From 34ee94071359b7e0e18c1365730fda2aff634fd5 Mon Sep 17 00:00:00 2001
From: Oleg Broytman <phd@phdru.name>
Date: Sun, 28 Jul 2019 20:17:54 +0300
Subject: [PATCH] Fix(init-system): Overwrite `sources.list` only if it's
 brand-new

---
 playbooks/debian/roles/init-system/tasks/apt.yml | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/playbooks/debian/roles/init-system/tasks/apt.yml b/playbooks/debian/roles/init-system/tasks/apt.yml
index 3ea63a8..a24e44a 100644
--- a/playbooks/debian/roles/init-system/tasks/apt.yml
+++ b/playbooks/debian/roles/init-system/tasks/apt.yml
@@ -1,3 +1,12 @@
+- name: Check backports
+  shell: "grep -Fc backports /etc/apt/sources.list || :"
+  register: apt_configured
+  changed_when: apt_configured.stdout == "0"
+
+- debug:
+    msg: "apt has already been configured"
+  when: apt_configured.stdout != "0"
+
 - name: Configure apt
   become: true
   template:
@@ -6,7 +15,7 @@
     owner: root
     group: root
     mode: '0640'
-    force: no
+  when: apt_configured.stdout == "0"
 
 - name: Install minimal software packages
   become: true
-- 
2.39.5