There are too many installed systems, and too many users accustomed to CVS, to abandon it at least in the short term. We need to maintain a CVS export of the new VCS.

The main FreeBSD repositories would be in git. However, we could easily construct a cronjob to export our changes to the old CVS repos, similar to what we do with p4, which would have commit messages like “FreeBSD automated git to CVS import of commit <sha1>”. This allows those who want read-only access without using git to continue using CVS. This leaves trouble debugging, where the user only has version information for $FreeBSD$ CVS IDs (if those even stuck around!) to tell us, while the developers aren't interacting with the CVS revision IDs. So, I would recommend in that export process to create a file at the top level of the repo marking what sha1 the last import was from, which allows users of both cvsup checkout mode and normal CVS to tell developers what git revision their code was from.