packages.yml

- name: "Check for packages"
  hosts: "{{ hosts | default('localhost') }}"
  tasks:

  - name: Set command for Redhat
    set_fact:
      installed_package_cmd: "rpm -qa --qf '%{NAME}\n'"
      cron_package_name: "cronie"
    when:
      ansible_os_family == 'RedHat'
      
  - name: Set command for Debian
    set_fact:
      installed_package_cmd: "dpkg-query -f '${binary:Package}\n' -W"
      cron_package_name: "cron"
    when:
      ansible_os_family == 'Debian'
      
  - name: Set command for Alpine
    set_fact:
      installed_package_cmd: "apk info"
      cron_package_name: "cronie"
    when:
      ansible_os_family == 'Alpine'

  - name: Gather packages
    command: "{{ installed_package_cmd }}"
    register: commands

  - name: Dump commands
    debug:
      var: commands

  - name: Test for cron
    debug:
      msg: "cron is {{ 'available' if cron_package_name in commands.stdout_lines else 'not available' }}"