Hi Eslam,

Thanks for working on this. I tried the v6 branch locally, and the path-key coverage looks good overall, but I think t1900 still misses a few non-default layouts that seem worth covering.

In particular, I think it would be useful to add coverage for:

  - linked worktrees, where path.git-dir points into
    .git/worktrees/<name>, path.common-dir still points at the main
    .git, and path.toplevel points at the linked checkout

  - repositories created with --separate-git-dir, especially
    path.git-dir with --path-format=relative

  - path.superproject-working-tree with --path-format=relative in a
    submodule

I tested these locally against rev-parse and they seem to behave as expected, so they may make good follow-up coverage for this series.

Thanks, Jialong