Re: [PATCH/RFCv3 2/2] receive-pack: don't pass non-existent refs to post-{receive,update} hooks in push deletions

[Junio C Hamano <gitster@pobox.com>]

Pang Yan Han <pangyanhan@gmail.com> writes:

> +/* For invalid refs */
> +static struct command **invalid_delete;
> +static size_t invalid_delete_nr;
> +static size_t invalid_delete_alloc;

Do you have to have these separately only to keep track of the corner case
errors?  I would have expected that it would be more natural to mark them
by adding a single bitfield to "struct command".

> @@ -447,6 +467,8 @@ static const char *update(struct command *cmd)
>  		if (!parse_object(old_sha1)) {
>  			rp_warning("Allowing deletion of corrupt ref.");
>  			old_sha1 = NULL;
> +			if (!ref_exists((char *) name))
> +				invalid_delete_append(cmd);

This is not an "invalid" delete but deleting a non-existing ref.  Perhaps
you would want to move the warning and optionally reword it as well, e.g.

	if (!parse_object(old_sha1)) {
        	old_sha1 = NULL;
                if (ref_exists(name)) {
			rp_warning("Allowing deletion of corrupt ref.");
		} else {
			rp_warning("Deleting a ref that does not exist.");
			cmd->did_not_exist = 1;
		}
		...