---
- name: "list previous host configs"
  shell: ls -1 /etc/icinga2/conf.d/ansible_routeros/ | sed -e 's/\.[^\.]*$//'
  register: previous_hosts
  changed_when: false

- name: "create conf file for each host"
  template: src="host" dest="/etc/icinga2/conf.d/ansible_routeros/{{ item }}.conf"
  with_items: "{{ hostlist }}"
  notify:
    - reload icinga2

- name: "remove stale hosts"
  file: path="/etc/icinga2/conf.d/ansible_routeros/{{ item }}.conf" state=absent
  with_items: "{{ previous_hosts.stdout_lines }}"
  when: hostvars[item] is undefined
  notify:
    - reload icinga2