For as long as Hudson's had a plugin model and development community, we've provided source code and binary hosting through our Subversion repo at java.net. But what if you're a plugin developer and you don't want to use Subversion? Well, we have an alternative for your source code: host it with Hudson on GitHub.
To get this in place, send an email to firstname.lastname@example.org (or ask in the IRC channel) asking to get a repository created for your plugin at Github. Make sure to include the name of the plugin and your Github username (and the Github usernames of any other developers who'll be pushing to your plugin's repo). If your plugin is already in Github, include the URL for the existing repo so that we can fork it. One of the Hudson admins will create the repository (forking if appropriate) and add the user(s) to the list of users with push access to the Hudson-hosted repositories at Github. Once you hear back from them, you'll be able to push code to the new repository.
You will need to make a few changes to your plugin's POM, as compared to what works for a plugin POM in the java.net Subversion tree.