The NMI build & test laboratory: continuous integration framework for distributed computing software

We present a framework for building and testing software in a heterogeneous, multi-user, distributed computing environment. Unlike other systems for automated builds and tests, our framework is not tied to a specific developer tool, revision control system, or testing framework, and allows access to computing resources across administrative boundaries. Users define complex software building procedures for multiple platforms with simple semantics. The system balances the need to continually integrate software changes while still providing on-demand access for developers. Our key contributions in this paper are: (1) the development of design principles for distributed build-and-test systems, (2) a description of an implemented system that satisfies those principles, and (3) case studies on how this system is used in practice at two sites where large, multi-component systems are built and tested.