From f5eb62c1801cc099c31eb5b3d1b6c6e6941c4d8e Mon Sep 17 00:00:00 2001
From: Harald Albers <github@albersweb.de>
Date: Wed, 16 Sep 2015 18:09:35 +0200
Subject: [PATCH] Fix bash completion when extglob is not set

Signed-off-by: Harald Albers <github@albersweb.de>
---
 contrib/completion/bash/docker | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/contrib/completion/bash/docker b/contrib/completion/bash/docker
index 9d63416c4b..be229039d3 100644
--- a/contrib/completion/bash/docker
+++ b/contrib/completion/bash/docker
@@ -182,12 +182,12 @@ __docker_pos_first_nonflag() {
 # globs like '--log-level|-l'
 # Only positions between the command and the current word are considered.
 __docker_value_of_option() {
-	local option_glob=$1
+	local option_extglob=$(__docker_to_extglob "$1")
 
 	local counter=$((command_pos + 1))
 	while [ $counter -lt $cword ]; do
 		case ${words[$counter]} in
-			@($option_glob) )
+			$option_extglob )
 				echo ${words[$counter + 1]}
 				break
 				;;