From ab49c85d984b2821cd98e608e72db8018b65b776 Mon Sep 17 00:00:00 2001
From: Jeff Geerling <geerlingguy@mac.com>
Date: Wed, 3 May 2017 10:59:50 -0500
Subject: [PATCH] Issue #2: Only use variable if it's defined.

---
 tasks/docker-compose.yml | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/tasks/docker-compose.yml b/tasks/docker-compose.yml
index 5b4fb8e..5b0857a 100644
--- a/tasks/docker-compose.yml
+++ b/tasks/docker-compose.yml
@@ -9,7 +9,9 @@
   file:
     path: /usr/local/bin/docker-compose
     state: absent
-  when: docker_compose_version not in docker_compose_current_version.stdout
+  when: >
+    docker_compose_current_version.stdout is defined
+    and docker_compose_version not in docker_compose_current_version.stdout
 
 - name: Install Docker Compose (if configured).
   get_url: