---
- name: Update packages list
  apt: update_cache=yes

- name: List packages to upgrade (1/2)
  command: aptitude -q -F%p --disable-columns search "~U"
  register: updates
  changed_when: False
  failed_when: updates.rc != 0 and updates.rc != 1

- name: List packages to upgrade (2/2)
  debug: msg="{{ updates.stdout_lines | count }} packages to upgrade ({{ updates.stdout_lines | join(', ') }})"
  when: updates.stdout_lines

- name: Upgrade packages
  apt: upgrade=safe

- name: List services to restart (1/2)
  shell: checkrestart | grep ^service | awk '{print $2}'
  register: services
  changed_when: False

- name: List services to restart (2/2)
  debug: msg="{{ services.stdout_lines | count }} services to restart ({{ services.stdout_lines | join (', ') }})"
  when: services.stdout_lines

- name: clean apt-cache
  command: apt-get clean
  args:
    warn: False