- name: lookup debian version
  shell: cat /etc/debian_version
  register: debian_version

- name: outputs debian version
  debug:
    var: debian_version.stdout_lines

- name: update apt cache
  apt:
    update_cache: yes

- name: show updateable packages
  shell: apt-get -s dist-upgrade | grep Inst
  register: apt_upgrade_result
  changed_when: false
  failed_when: apt_upgrade_result.rc > 1

- name: outputs updatable packages
  debug:
    var: apt_upgrade_result.stdout_lines
  when: apt_upgrade_result.stdout_lines | length > 0

- name: mark server as "restart required" if necessary
  shell: "needrestart -b | grep -E 'NEEDRESTART-SESS|NEEDRESTART-SVC|NEEDRESTART-KSTA: 3'"
  register: restart_needed
  ignore_errors: yes
  changed_when: false
  failed_when: restart_needed.rc > 1
  tags: 
    - needrestart 
    - restart

- name: output "restart required"
  debug:
    var: restart_needed.stdout_lines
  when: restart_needed.stdout_lines | length > 0
  tags: needrestart