globus-service-build is a general-purpose Ant buildfile and script that, given a set of Java, WSDL, WSDD, etc. files conforming to a specific directory structure, will generate a GAR file without the need to manually edit the Ant file. This is the same Ant buildfile + script included in The GT3 Tutorial and the The GT4 Tutorial.  The reason for taking this tool out of the tutorial and into a separate project space is to encourage developers to add their own improvements so the result is not a tool that only meets the build requirements of the tutorial examples, but a more general-purpose tool that can be used in different projects. Please note that the tutorial will continue to include a build script, but the latest version will always be found at the GSBT project.