From e5c23bf9f542e24b8fd757981e71367d2a1a65af Mon Sep 17 00:00:00 2001
From: Bryan Boreham <bjboreham@gmail.com>
Date: Tue, 5 Jul 2016 13:02:59 +0100
Subject: [PATCH] Don't crash if docker API is disabled by params

---
 prog/weaver/main.go | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/prog/weaver/main.go b/prog/weaver/main.go
index 8403e2f1..3d2c1fa3 100644
--- a/prog/weaver/main.go
+++ b/prog/weaver/main.go
@@ -252,6 +252,7 @@ func main() {
 	}
 
 	var dockerCli *docker.Client
+	dockerVersion := "none"
 	if dockerAPI != "" {
 		dc, err := docker.NewClient(dockerAPI)
 		if err != nil {
@@ -260,13 +261,14 @@ func main() {
 			Log.Info(dc.Info())
 		}
 		dockerCli = dc
+		dockerVersion = dockerCli.DockerVersion()
 	}
 
 	network := ""
 	if isAWSVPC {
 		network = "awsvpc"
 	}
-	checkForUpdates(dockerCli.DockerVersion(), network)
+	checkForUpdates(dockerVersion, network)
 
 	observeContainers := func(o docker.ContainerObserver) {
 		if dockerCli != nil {