Command line builds and integration with Ant

InstallBuilder has a command line interface, so you can do :

/path/to/installbuilder/bin/builder build project.xml [platform]

where [platform] is the target platform you want to build the installer for. It can be one of the supported platforms, such as windows, solaris, linux, osx and so on. If [platform] is not specified, then the current one is selected

You can easily integrate with Ant using the task:

<exec executable="/path/to/installbuilder/bin/builder">
 <arg line="build project.xml linux"></arg>
</exec>