docs: def list_domains():
      '''
      Return a list of the salt_id names of all available Vagrant VMs on
      this host without regard to the path where they are defined.
  
      CLI Example:
  
      .. code-block:: bash
  
          salt '*' vagrant.list_domains --log-level=info
  
      The log shows information about all known Vagrant environments
      on this machine. This data is cached and may not be completely
      up-to-date.
      '''
      vms = []
      cmd = 'vagrant global-status'
      reply = __salt__['cmd.shell'](cmd)
      log.info('--->\n%s', reply)
      for line in reply.split('\n'):  # build a list of the text reply
          tokens = line.strip().split()
          try:
              _ = int(tokens[0], 16)  # valid id numbers are hexadecimal
          except (ValueError, IndexError):
              continue  # skip lines without valid id numbers
          machine = tokens[1]
          cwd = tokens[-1]
          name = get_machine_id(machine, cwd)
          if name:
              vms.append(name)
      return vms