Serverless Swift on OpenWhisk

I’m interested in serverless computing and as I write Swift, the OpenWhisk platform comes up high when you Google. This turns out to be a really good choice as OpenWhisk is Open Source so I can read the source code (and have done!). In principle, I can also run my own instance of it if I need to for regulatory reasons, or just to avoid vendor lock-in.
Commercially, the whole point of Serverless (aka Functions as a Service) is that it deals with everything infrastructure related other than the function I am writing. So I actually host my OpenWhisk functions with IBM’s Bluemix.