routeros_gen_upd_device_list.yml

---
- name: Generate device list which requires OS update
  hosts: routeros-devices
  gather_facts: no
  
  tasks: 
    - name: Check for updates
      routeros_command:
        commands:  /system package update check-for-updates

    - name: Print update status
      routeros_command:
        commands: /system package update print
 
      register: output
      
    - name: Parse command output
      set_fact:
        channel: "{{ output.stdout_lines[0][0].split(':')[1].lstrip() }}" 
        installed_version: "{{ output.stdout_lines[0][1].split(':')[1].lstrip() }}"
        latest_version: "{{ output.stdout_lines[0][2].split(':')[1].lstrip() }}"
        status: "{{ output.stdout_lines[0][3].split(':')[1].lstrip() }}"
     
    - name: Write device info to disk using a template
      copy:
        content: |
          #jinja2: lstrip_blocks: True
          Mikrotik OS version info:
            {% for host in groups['routeros-devices'] %}
                {% if ( ('System is already up to date' != hostvars[host].status) and (hostvars[host].channel == routeros_branch ) ) %}
            Hostname: {{ hostvars[host].inventory_hostname }}
            Installed-version: {{ hostvars[host].installed_version }}
            Latest-version: {{ hostvars[host].latest_version }}
               	{% elif hostvars[host].channel != routeros_branch %}
            Hostname: {{ hostvars[host].inventory_hostname }}
            Installed-version: {{ hostvars[host].installed_version }}
            Latest-version: {{ hostvars[host].latest_version }}
            WARNING!!!: "This OS version is not from {{ routeros_branch }} branch, it is {{ hostvars[host].channel }}"
                {% endif %}

            {% endfor %}
        dest: output/routeros_device_update.txt
      run_once: yes
...