const layoutsFiles = await glob(`${this.options.dir.layouts}/**/*.{vue,js}`, {
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cwd: this.options.srcDir,
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ignore: this.options.ignore
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})
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let hasErrorLayout = false
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layoutsFiles.forEach(file => {
let name = file
.split('/')
.slice(1)
.join('/')
.replace(/\.(vue|js)$/, '')
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if (name === 'error') {
hasErrorLayout = true
return
}
if (!templateVars.layouts[name] || /\.vue$/.test(file)) {
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templateVars.layouts[name] = this.relativeToBuild(
this.options.srcDir,
file
)
}
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})
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if (!templateVars.components.ErrorPage && hasErrorLayout) {
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templateVars.components.ErrorPage = this.relativeToBuild(
this.options.srcDir,
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`${this.options.dir.layouts}/error.vue`
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)
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}
}
// If no default layout, create its folder and add the default folder
if (!templateVars.layouts.default) {
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await fsExtra.mkdirp(r(this.options.buildDir, 'layouts'))
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templatesFiles.push('layouts/default.vue')
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templateVars.layouts.default = './layouts/default.vue'
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}
// -- Routes --
debug('Generating routes...')
// If user defined a custom method to create routes
if (this._nuxtPages) {
// Use nuxt.js createRoutes bases on pages/
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const files = {}
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;(await glob(`${this.options.dir.pages}/**/*.{vue,js}`, {
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cwd: this.options.srcDir,
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ignore: this.options.ignore
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})).forEach(f => {
const key = f.replace(/\.(js|vue)$/, '')
if (/\.vue$/.test(f) || !files[key]) {
files[key] = f.replace(/(['|"])/g, '\\$1')
}
})
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templateVars.router.routes = createRoutes(
Object.values(files),
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this.options.srcDir,
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this.options.dir.pages
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)
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} else {
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templateVars.router.routes = this.options.build.createRoutes(
this.options.srcDir
)
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}
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await this.nuxt.callHook(
'build:extendRoutes',
templateVars.router.routes,
r
)
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// router.extendRoutes method
if (typeof this.options.router.extendRoutes === 'function') {
// let the user extend the routes
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const extendedRoutes = this.options.router.extendRoutes(
templateVars.router.routes,
r
)
// Only overwrite routes when something is returned for backwards compatibility
if (extendedRoutes !== undefined) {
templateVars.router.routes = extendedRoutes
}
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}
// Make routes accessible for other modules and webpack configs
this.routes = templateVars.router.routes
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// -- Store --
// Add store if needed
if (this.options.store) {
templatesFiles.push('store.js')
}
// Resolve template files
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const customTemplateFiles = this.options.build.templates.map(
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t => t.dst || path.basename(t.src || t)
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)
templatesFiles = templatesFiles
.map(file => {
// Skip if custom file was already provided in build.templates[]
if (customTemplateFiles.indexOf(file) !== -1) {
return
}
// Allow override templates using a file with same name in ${srcDir}/app
const customPath = r(this.options.srcDir, 'app', file)
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const customFileExists = fsExtra.existsSync(customPath)
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return {
src: customFileExists ? customPath : r(this.options.nuxtAppDir, file),
dst: file,
custom: customFileExists
}
})
.filter(i => !!i)
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// -- Custom templates --
// Add custom template files
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templatesFiles = templatesFiles.concat(
this.options.build.templates.map(t => {
return Object.assign(
{
src: r(this.options.srcDir, t.src || t),
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dst: t.dst || path.basename(t.src || t),
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custom: true
},
t
)
})
)
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// -- Loading indicator --
if (this.options.loadingIndicator.name) {
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const indicatorPath1 = path.resolve(
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this.options.nuxtAppDir,
'views/loading',
this.options.loadingIndicator.name + '.html'
)
const indicatorPath2 = this.nuxt.resolveAlias(
this.options.loadingIndicator.name
)
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const indicatorPath = fsExtra.existsSync(indicatorPath1)
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? indicatorPath1
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: fsExtra.existsSync(indicatorPath2) ? indicatorPath2 : null
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if (indicatorPath) {
templatesFiles.push({
src: indicatorPath,
dst: 'loading.html',
options: this.options.loadingIndicator
})
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} else {
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/* istanbul ignore next */
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// eslint-disable-next-line no-console
console.error(
`Could not fetch loading indicator: ${
this.options.loadingIndicator.name
}`
)
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}
}
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await this.nuxt.callHook('build:templates', {
templatesFiles,
templateVars,
resolve: r
})
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// Interpret and move template files to .nuxt/
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await Promise.all(
templatesFiles.map(async ({ src, dst, options, custom }) => {
// Add template to watchers
this.options.build.watch.push(src)
// Render template to dst
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const fileContent = await fsExtra.readFile(src, 'utf8')
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let content
try {
const template = _.template(fileContent, {
imports: {
serialize,
hash,
r,
wp,
wChunk,
resolvePath: this.nuxt.resolvePath.bind(this.nuxt),
resolveAlias: this.nuxt.resolveAlias.bind(this.nuxt),
relativeToBuild: this.relativeToBuild
}
})
content = template(
Object.assign({}, templateVars, {
options: options || {},
custom,
src,
dst
})
)
} catch (err) {
/* istanbul ignore next */
throw new Error(`Could not compile template ${src}: ${err.message}`)
}
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const _path = r(this.options.buildDir, dst)
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// Ensure parent dir exits
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await fsExtra.mkdirp(path.dirname(_path))
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// Write file
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await fsExtra.writeFile(_path, content, 'utf8')
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})
)
this.spinner.succeed('Nuxt files generated')
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}
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async webpackBuild() {
debug('Building files...')
