now-cli/bin/now.js

#!/usr/bin/env node

// Native
const { resolve } = require('path')

// Packages
const updateNotifier = require('update-notifier')
const chalk = require('chalk')

// Check if the current path exists and throw and error
// if the user is trying to deploy a non-existing path!
// This needs to be done exactly in this place, because
// the utility imports are taking advantage of it
try {
  process.cwd()
} catch (err) {
  if (err.code === 'ENOENT' && err.syscall === 'uv_cwd') {
    console.log(`Current path doesn't exist!`)
  } else {
    console.log(err)
  }

  process.exit(1)
}

// Utilities
const pkg = require('../lib/pkg')

if (process.pkg) {
  const notifier = updateNotifier({ pkg })
  const update = notifier.update

  if (update) {
    let message = `Update available! ${chalk.red(
      update.current
    )} → ${chalk.green(update.latest)} \n`
    message += `${chalk.magenta(
      'Changelog:'
    )} https://github.com/zeit/now-cli/releases/tag/${update.latest}\n`

    if (pkg._npmPkg) {
      message += `Run ${chalk.magenta('npm i -g now')} to update!`
    } else {
      message += `Please download binaries from https://zeit.co/download`
    }

    notifier.notify({ message })
  }
}

// This command will be run if no other sub command is specified
const defaultCommand = 'deploy'

const commands = new Set([
  defaultCommand,
  'help',
  'list',
  'ls',
  'rm',
  'remove',
  'alias',
  'aliases',
  'ln',
  'domain',
  'domains',
  'dns',
  'cert',
  'certs',
  'secret',
  'secrets',
  'cc',
  'billing',
  'upgrade',
  'downgrade',
  'team',
  'teams',
  'switch',
  'log',
  'logs',
  'scale',
  'logout',
  'whoami'
])

const aliases = new Map([
  ['ls', 'list'],
  ['rm', 'remove'],
  ['ln', 'alias'],
  ['aliases', 'alias'],
  ['domain', 'domains'],
  ['cert', 'certs'],
  ['secret', 'secrets'],
  ['cc', 'billing'],
  ['downgrade', 'upgrade'],
  ['team', 'teams'],
  ['switch', 'teams switch'],
  ['log', 'logs']
])

let cmd = defaultCommand
let args = process.argv.slice(2)
const index = args.findIndex(a => commands.has(a))

if (index > -1) {
  cmd = args[index]
  args.splice(index, 1)

  if (cmd === 'help') {
    if (index < args.length && commands.has(args[index])) {
      cmd = args[index]
      args.splice(index, 1)
    } else {
      cmd = defaultCommand
    }

    args.unshift('--help')
  }

  cmd = aliases.get(cmd) || cmd
  if (cmd.includes(' ')) {
    const parts = cmd.split(' ')
    cmd = parts.shift()
    args = [].concat(parts, args)
  }
}

// Don't throw a useless error message when running `now help help`
// rather show the general help and be useful
if (cmd === 'help') {
  cmd = 'deploy'
} else if (cmd === defaultCommand && args[0] === 'login') {
  args[0] = '--login'
}

const bin = resolve(__dirname, 'now-' + cmd + '.js')

// Prepare process.argv for subcommand
process.argv = process.argv.slice(0, 2).concat(args)

// Load sub command
// With custom parameter to make "pkg" happy
require(bin, 'may-exclude')