From: Johannes Schindelin <Johannes.Schindelin@gmx.de>
Date: Fri, 16 Dec 2005 01:40:25 +0000 (+0100)
Subject: We do not like "HEAD" as a new branch name
X-Git-Tag: v1.0.0^2~32
X-Git-Url: https://git.lorimer.id.au/gitweb.git/diff_plain/ee34518d629331dadd58b1a75294369d679eda8b

We do not like "HEAD" as a new branch name

This makes git-check-ref-format fail for "HEAD". Since the check is only
executed when creating refs, the existing symbolic ref is safe.

Otherwise these commands, most likely are pilot errors, would do
pretty funky stuff:

git checkout -b HEAD
git pull . other:HEAD

Signed-off-by: Johannes Schindelin <Johannes.Schindelin@gmx.de>
Signed-off-by: Junio C Hamano <junkio@cox.net>
---

diff --git a/refs.c b/refs.c
index d2aec73edc..b8fcb98dad 100644
--- 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;
 		}
 	}