prerequis.yml

# ansible-playbook -i ./inventory/preprod/ ./prerequit.yml
---
# Installe python et python-apt pour le bon fonctionnement d'Ansible

- hosts: all
  remote_user: root
  gather_facts: false # on ne collecte pas les facts car il faut python 2 d'installé sur les serveurs distants

  tasks:
    # to be able to remove ansible-lint warning on non-needed changes/tasks (only install python-apt when required):
    - name: "check whether python-apt is installed or not"
      raw: "dpkg -l 'python-apt' | grep '^ii'"
      register: is_python_apt_installed
      changed_when: False
      failed_when: False

    #- name: "debug"
    #  debug: var=is_python_apt_installed

    # install python-apt when required:
    - name: "install python-apt"
      raw: apt-get -y install python python-apt  # une commande raw, exécutée directement en shell sur le serveur distant via ssh
      when: is_python_apt_installed.stdout.find('python-apt') == -1