From cf299f59de0e7171eebc6581dac6e8bd45da9d59 Mon Sep 17 00:00:00 2001
From: Adam Harrison <harrisonadamw@gmail.com>
Date: Tue, 28 Apr 2015 11:07:41 +0100
Subject: [PATCH] Detach of unattached container succeeds silently

---
 weave | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/weave b/weave
index 364d3609..7e9597dd 100755
--- a/weave
+++ b/weave
@@ -392,6 +392,8 @@ attach() {
 }
 
 detach() {
+    netnsenter ip link show $CONTAINER_IFNAME >/dev/null 2>&1 || return 0
+
     for ADDR; do
         if ! netnsenter ip addr show dev $CONTAINER_IFNAME | grep -F $ADDR >/dev/null ; then
             # address is not there, leave the device alone