It is located in trunk/tools directory on Subversion, but if you don't like to use Subversion just to grab this script, you can look up build-openvas-3-x.sh script on the web or download latest version of build-openvas-3-x.sh directly.
How to proceed with the build? Very simple! Just say something like this:
SUDOCMD="sudo" sh build-openvas-3-x.shScript will automatically download latest version, build it and install it to /opt/openvas-current-date (for example: /opt/openvas-2010-05-23).
There is also other options which you can pass as environment variable to the script, but you can look it up in the script source (there is some examples in the comment section). For the sake of completeness, here are few examples:
SUDOCMD="sudo" sh build-openvas-3-x.sh
OVNOCLI="yes" sh build-openvas-3-x.sh
OPENVASPATH="/opt/openvas-3" sh build-openvas-3-x.sh
OVSKIPLATEST="yes" sh build-openvas-3-x.sh
OVSKIPRM="yes" sh build-openvas-3-x.sh
OVSKIPBUILD="yes" sh build-openvas-3-x.sh
OVSKIPRM="yes" OVSKIPBUILD="yes" sh build-openvas-3-x.sh
Have a pleasant scanning with the OpenVAS! :)