While it is a good idea to keep your build process self-contained in the source code tree, sometimes it is convenient to put more intelligence into your Buildbot configuration. One way to do this is to write a custom BuildStep. Once written, this Step can be used in the master.cfg file.
The best reason for writing a custom BuildStep is to better parse the
results of the command being run. For example, a BuildStep that knows
about JUnit could look at the logfiles to determine which tests had
been run, how many passed and how many failed, and then report more
detailed information than a simple rc==0 -based “good/bad”
decision.