Custom salt state to make sure the computer name is set correctly.

mac_system.py

# -*- coding: utf-8 -*-
'''
State for setting computer names on macOS.

.. code-block:: yaml
	set_computer_name_to_wesbook:
	  system.set_computer_name:
		- name: wesbook
'''

import salt.utils.platform
import logging

log = logging.getLogger(__name__)


__virtualname__ = 'system'


def __virtual__():
	if salt.utils.platform.is_darwin():
		return __virtualname__

	return (False, 'states.mac_system is only available on macOS.')


def set_computer_name(name):
	'''
	Make sure a system computer name is set.

	name
		The name of the macOS computer name you wish to make sure is set.
	'''

	ret = {'name': name,
		   'result': True,
		   'changes': {},
		   'comment': ''}

	# get our current catalog value.
	old_name = __salt__['system.get_computer_name']()

	# check if we are set correctly
	if old_name == name:
		ret['comment'] = 'system computer_name is already set correctly.'
		return ret

	# we are not set correctly so we need set it.
	set_computer_name = __salt__['system.set_computer_name'](name)

	if not set_computer_name:
		ret['result'] = False
		ret['comment'] = 'Failed to set system'\
			'computer name "{0}"'.format(name)
	else:
		ret['comment'] = 'Successfully set system '\
			'computer name to "{0}"'.format(name)
		ret['changes'].update({'ComputerName': {'old': old_name,
									  	   		'new': name}})
	return ret

set_computname.sls

set_computer_name_to_wesbook:
  system.set_computer_name:
    - name: wesbook
    
set_computer_name_to_serialnumber-wesbook:
  system.set_computer_name:
    - name: {{ grains['system_serialnumber'] }}-wesbook