Nuxt/bin/nuxt-dev

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#!/usr/bin/env node
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// Show logs
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process.env.DEBUG = process.env.DEBUG || 'nuxt:*'
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const _ = require('lodash')
const debug = require('debug')('nuxt:build')
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debug.color = 2 // force green color
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const fs = require('fs')
const parseArgs = require('minimist')
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const { Nuxt, Builder } = require('../')
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const chokidar = require('chokidar')
const resolve = require('path').resolve
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const argv = parseArgs(process.argv.slice(2), {
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alias: {
h: 'help',
H: 'hostname',
p: 'port',
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c: 'config-file',
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s: 'spa',
u: 'universal'
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},
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boolean: ['h', 's', 'u'],
string: ['H', 'c'],
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default: {
c: 'nuxt.config.js'
}
})
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if (argv.hostname === '') {
console.error(`> Provided hostname argument has no value`)
process.exit(1)
}
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if (argv.help) {
console.log(`
Description
Starts the application in development mode (hot-code reloading, error
reporting, etc)
Usage
$ nuxt dev <dir> -p <port number> -H <hostname>
Options
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--port, -p A port number on which to start the application
--hostname, -H Hostname on which to start the application
--spa Launch in SPA mode
--universal Launch in Universal mode (default)
--config-file, -c Path to Nuxt.js config file (default: nuxt.config.js)
--help, -h Displays this message
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`)
process.exit(0)
}
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const rootDir = resolve(argv._[0] || '.')
const nuxtConfigFile = resolve(rootDir, argv['config-file'])
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// Load config once for chokidar
const nuxtConfig = loadNuxtConfig()
_.defaultsDeep(nuxtConfig, { watchers: { chokidar: { ignoreInitial: true } } })
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// Start dev
let dev = startDev()
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// Start watching for nuxt.config.js changes
chokidar
.watch(nuxtConfigFile, nuxtConfig.watchers.chokidar)
.on('all', _.debounce(() => {
debug('[nuxt.config.js] changed')
debug('Rebuilding the app...')
dev = dev.then(startDev)
}), 2500)
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function startDev (oldNuxt) {
// Get latest environment variables
const port = argv.port || process.env.PORT || process.env.npm_package_config_nuxt_port
const host = argv.hostname || process.env.HOST || process.env.npm_package_config_nuxt_host
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// Load options
let options = {}
try {
options = loadNuxtConfig()
} catch (err) {
console.error(err)
return // Wait for next reload
}
// Create nuxt and builder instance
const nuxt = new Nuxt(options)
const builder = new Builder(nuxt)
return Promise.resolve()
.then(() => builder.build()) // 1- Start build
.then(() => oldNuxt ? oldNuxt.close() : Promise.resolve()) // 2- Close old nuxt after successful build
.then(() => nuxt.listen(port, host)) // 3- Start listening
.then(() => nuxt) // 4- Pass new nuxt to watch chain
}
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function loadNuxtConfig () {
let options = {}
if (fs.existsSync(nuxtConfigFile)) {
delete require.cache[nuxtConfigFile]
options = require(nuxtConfigFile)
} else if (argv['config-file'] !== 'nuxt.config.js') {
console.error(`> Could not load config file ${argv['config-file']}`)
process.exit(1)
}
if (typeof options.rootDir !== 'string') {
options.rootDir = rootDir
}
// Force development mode for add hot reloading and watching changes
options.dev = true
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// Nuxt Mode
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options.mode = (argv['spa'] && 'spa') || (argv['universal'] && 'universal') || options.mode
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return options
}