vue-cli/packages/@vue/cli/bin/vue

#!/usr/bin/env node

const chalk = require('chalk')
const semver = require('semver')
const { error } = require('@vue/cli-shared-utils')
const requiredVersion = require('../package.json').engines.node

if (!semver.satisfies(process.version, requiredVersion)) {
  error(
    `You are using Node ${process.version}, but this version of vue-cli ` +
    `requires Node ${requiredVersion}.\nPlease upgrade your Node version.`
  )
  process.exit(1)
}

const program = require('commander')
const loadCommand = require('../lib/util/loadCommand')

program
  .version(require('../package').version)
  .usage('<command> [options]')

program
  .command('create <app-name>')
  .description('create a new project powered by vue-cli-service')
  .action(require('../lib/create'))

program
  .command('init <template> <app-name>')
  .description('generate a project from a remote template (requires @vue/cli-init)')
  .action(() => {
    loadCommand('init', '@vue/cli-init')
  })

program
  .command('serve [filename]')
  .description('serve a .js or vue file in development mode with zero config')
  .action(filename => {
    loadCommand('serve', '@vue/cli-service-global').serve(filename)
  })

program
  .command('build [filename]')
  .description('build a .js or .vue file in production mode with zero config')
  .action(filename => {
    loadCommand('build', '@vue/cli-service-global').build(filename)
  })

program.on('--help', () => {
  console.log()
})

// customize missing arg messages
const formatArgs = ({ name, required }) => {
  return `${required ? '<' : '['}${name}${required ? '>' : ']'}`
}

program.Command.prototype.missingArgument = function (argName) {
  console.log()
  console.log(`  Missing required argument ${chalk.yellow(`<${argName}>`)}.`)
  console.log()
  console.log(`  Usage: vue ${this._name} ${this._args.map(formatArgs).join(' ')}`)
  console.log()
  process.exit(1)
}

program.parse(process.argv)

if (!process.argv.slice(2).length) {
  program.outputHelp()
}