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const compilersOptions = []
// Client
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const clientConfig = clientWebpackConfig.call(this)
compilersOptions.push(clientConfig)
// Server
let serverConfig = null
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if (this.options.build.ssr) {
serverConfig = serverWebpackConfig.call(this)
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compilersOptions.push(serverConfig)
}
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// Alias plugins to their real path
this.plugins.forEach(p => {
const src = this.relativeToBuild(p.src)
// Client config
if (!clientConfig.resolve.alias[p.name]) {
clientConfig.resolve.alias[p.name] = src
}
// Server config
if (serverConfig && !serverConfig.resolve.alias[p.name]) {
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// Alias to noop for ssr:false plugins
serverConfig.resolve.alias[p.name] = p.ssr ? src : './empty.js'
}
})
// Initialize shared FS and Cache
const sharedFS = this.options.dev && new MFS()
// Initialize compilers
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this.compilers = compilersOptions.map(compilersOption => {
const compiler = webpack(compilersOption)
// In dev, write files in memory FS
if (sharedFS) {
compiler.outputFileSystem = sharedFS
}
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return compiler
})
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// Start Builds
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await parallel(
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this.compilers,
compiler =>
new Promise(async (resolve, reject) => {
const name = compiler.options.name
await this.nuxt.callHook('build:compile', { name, compiler })
// Resolve only when compiler emit done event
compiler.hooks.done.tap('load-resources', async stats => {
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await this.nuxt.callHook('build:compiled', {
name,
compiler,
stats
})
// Reload renderer if available
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this.nuxt.renderer.loadResources(sharedFS || fs)
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// Resolve on next tick
process.nextTick(resolve)
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})
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// --- Dev Build ---
if (this.options.dev) {
// Client Build, watch is started by dev-middleware
if (compiler.options.name === 'client') {
return this.webpackDev(compiler)
}
// Server, build and watch for changes
this.compilersWatching.push(
compiler.watch(this.options.watchers.webpack, err => {
/* istanbul ignore if */
if (err) return reject(err)
})
)
return
}
// --- Production Build ---
compiler.run((err, stats) => {
/* istanbul ignore if */
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if (err) {
console.error(err) // eslint-disable-line no-console
return reject(err)
}
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resolve()
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})
})
)
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}
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webpackDev(compiler) {
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debug('Adding webpack middleware...')
// Create webpack dev middleware
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this.webpackDevMiddleware = util.promisify(
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webpackDevMiddleware(
compiler,
Object.assign(
{
publicPath: this.options.build.publicPath,
stats: this.webpackStats,
logLevel: 'silent',
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watchOptions: this.options.watchers.webpack
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},
this.options.build.devMiddleware
)
)
)
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this.webpackDevMiddleware.close = util.promisify(this.webpackDevMiddleware.close)
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this.webpackHotMiddleware = util.promisify(
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webpackHotMiddleware(
compiler,
Object.assign(
{
log: false,
heartbeat: 10000
},
this.options.build.hotMiddleware
)
)
)
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// Inject to renderer instance
if (this.nuxt.renderer) {
this.nuxt.renderer.webpackDevMiddleware = this.webpackDevMiddleware
this.nuxt.renderer.webpackHotMiddleware = this.webpackHotMiddleware
}
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// Start watching files
this.watchFiles()
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}
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watchFiles() {
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const src = this.options.srcDir
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let patterns = [
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r(src, this.options.dir.layouts),
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r(src, this.options.dir.store),
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r(src, this.options.dir.middleware),
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r(src, `${this.options.dir.layouts}/*.{vue,js}`),
r(src, `${this.options.dir.layouts}/**/*.{vue,js}`)
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]
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if (this._nuxtPages) {
patterns.push(
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r(src, this.options.dir.pages),
r(src, `${this.options.dir.pages}/*.{vue,js}`),
r(src, `${this.options.dir.pages}/**/*.{vue,js}`)
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)
}
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patterns = _.map(patterns, p => upath.normalizeSafe(p))
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const options = Object.assign({}, this.options.watchers.chokidar, {
ignoreInitial: true
})
/* istanbul ignore next */
const refreshFiles = _.debounce(() => this.generateRoutesAndFiles(), 200)
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// Watch for src Files
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this.filesWatcher = chokidar
.watch(patterns, options)
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.on('add', refreshFiles)
.on('unlink', refreshFiles)
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// Watch for custom provided files
let customPatterns = _.concat(
this.options.build.watch,
..._.values(_.omit(this.options.build.styleResources, ['options']))
)
customPatterns = _.map(_.uniq(customPatterns), p =>
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upath.normalizeSafe(p)
)
this.customFilesWatcher = chokidar
.watch(customPatterns, options)
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.on('change', refreshFiles)
}
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async unwatch() {
if (this.filesWatcher) {
this.filesWatcher.close()
}
if (this.customFilesWatcher) {
this.customFilesWatcher.close()
}
this.compilersWatching.forEach(watching => watching.close())
// Stop webpack middleware
await this.webpackDevMiddleware.close()
}
// TODO: remove ignore when generateConfig enabled again
async generateConfig() /* istanbul ignore next */ {
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const config = path.resolve(this.options.buildDir, 'build.config.js')
const options = _.omit(this.options, Options.unsafeKeys)
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await fsExtra.writeFile(
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config,
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`export default ${JSON.stringify(options, null, ' ')}`,
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'utf8'
)
}
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}
const STATUS = {
INITIAL: 1,
BUILD_DONE: 2,
BUILDING: 3
}