From 6fb9a5ea96c4f81b968c0e0f17b5b28e608feec7 Mon Sep 17 00:00:00 2001
From: Colin Schlueter <colin@sofatutor.com>
Date: Mon, 20 Feb 2023 17:49:53 +0100
Subject: [PATCH] Fix nameserver substitution for IPv6 resolvers (#516)

---
 docker/run.sh | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/docker/run.sh b/docker/run.sh
index be233a0..3018210 100644
--- a/docker/run.sh
+++ b/docker/run.sh
@@ -1,8 +1,9 @@
 #!/bin/bash
 
 # Set up cache size and nameserver subs
+# Nameservers are taken from /etc/resolv.conf - if the IP contains ":", it's IPv6 and must be enclosed in [] for nginx
 CACHE_SIZE="${TAKAHE_NGINX_CACHE_SIZE:-1g}"
-NAMESERVER=`cat /etc/resolv.conf | grep "nameserver" | awk '{print $2}' | tr '\n' ' '`
+NAMESERVER=`cat /etc/resolv.conf | grep "nameserver" | awk '{print ($2 ~ ":") ? "["$2"]" : $2}' | tr '\n' ' '`
 if [ -z "$NAMESERVER" ]; then
     NAMESERVER="9.9.9.9 149.112.112.112"
 fi