From 328e63828e66a8a93fea0f2986741bfc066f5172 Mon Sep 17 00:00:00 2001
From: Bryan Boreham <bjboreham@gmail.com>
Date: Thu, 11 Jun 2015 16:36:02 +0100
Subject: [PATCH] Check whether netcheck exists before relying on it

---
 weave | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/weave b/weave
index 5a141f31..3e0b691a 100755
--- a/weave
+++ b/weave
@@ -986,7 +986,7 @@ case "$COMMAND" in
         eval "set -- $ARGS"
         if [ -z "$IPRANGE" ] ; then
             IPRANGE="-iprange 10.128.0.0/9"
-            if ! netcheck ${IPRANGE#* } ; then
+            if command_exists netcheck && ! netcheck ${IPRANGE#* } ; then
                 echo "Default" $IPRANGE "overlaps with existing route." >&2
                 echo "Please pick another range and set it on all hosts." >&2
                 exit 1