---
  - name: Add PPA for Nginx.
    apt_repository: repo='ppa:nginx/{{ nginx_ppa_version }}' state=present update_cache=yes
    register: added_ppa
    when: nginx_use_ppa

  - name: ensure nginx is not installed when the ppa was just added
    apt:
      pkg: nginx
      state: absent
    when: added_ppa.changed