I thought I'd try it with a fairly large project (353K lines of Java) at https://git.eclipse.org/c/hudson/org.eclipse.hudson.core.git...

This is a multi-level project. At both the top level and the individual module level, the command below seems to do exactly nothing. Actual output:

org.eclipse.hudson.core$ infer -- mvn build

org.eclipse.hudson.core$ cd hudson-core/

hudson-core$ infer -- mvn build

hudson-core$