fix(vars): move OS-specific vars to separate files

Ref: https://adfinis.github.io/ansible-guide/roles_collections.html#variables

tasks/main.yml

@@ -1,10 +1,16 @@
 ---
 # tasks file for bareos_sd
 
+- name: Include OS-specific vars
+  ansible.builtin.include_vars: "{{ item }}"
+  with_first_found:
+    - "{{ ansible_facts.distribution }}_{{ ansible_facts.distribution_major_version }}.yml"
+    - "{{ ansible_facts.os_family }}.yml"
+
 - name: Import assert.yml
   ansible.builtin.import_tasks:
     file: assert.yml
-  run_once: yes
+  run_once: true
   delegate_to: localhost
 
 - name: Install packages

vars/Debian.yml

@@ -0,0 +1,5 @@
+---
+
+bareos_sd_debug_packages:
+  - bareos-dbg
+  - gdb

vars/main.yml

@@ -5,15 +5,6 @@ bareos_sd_packages:
   - bareos-storage
   - bareos-storage-tape
 
-# A map to define the packages to install for debugging.
-_bareos_sd_debug_packages:
-  default:
-    - bareos-storage-debuginfo
-    - gdb
-  Debian:
-    - bareos-dbg
-    - gdb
-  RedHat-7:
-    - bareos-debuginfo
-    - gdb
-bareos_sd_debug_packages: "{{ _bareos_sd_debug_packages[ansible_os_family ~ '-' ~ ansible_distribution_major_version] | default(_bareos_sd_debug_packages[ansible_os_family] | default(_bareos_sd_debug_packages['default'])) }}"
+bareos_sd_debug_packages:
+  - bareos-storage-debuginfo
+  - gdb