Re: [PATCH] We do not like "HEAD" as a new branch name

["H. Peter Anvin" <hpa@zytor.com>]

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

> diff --git a/refs.c b/refs.c
> index bda45f7..293bfe7 100644
> --- a/refs.c
> +++ b/refs.c
> @@ -332,6 +332,11 @@ int check_ref_format(const char *ref)
>  		if (ch == '.' || bad_ref_char(ch))
>  			return -1;
>  
> +		/* do not allow "HEAD" as ref name */
> +		if (ch == 'H' && (!strcmp(cp, "EAD") ||
> +					!strncmp(cp, "EAD/", 4)))
> +			return -1;
> +
>  		/* scan the rest of the path component */
>  		while ((ch = *cp++) != 0) {

If you're have to open-code it, you might want to just do it all the way:

if (ch == 'H' && cp[0] == 'E' && cp[1] == 'A' && cp[2] == 'D' &&
     (cp[3] == '\0' || cp[3] == '/'))

	-hpa