Re: [PATCH 01/17] refs/files: simplify iterating through root refs

[shejialuo <shejialuo@gmail.com>]

On Fri, Jan 09, 2026 at 01:39:30PM +0100, Patrick Steinhardt wrote:
> When iterating through root refs we first need to determine the
> directory in which the refs live. This is done by retrieving the root of
> the loose refs via `refs->loose->root->name`, and putting it through
> `files_ref_path()` to derive the final path.
> 
> This is somewhat redundant though: the root name of the loose files
> cache is always going to be the empty string. As such, we always end up
> passing that empty string to `files_ref_path()` as the ref hierarchy we
> want to start. And this actually makes sense: `files_ref_path()` already
> computes the location of the root directory, so of course we need to
> pass the empty string for the ref hierarchy itself. So going via the
> loose ref cache to figure out that the root of a ref hierarchy is empty
> is only causing confusion.

Make sense, in `refs/ref-cache.c` we would call the following to create
the root loose cache:

    ret->root = create_dir_entry(ret, "", 0)

It would always be empty.

Thanks,
Jialuo