Add apt role

roles/apt/defaults/main.yml

@@ -0,0 +1,3 @@
+---
+apt_become: true
+apt_become_user: root

roles/apt/tasks/main.yml

@@ -0,0 +1,38 @@
+---
+
+- block:
+    - name: install source.list
+      ansible.builtin.copy:
+        dest: /etc/apt/sources.list
+        content: |
+          deb http://deb.debian.org/debian/ testing non-free contrib main
+          deb-src http://deb.debian.org/debian/ testing main contrib non-free
+          deb http://deb.debian.org/debian/ unstable main contrib non-free
+          deb-src http://deb.debian.org/debian/ unstable main contrib non-free
+          deb http://deb.debian.org/debian/ experimental main contrib non-free
+          # deb-src http://deb.debian.org/debian/ experimental main contrib non-free
+
+          # deb http://deb.debian.org/debian-debug/ testing-debug main
+          # deb http://deb.debian.org/debian-debug/ testing-proposed-updates-debug main
+          # deb http://deb.debian.org/debian-debug/ unstable-debug main
+          # deb http://deb.debian.org/debian-debug/ experimental-debug main
+
+          # Line commented out by installer because it failed to verify:
+          # deb http://security.debian.org/debian-security/ bullseye/updates main
+          # Line commented out by installer because it failed to verify:
+          # deb-src http://security.debian.org/debian-security/ bullseye/updates main
+
+    - name: install source.list
+      ansible.builtin.copy:
+        dest: /etc/apt/preferences
+        content: |
+          Package: *
+          Pin: release a=testing
+          Pin-Priority: 900
+
+          Package: *
+          Pin: release o=Debian
+          Pin-Priority: -1
+
+  become: "{{ apt_become }}"
+  become_user: "{{ apt_become_user }}"

tests/local-play.yml

@@ -5,6 +5,7 @@
 
   roles:
     - ../roles/alacritty
+    - ../roles/apt
     - ../roles/emacs
     - ../roles/fontconfig
     - ../roles/git