From 252d080403903e8e8f53e8943d6bd6385a71a82d Mon Sep 17 00:00:00 2001
From: Thomas Jensen <boxes@thomasjensen.com>
Date: Sun, 13 Jun 2021 15:39:05 +0200
Subject: [PATCH] Tag 'none' is not allowed

---
 src/tools.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/tools.c b/src/tools.c
index f70472f..280b274 100644
--- a/src/tools.c
+++ b/src/tools.c
@@ -710,7 +710,8 @@ int tag_is_valid(char *tag)
         && strspn(tag, "abcdefghijklmnopqrstuvwxyz-0123456789") == len
         && strchr("abcdefghijklmnopqrstuvwxyz", tag[0]) != NULL
         && tag[len - 1] != '-'
-        && strstr(tag, "--") == NULL;
+        && strstr(tag, "--") == NULL
+        && strcmp(tag, "none") != 0;
 }