Hi Federico, On Thu, 28 Oct 2021, Federico Kircheis wrote: > today I reported what I believed to be a bug on > > https://github.com/git-for-windows/git/issues/3496 > > and learned about GIT_DIR when working with aliases and git worktree. > > It's annoying that GIT_DIR it is defined only if (as far as I've understood) > working from a worktrees or submodule, as it does not seem to be related to > those type of repositories. To clarify: `GIT_DIR` is set when executing an alias in a worktree other than the primary one (and probably also in submodules), but not when executing in a primary worktree. > This is also irritating because apparently working aliases breaks when being > executed from those repositories. To clarify: an alias that wants to switch to a different repository and execute Git commands there works well in a primary worktree. But when you switch to a different repository while executing an alias from a secondary worktree, it will fail because of `GIT_DIR` having been set. > I believe it would be better if GIT_DIR it's either always set or never > (could someone enlighten me why the variable is needed in first place?). The fact that `GIT_DIR` is not set when calling an alias in a primary worktree suggests that the behavior in secondary worktrees is not by design. We should therefore be able to stop setting it there. The question is: what code is responsible for setting it only in some circumstances but not others? Federico, do you have any experience in debugging C code? If so, it would be good if you could take a crack at investigating this. Ciao, Johannes
