code: function createDir (argv, next) {
    const loc = path.resolve(path.join(argv.d, argv.name))
    mkdirp(loc, function (err) {
      if (err) return next(err)
      process.chdir(loc)
      argv.directory = loc
      argv.d = loc
      next()
    })
  }
docs: create specified path (obj, fn) -> null