fix checking of docker version in sphinx
It fails in cases when docker isn't installed yet.
Change-Id: I4193653d61e1a748595aed711a2fcfd8793c401d
diff --git a/docker/meta/sphinx.yml b/docker/meta/sphinx.yml
index f4571d3..203eb0c 100644
--- a/docker/meta/sphinx.yml
+++ b/docker/meta/sphinx.yml
@@ -7,7 +7,7 @@
name: host
param:
version:
- value: "{{ salt['cmd.shell']('docker --version', python_shell=True) }}"
+ value: "{{ salt['cmd.shell']('docker --version 2>/dev/null || echo unknown', python_shell=True) }}"
{%- endif %}
{%- if pillar.docker.swarm is defined %}
{%- from "docker/map.jinja" import swarm with context %}