From: Johannes Schindelin <johannes.schindelin@gmx.de>
Date: Fri, 16 Dec 2005 01:40:25 GMT
Subject: Re: [PATCH] We do not like "HEAD" as a new branch name
Message-ID: <Pine.LNX.4.63.0512160238300.6530@wbgn013.biozentrum.uni-wuerzburg.de>
In-Reply-To: <7v4q5alyms.fsf@assigned-by-dhcp.cox.net>

Hi,

On Thu, 15 Dec 2005, Junio C Hamano wrote:

> Just to futureproof ourselves, how about this?
> 
> 	/^(?:.*/)?(?:[A-Z0-9]+_)?HEAD$/
> 
> The last path component being "HEAD" or capital-or-digit
> followed by underscore followed by "HEAD".

Okay. Why not go the full nine yards, and not be difficult about it:

diff --git a/refs.c b/refs.c
--- a/refs.c
+++ b/refs.c
@@ -345,6 +345,11 @@ int check_ref_format(const char *ref)
 		if (!ch) {
 			if (level < 2)
 				return -1; /* at least of form "heads/blah" */
+
+			/* do not allow ref name to end in "HEAD" */
+			if (cp - ref > 4 && !strcmp(cp - 4, "HEAD"))
+				return -1;
+
 			return 0;
 		}
 	}

Ciao,
Dscho