Re: rebase not honoring core.worktree pointing elsewhere

> BTW, the impetus for this is a big integrated cross-compilation build system
> that has a nasty habit of deleting and re-creating a chroot environment
> containing the directory structures including the work tree.  If the ".git"
> dir is at the "normal" place "inside" the work tree, it gets deleted along
> with all the work I have done.  Not good, which is why I want to keep the
> ".git" somewhere else that's safe.  Solutions to this:
>
> (preferred) core.worktree pointing into worktree elsewhere, run all git
> commands from GIT_DIR.  Would be great if rebase worked under these
> circumstances.
>
> (best fallback) no core.worktree, export GIT_DIR pointing elsewhere, run all
> git commands from unmarked root of worktree.
>
> (complex) A complex scenario pushing and pulling stuff between a git repo
> inside the worktree and another git clone outside the worktree.
>
> (implementation dependent) Having the ".git" dir inside the worktree be a
> symbolic link to a dir somewhere outside the work tree.  Keeps the actual ".git"
> contents safe from deletion.  Works so far, but this is Tampering With The
> Implementation in a way that is likely to fail down the road somewhere,
> e.g., if an internal script does cd to the GIT_DIR, then cd relative to
> that to try to get back into somewhere else in the work tree.