Re: [PATCH v8 3/6] remote set-head: better output for --auto

> +static void report_set_head_auto(const char *remote, const char *head_name,
> +			struct strbuf *buf_prev) {
> +	struct strbuf buf_prefix = STRBUF_INIT;
> +	const char *prev_head = NULL;
> +
> +	strbuf_addf(&buf_prefix, "refs/remotes/%s/", remote);
> +	skip_prefix(buf_prev->buf, buf_prefix.buf, &prev_head);
> +
> +	if (prev_head && !strcmp(prev_head, head_name))
> +		printf("'%s/HEAD' is unchanged and points to '%s'\n",
> +			remote, head_name);
> +	else if (prev_head)
> +		printf("'%s/HEAD' has changed from '%s' and now points to '%s'\n",
> +			remote, prev_head, head_name);
> +	else if (!buf_prev->len)
> +		printf("'%s/HEAD' is now created and points to '%s'\n",
> +			remote, head_name);
> +	else
> +		printf("'%s/HEAD' used to point to '%s' "
> +			"(which is not a remote branch), but now points to '%s'\n",
> +			remote, buf_prev->buf, head_name);
> +	strbuf_release(&buf_prefix);
> +}
> +

>  static int set_head(int argc, const char **argv, const char *prefix)
>  {
>  	int i, opt_a = 0, opt_d = 0, result = 0;
> -	struct strbuf buf = STRBUF_INIT, buf2 = STRBUF_INIT;
> +	struct strbuf buf = STRBUF_INIT, buf2 = STRBUF_INIT,
> +		buf_prev = STRBUF_INIT;