Re: [PATCH 1/3] upload-pack: send the HEAD information

> From: Junio C Hamano <gitster@pobox.com>
>
> This implements the server side of protocol extension to show which branch
> the HEAD points at.  The information is sent as a capability symref=<target>.
>
> Signed-off-by: Junio C Hamano <gitster@pobox.com>
> Signed-off-by: Andreas Krey <a.krey@gmx.de>
> ---
>  upload-pack.c | 8 ++++++--
>  1 file changed, 6 insertions(+), 2 deletions(-)
>
> diff --git a/upload-pack.c b/upload-pack.c
> index 127e59a..390d1ec 100644
> --- a/upload-pack.c
> +++ b/upload-pack.c
> @@ -745,13 +745,17 @@ static int send_ref(const char *refname, const unsigned char *sha1, int flag, vo
>  	if (mark_our_ref(refname, sha1, flag, cb_data))
>  		return 0;
>  
> -	if (capabilities)
> -		packet_write(1, "%s %s%c%s%s%s agent=%s\n",
> +	if (capabilities) {
> +		unsigned char dummy[20];
> +		const char *target = resolve_ref_unsafe("HEAD", dummy, 0, NULL);
> +		packet_write(1, "%s %s%c%s%s%s%s%s agent=%s\n",
>  			     sha1_to_hex(sha1), refname_nons,
>  			     0, capabilities,
>  			     allow_tip_sha1_in_want ? " allow-tip-sha1-in-want" : "",
>  			     stateless_rpc ? " no-done" : "",
> +			     target ? " symref=" : "", target ? target : 0,
>  			     git_user_agent_sanitized());
> +	}
>  	else
>  		packet_write(1, "%s %s\n", sha1_to_hex(sha1), refname_nons);
>  	capabilities = NULL;