buster-backports: preference 100

Author: areyer

files/etc/apt/preferences.d/buster_backports.pref

@@ -0,0 +1,3 @@
+Package:  *
+Pin:  release n=buster-backports*
+Pin-Priority:  100

tasks/main.yml

@@ -100,6 +100,17 @@
   set_fact:
     apt_update: True
   when: result.changed
+- name: backports get lower preference
+  copy:
+    src: etc/apt/preferences.d/buster_backports.pref
+    dest: /etc/apt/preferences.d/buster_backports.pref
+    mode: 0644
+  register: result
+  when: ansible_distribution_release == "buster"
+- name: set_apt_update
+  set_fact:
+    apt_update: True
+  when: result.changed
 - name: create /etc/apt/preferences.d
   file:
     state: directory