Nuxt/lib/core/nuxt.js

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import Module from 'module'
import { resolve, join } from 'path'
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import enableDestroy from 'server-destroy'
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import _ from 'lodash'
import fs from 'fs-extra'
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import consola from 'consola'
import chalk from 'chalk'
import esm from 'esm'
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import Options from '../common/options'
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import { sequence } from '../common/utils'
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import packageJSON from '../../package.json'
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import ModuleContainer from './module'
import Renderer from './renderer'
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export default class Nuxt {
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constructor(options = {}) {
this.options = Options.from(options)
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this.readyMessage = null
this.initialized = false
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// Hooks
this._hooks = {}
this.hook = this.hook.bind(this)
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// Create instance of core components
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this.moduleContainer = new ModuleContainer(this)
this.renderer = new Renderer(this)
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// Backward compatibility
this.render = this.renderer.app
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this.renderRoute = this.renderer.renderRoute.bind(this.renderer)
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this.renderAndGetWindow = this.renderer.renderAndGetWindow.bind(
this.renderer
)
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// ESM Loader
this.esm = esm(module, {})
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this._ready = this.ready().catch(err => {
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consola.fatal(err)
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})
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}
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static get version() {
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return packageJSON.version
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}
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async ready() {
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if (this._ready) {
return this._ready
}
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// Add hooks
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if (_.isPlainObject(this.options.hooks)) {
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this.addObjectHooks(this.options.hooks)
} else if (typeof this.options.hooks === 'function') {
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this.options.hooks(this.hook)
}
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// Await for modules
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await this.moduleContainer.ready()
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// Await for renderer to be ready
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await this.renderer.ready()
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this.initialized = true
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// Call ready hook
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await this.callHook('ready', this)
return this
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}
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hook(name, fn) {
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if (!name || typeof fn !== 'function') {
return
}
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this._hooks[name] = this._hooks[name] || []
this._hooks[name].push(fn)
}
async callHook(name, ...args) {
if (!this._hooks[name]) {
return
}
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consola.debug(`Call ${name} hooks (${this._hooks[name].length})`)
try {
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await sequence(this._hooks[name], fn => fn(...args))
} catch (err) {
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consola.error(err)
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this.callHook('error', err)
}
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}
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addObjectHooks(hooksObj) {
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Object.keys(hooksObj).forEach(name => {
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let hooks = hooksObj[name]
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hooks = Array.isArray(hooks) ? hooks : [hooks]
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hooks.forEach(hook => {
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this.hook(name, hook)
})
})
}
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showReady(clear = true) {
if (!this.readyMessage) {
return
}
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consola.ready({
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message: this.readyMessage,
badge: true,
clear
})
}
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listen(port = 3000, host = 'localhost') {
return this.ready().then(() => new Promise((resolve, reject) => {
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const server = this.renderer.app.listen(
{ port, host, exclusive: false },
err => {
/* istanbul ignore if */
if (err) {
return reject(err)
}
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const listenURL = chalk.underline.blue(`http://${host}:${port}`)
this.readyMessage = `Listening on ${listenURL}`
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// Close server on nuxt close
this.hook(
'close',
() =>
new Promise((resolve, reject) => {
// Destroy server by forcing every connection to be closed
server.destroy(err => {
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consola.debug('server closed')
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/* istanbul ignore if */
if (err) {
return reject(err)
}
resolve()
})
})
)
this.callHook('listen', server, { port, host }).then(resolve)
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}
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)
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// Add server.destroy(cb) method
enableDestroy(server)
}))
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}
resolveModule(path) {
try {
const resolvedPath = Module._resolveFilename(path, {
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paths: this.options.modulesDir
})
return resolvedPath
} catch (error) {
if (error.code === 'MODULE_NOT_FOUND') {
return null
} else {
throw error
}
}
}
resolveAlias(path) {
const modulePath = this.resolveModule(path)
// Try to resolve it as if it were a regular node_module
// Package first. Fixes issue with @<org> scoped packages
if (modulePath != null) {
return modulePath
}
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if (path.indexOf('@@') === 0 || path.indexOf('~~') === 0) {
return join(this.options.rootDir, path.substr(2))
}
if (path.indexOf('@') === 0 || path.indexOf('~') === 0) {
return join(this.options.srcDir, path.substr(1))
}
return resolve(this.options.srcDir, path)
}
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resolvePath(path) {
const _path = this.resolveAlias(path)
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if (fs.existsSync(_path)) {
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return _path
}
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for (let ext of this.options.extensions) {
if (fs.existsSync(_path + '.' + ext)) {
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return _path + '.' + ext
}
}
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throw new Error(`Cannot resolve "${path}" from "${_path}"`)
}
requireModule(_path, opts = {}) {
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const _resolvedPath = this.resolvePath(_path)
const m = opts.esm === false ? require(_resolvedPath) : this.esm(_resolvedPath)
return (m && m.default) || m
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}
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async close(callback) {
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await this.callHook('close', this)
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/* istanbul ignore if */
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if (typeof callback === 'function') {
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await callback()
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}
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}
}