[apt] Pin some packages from other versions

Signed-off-by: Yohann D'ANELLO <ynerant@crans.org>

group_vars/debian.yml

@@ -2,3 +2,5 @@
 glob_apt:
   mirror: "http://mirror.crans.org/"
   extra_repositories: []
+  pin:
+    bullseye: []

roles/apt/tasks/main.yml

@@ -25,3 +25,14 @@
     group: root
     mode: 0644
   loop: "{{ apt.extra_repositories }}"
+
+- name: Configure pin from future distributions
+  template:
+    src: "apt/{{ item[0] }}.d/pin.list.j2"
+    dest: "/etc/apt/{{ item[0] }}.d/{{ item[1].key }}.list"
+    owner: root
+    group: root
+    mode: 0644
+  with_nested:
+    - ["sources.list", "preferences"]
+    - "{{ apt.pin|dict2items }}"

roles/apt/templates/apt/preferences.d/pin.list.j2

@@ -0,0 +1,12 @@
+{{ ansible_header | comment }}
+
+
+Package: *
+Pin: release n={{ item[1].key }}
+Pin-Priority: 1
+{% for package in item[1].value -%}
+
+Package: {{ package }}
+Pin: release n={{ item[1].key }}
+Pin-Priority: 900
+{% endfor -%}

roles/apt/templates/apt/sources.list.d/pin.list.j2

@@ -0,0 +1,3 @@
+{{ ansible_header | comment }}
+
+deb {{ apt.mirror }}debian {{ item[1].key }} main contrib non-free