- hosts: localhost
  connection: local
  become: true
  tasks:
    - name: load package list
      include_vars:
        file: packages.yml

    - set_fact:
        distro: "{{ ansible_distribution|lower }}"

    - set_fact:
        defined_packages: "{{ packages|json_query('keys(list)') }}"

    - set_fact:
        distro_packages: "{{ packages|json_query('list.*.%s'|format(distro)) }}"

    - name: check list
      assert:
        that: "defined_packages|length == distro_packages|length"

    - name: install packages
      package:
        name: "{{ packages|json_query(query) }}"
        state: installed
      vars:
        query: "{{ 'list.*.%s[]'|format(distro) }}"