Re: [PATCH v3 04/12] path-walk: always emit directly-requested objects

[Taylor Blau <me@ttaylorr.com>]

On Mon, May 11, 2026 at 06:13:01PM +0000, Derrick Stolee via GitGitGadget wrote:
> We can tell that a path is part of the directly-referenced objects if its
> path name starts with '/' (other paths, including root trees never have this
> starting character). Create a path_is_for_direct_objects() to make this
> meaning clear, especially as we add more references in the future as we
> integrate the path-walk API with partial clone filter options.

I don't know that I have anything in the way of a better suggestion, but
I can't help but feel like the `path_is_for_direct_objects()` check is
somewhat brittle as-is.

I am not familiar enough with the path-walk.c internals to come up with
a good suggestion off the top of my head, but I figured I'd raise it
here in case you had thoughts on alternatives.
> diff --git a/path-walk.c b/path-walk.c
> index 6e426af433..59a7670c5b 100644
> --- a/path-walk.c
> +++ b/path-walk.c
> @@ -248,6 +248,16 @@ static int add_tree_entries(struct path_walk_context *ctx,
>  	return 0;
>  }
>
> +/*
> + * Paths starting with '/' (e.g., "/tags", "/tagged-blobs") hold objects that
> + * were directly requested by 'pending' objects rather than discovered during
> + * tree traversal.
> + */
> +static int path_is_for_direct_objects(const char *path)
> +{
> +	return path[0] == '/';

If we do end up keeping this approach, should we have a NULL check on
path itself here? I think that could even be an ASSERT(), since
something has gone wrong if we have a NULL at this point, but I'd rather
die by an assertion rather than a segfault here if so.

Thanks,
Taylor