packages are more generic

- if config is needed, it has a file in vars/
- all imported vars for pkgs are namespaced with _<pkgname>

tasks/pkgs/rust.yml

@@ -1,14 +1,10 @@
 ---
-- name: set rust_pkgs
-  set_fact:
-    rust_pkgs:
-      - rustc
-      - cargo
+- ansible.builtin.include_vars:
+    file: rust.yml
+    name: _rust
+
 - name: append to pkgs
   set_fact:
-    syspkgs: "{{ syspkgs + rust_pkgs }}"
+    syspkgs: "{{ syspkgs + _rust[ansible_system].pkgs }}"
   tags:
-    - RedHat
-    - linux
-    - package
-
+    - packages