There's a lot of hate bouncing around here for Jenkins. Can we stop for a moment and remember what it meant to set up a build system before Jenkins was around? Sure, it's not rocket science, but Jenkins made things quite a lot easier and made continue integration actually possible to think about for many shops. It's no small feat that they managed to do this for n revision control systems * m languages with associated build systems and testing frameworks * q random options and make it still mostly work.

Jenkins moved the minimum acceptable level of automation, for the industry, up quite a lot farther than it used to be. Say what you will but remember its impact, and that the guy who made it is quite possibly reading this thread.