Piwik is an open source (GPL licensed) web analytics software program (similar to Google Analytics). Hudson is a continuous integration server. If you want to track visits on your Hudson server using piwik, you need a Piwik Analytics plugin for Hudson. None exists officialy. I had a look at the Google Analytics plugin and adapted it to Piwik.

All you’ll need is a piwik siteId, the piwik server name and path of your piwik installation. And the Piwik Analytics plugin for Hudson that you can download here (save as…) till there is an official version available (maybe some more tests needed, any feedback will be appreciated!)

Update 2009-11-03: I fixed the mime type for hpi files so no more Save as should be needed.
Update 2009-11-04: some minor changes: french translations and the possibility to add download extensions (see

http://piwik.org/docs/javascript-tracking/

Update 2009-11-06: fixed the package to be compatible with jdk 1.5
Update 2009-11-07: the plugin has been officially released and should be available in you admin plugin list.