The following code in our sandbox generates an empty graph:
[[!graph src=""""
google [ href="http://google.com/" ]
sandbox [ href=\[[SandBox]] ]
help [ href=\[[ikiwiki/formatting]] ]
newpage [ href=\[[NewPage]] ]
google -> sandbox -> help -> newpage -> help -> google;
""""]]
It is the exact same thing that on the [[ikiwiki/directive/graph/]] directive documentation, from the [[plugins/graphviz]] plugin. This is ikiwiki 3.20120203 on Debian wheezy and graphviz is installed (2.26.3-10). Note that the first demo actually works. See <http://mesh.openisp.ca/sandbox> --[[anarcat]]