Hi Out of curiosity, I searched if we can have a nocommit comment in the code fail the commit. As far as I see, we try to avoid accidental commits (of say debug messages) by putting a nocommit comment, but I don't know if "svn ci" would fail in the presence of such comment - I guess not because we've seen some accidental nocommits checked in already in the past.
So I Googled around and found that if we have control of the svn repo, we can add a pre-commit hook that will check and fail the commit. Here is a nice article that explains how to add pre-commit hooks in general ( http://wordaligned.org/articles/a-subversion-pre-commit-hook). I didn't try it yet (on our local svn instance), so I cannot say how well it works, but perhaps someone has experience with it ... So if this is interesting, and is doable for Lucene (say, open a JIRA issue for Infra?) I don't mind investigating it further and write the script (which can be as simple as 'grep the changed files and fail on the presence of nocommit string'). Shai