Tapping into your build system to automatically generate source code that includes build information (version, date, dependencies) is not only smart, it should be the standard. For Maven-based Java projects, I've long had a technique I use in every project by defining it in a standard parent pom.xml file used in every project. For Play framework's SBT-based build system, there fortunately is a plugin (sbt-buildinfo) which can accomplish the same result with just a few simple tweaks.
