Programming languages haven’t changed much over the years: the latest languages to take over large swathes of the industry (Java and C#) are unashamed about being cleaned-up versions of C++, which itself was a melding of C with object concepts. What has changed immensely recently is the state of the art in how large programs are built and tested, the “build chain”.

We don’t talk about this much because it isn’t very client-facing, but thanks to the efforts of Justin Deoliveira and Tim Schaub, OpenGeo has a quite robust build environment. Early on in the development on the OpenGeo Suite we found that the number of steps necessary to move from a particular version of the code to an installable and testable artifact was very high—so high that cycles of test/fix/re-test were just too long.

So we automated this chain, and not just the build. Our software is now automatically built out from source code all the way to installers (for Mac OS X and Windows) and packages (for Ubuntu Linux and CentOS Linux) and machine images (for Amazon AWS) every hour. The industry term for what we’re doing is called “continuous integration“.

The complexity of a system that builds multiple components (GeoServer, PostGIS, PostgreSQL, GeoExt, etc.) in multiple languages (C, Java, JavaScript) on multiple operating systems (Linux, OS X, Windows) is quite substantial, but it is all worth it to be able to incorporate a bug fix into a new installer in short order without human intervention. As we have many clients who are depending on our software for their deployments, this reliable turnaround is critical.

Our system has grown so large that we are now devoting a full-time engineer (welcome, Michael Weisman) just to maintaining and improving it. In time, we plan to add even more components and functions into the mix, such as continuous builds of GDAL and continuous unit testing of all components against multiple databases. The benefits in flexibility, quality, and development speed is well worth the investment.

So if you’re looking for us, you’ll find us building on the chain.