Add/update roles; test with Debian Stretch and Buster

roles/core/tasks/mirrors.yml

@@ -1,4 +1,10 @@
 ---
+
+- name: Correct ansible_distribution_release for Debian Buster
+  when: ansible_distribution == 'Debian' and ansible_distribution_version == 'buster/sid'
+  set_fact:
+    ansible_distribution_release: buster
+
 - name: Configure /etc/apt/sources.list
   template:
     src: '{{ ansible_distribution | lower}}.sources.list'

roles/core/templates/debian.sources.list

@@ -0,0 +1,9 @@
+deb http://mirror.csclub.uwaterloo.ca/debian/ {{ ansible_distribution_release }} main non-free contrib
+deb-src http://mirror.csclub.uwaterloo.ca/debian/ {{ ansible_distribution_release }} main non-free contrib
+
+deb http://mirror.csclub.uwaterloo.ca/debian-security/ {{ ansible_distribution_release }}/updates main contrib non-free
+deb-src http://mirror.csclub.uwaterloo.ca/debian-security/ {{ ansible_distribution_release }}/updates main contrib non-free
+
+# {{ ansible_distribution_release }}-updates, previously known as 'volatile'
+deb http://mirror.csclub.uwaterloo.ca/debian/ {{ ansible_distribution_release }}-updates main contrib non-free
+deb-src http://mirror.csclub.uwaterloo.ca/debian/ {{ ansible_distribution_release }}-updates main contrib non-free