From e2dcda4a81ffbfb50a1f8e0bd7aa554738b5f49a Mon Sep 17 00:00:00 2001
From: Raphael Kastner <raphael.kastner@hetzner.com>
Date: Mon, 28 Oct 2019 14:10:56 +0100
Subject: [PATCH] fix condition

---
 tasks/setup-Debian.yml | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tasks/setup-Debian.yml b/tasks/setup-Debian.yml
index ae7187d..f286052 100644
--- a/tasks/setup-Debian.yml
+++ b/tasks/setup-Debian.yml
@@ -43,4 +43,5 @@
   template:
     src: apt-preferences-docker.j2
     dest: /etc/apt/preferences.d/docker
-  when: docker_apt_version | length > 0
+  when: docker_apt_version is defined and
+        docker_apt_version | length > 0