This package for buildbot >= 0.9 allows to declare that workers have
capabilities, and produce BuilderConfig instances accordingly.
capabilities have a name (e.g. 'postgresql'), an optional version (9.5) and optional additional parameters (such as port=5433)
one declares what are each worker's capabilities as part of the worker config. A given capability name can occur on a worker several times, but a given (name, version) must appear exactly once.
it allows to express that a given build requires a given capability (e.g, access to a docker registry, presence of some helper program)
it spawns several BuilderConfigs according to available capabilities on the full swarm, in a configurable way (e.g., one for each postgresql version greater than 9.3 or for 9.1)
at build time, the optional capability parameters are available as properties, so that, e.g., a build running integration tests against postgresql 9.5 would be able to use the right port (5433 in the example above) to access the database.
For more details, check the doc/ subdirectory, or the online Sphinx build <http://docs.anybox.fr/anybox.buildbot.capability/master>_