Generating a todo file for non-interactive rebasing

Hiya!

Whenever I do a particularly long rebase on a branch, sorting out conflicts from upstream, I find that it's often useful to have the additional context that you get during an interactive rebase, such as recent commands run, commands planned to run, and so on, to get a better idea of where I'm at during the rebase. These show when you run `git status` during an interactive rebase.

However, the code that generates this report relies on a todo list being generated in the rebase state directory. A todo list which consists only of "pick" commands is functionally equivalent to a non-interactive rebase, the only difference being that the editor isn't shown to the user.

Is there any reason not to refactor the rebase command to always generate a todo list? This would simplify the internals and provide more context to the user during hairy rebases. It might also be useful to run --edit-todo if you realize your rebase strategy needs to change partway through a rebase which was initially non-interactive.

Note: I'm a non-subscriber, please Cc me on replies.