CI at CC

I wrote about our roll-out of Hudson on the CC Labs blog . I wanted to note a few things about deploying that, primarily for my own reference. Hudson has some great documentation, but I found Joe Heck’s step by step instructions on using Hudson for Python projects particularly helpful. We’re using nose for most of our projects, and buildout creates a nosetest script wrapper that Hudson runs to generate pass/fail reports.

Setting up coverage is on the todo list , but it appears that our particular combination of libraries has at least one strange issue: when cc.license uses Jinja2 to load a template, coverage thinks it’s a Python source file (maybe it uses an import hook or something? haven’t looked) and tries to tokenize it when generating the xml report. Ka-boom . (This has apparently already been reported .)

Another item in the “maybe/someday” file is using Tox to run the tests using multiple versions of Python (example configuration for Tox + Hudson exists). I can see that this is a critical part of the process when releasing libraries for others to consume. We have slightly less surface area — all the servers run the same version of Python — but it’d be great to know exactly what our possible deployment parameters are.

Overall Hudson already feels like it’s adding to our sanity. I just received my copy of Continuous Delivery , so I think this is the start of something wonderful.