From: Antonio Russo <aerusso@aerusso.net>
Date: Tue, 12 Aug 2025 13:40:55 GMT
Subject: Re: Git synthetic worktree
Message-ID: <b6179ded-abbf-4c9a-95c4-903451f7bc71@aerusso.net>
In-Reply-To: <CAMqSRmCj-wcra=HE1=kv1LQU3UxhBg6zfbtO_OhWwJEqdf8gmw@mail.gmail.com>

On 2025-08-12 01:56, Jimmy Thrasibule wrote:
> Hi,
> 
> I'd like to create a single worktree where files from multiple Git
> repositories (or refs) coexist side-by-side (no subfolder separation),
> but each with repository still independently tracked by Git.

I've accomplished something similar to this with a gitignore-everything
policy and sparse checkout (non-cone mode, very important!).

It's janky: I use GIT_DIR and GIT_WORK_TREE to force the selection of
which git repository, and I have to use 'git add -f' everywhere.

If you need something that works today, this may be a workaround.  It
does not allow for your "default override" based on layer priority,
instead it is very file-by-file specific.

As an aside, what you are describing sounds somewhat like a use-case
for ostree, which I know very little about.

Best,
Antonio