Gyrex builds are produced on the Eclipse.org infrastructure. It's also possible to build locally.
The root for all build related stuff is the Gyrex RelEng (Release Engineering) project.
Hudson Build Jobs
The nightly job is used for CI compile check builds. It monitors the full source tree for changes and kicks of a build every once in a while when somebody checked something into source control. However, it always uses HEAD when performing checkouts. The build results should not be used.
The integration job is used for producing I, S and R builds. Care must be taken when producing S and R builds. The results are automatically published to download.eclipse.org (when running on Eclipse.org infrastructure).