Hey Steffen and Andy,
Continuing what I started on Twitter here, as some more characters might be helpful :)
It seems that both our projects (FLOW3 and Wikidata) are in a similar situation. We are using Gerrit as CR tool, and TravisCI to run our tests. And we both want to have Travis run tests for all patchsets submitted to Gerrit, and then +1 or -1 on verified based on the build passing or failing. To what extend have you gotten such a thing to work on your project? Is there code available anywhere? If both projects can use the same code for this, I'd be happy to contribute to what you already have.
Jeroen De Dauw
Don't panic. Don't be evil. ~=[,,_,,]:3