ansible-keycloak/roles/keycloak/tasks/fastpackages.yml

---
- name: Check packages to be installed
  block:
  - name: "Check if packages are already installed"
    ansible.builtin.command: "dpkg -s {{ packages_list | join(' ') }}"
    args:
      warn: no
    register: dpkg_info
    changed_when: dpkg_info.failed

  rescue:
    - name: "Add missing packages to the apt install list"
      ansible.builtin.set_fact:
        packages_to_install: "{{ packages_to_install | default([]) + dpkg_info.stdout_lines | map('regex_findall', 'package (.+) is not installed and no information is available$') | flatten }}"
      when: rpm_info.failed

- name: Install packages
  become: yes
  ansible.builtin.apt:
    name: "{{ packages_to_install }}"
    state: present
  when: packages_to_install | default([]) | length > 0