As more and more open-source projects from Sun are migrating to Mercurial, it's just a matter of time before I need Mercurial support in Hudson.

So I've been working on Mercurial plugin for Hudson, and today I posted the first version. It supports all the basic operations, like polling, check out/update, changelog computation, etc. It requires Mercurial 0.9.4.

With Mercurial, the act of check out requires pulling the whole repository with the entire history. So it might be fun to integrate the repository browsing feature into Hudson through this plugin as well.