Hi,
1) I had some untracked files in a submodule repo. I couldn't find a way to get `arc diff` to ignore these, as they appeared to git to be a change in a tracked file (that is, a change to a submodule, which is considered tracked). `git stash` offered no help, so I had to delete the untracked files. This didn't cause real pain (the files were there in error), but it seems a weakness of the system if I can't make progress otherwise.
Using the `-u` flag with `git stash` will also stash the untracked files. Unfortunately, as far as I'm aware, there's no built-in command to do it recursively for every submodule.
2) I develop and build in the same tree. This means that I often have a few untracked files in the outer, ghc.git repo that someone hasn't yet added to .gitignore. Thus, I need to say `--allow-untracked` to get `arc diff` to work. I will likely always need `--allow-untracked`, so I looked for a way to get this to be configured automatically. I found https://secure.phabricator.com/book/phabricator/article/arcanist/#configurat... , but the details there are sparse. Any advice?
I'm assuming that you don't want to add those files to .gitignore yourself, so would adding them to ".git/info/exclude" solve your problem? (In case you don't know, this file works like .gitignore except that it's not version controled). Cheers, Pedro Rodrigues