2.6.1. Programmatic Configuration Generation

Bearing in mind that master.cfg is a Python file, large configurations can be shortened considerably by judicious use of Python loops. For example, the following will generate a builder for each of a range of supported versions of Python:

pythons = ['python2.4', 'python2.5', 'python2.6', 'python2.7',
           'python3.2', 'python3.3']
pytest_workers = ["worker%s" % n for n in range(10)]
for python in pythons:
    f = util.BuildFactory()
    f.addStep(steps.SVN(...))
    f.addStep(steps.ShellCommand(command=[python, 'test.py']))
    c['builders'].append(util.BuilderConfig(
            name="test-%s" % python,
            factory=f,
            workernames=pytest_workers))

Next step would be the loading of pythons list from a .yaml/.ini file.