This document has moved to https://github.com/jbosstools/jbosstools-devdoc/blob/master/building/build_documentation.md
You can now build the whole suite of docs available here  from the Jenkins job here .
To build locally, clone this project  into the same place you have all of the jbosstools-* github repos checked out.
mvn -s settings.xml -f pom.xml clean assembly:assembly
Building a single component's documentation
After cloning the above project, you can selectively build a single component's doc by commenting out the modules you don't want to build in this pom, then rerunning the step above.
In future we may find a way to run individual doc builds w/o the need for all-guides.xml and the additional Maven <build> plugin configuration.