message: Ask if the user really wants to add a subdomain as a domain
  Closes
diff: @@ -6,18 +6,20 @@ const { resolve } = require('path')
  // Packages
  const chalk = require('chalk')
  const minimist = require('minimist')
  -const table = require('text-table')
  const ms = require('ms')
  +const psl = require('psl')
  +const table = require('text-table')
  // Ours
  -const login = require('../lib/login')
  -const cfg = require('../lib/cfg')
  -const { error } = require('../lib/error')
  -const toHost = require('../lib/to-host')
  -const strlen = require('../lib/strlen')
  const NowDomains = require('../lib/domains')
  +const cfg = require('../lib/cfg')
  const exit = require('../lib/utils/exit')
  +const login = require('../lib/login')
  const logo = require('../lib/utils/output/logo')
  +const promptBool = require('../lib/utils/input/prompt-bool')
  +const strlen = require('../lib/strlen')
  +const toHost = require('../lib/to-host')
  +const { error } = require('../lib/error')
  const argv = minimist(process.argv.slice(2), {
  string: ['config', 'token'],
  @@ -283,9 +285,25 @@ async function run({ token, config: { currentTeam, user } }) {
  error('Invalid number of arguments')
  return exit(1)
  }
  + const name = String(args[0])
  +
  + const parsedDomain = psl.parse(name)
  + if (parsedDomain.subdomain) {
  + const msg =
  + `You are adding "${name}" as a domain name which seems to contain a subdomain part "${parsedDomain.subdomain}".\n` +
  + ' This is probably wrong unless you really know what you are doing.\n' +
  + ` To add the root domain instead please run: ${chalk.cyan(
  + 'now domain add ' +
  + (argv.external ? '-e ' : '') +
  + parsedDomain.domain
  + )}\n` +
  + ` Continue adding "${name}" as a domain name?`
  + if (!await promptBool(msg)) {
  + return exit(1)
  + }
  + }
  const start = new Date()
  - const name = String(args[0])
  const { uid, code, created, verified } = await domain.add(
  name,
  argv.force,
  