We use Jenkins to build Eclipse plugins. This plugins typically end up as JARs. Right now when I want to get coverage I point at the eclipse/plugins dir as my classPattern and use inclusion/exclusion patterns to choose which JARs I care about (to filter out the base eclipse ones). The problem is that it ends up copying then entire eclipse plugins directory to the build's jacoco/classes dir and post filtering. This results in taking up huge amounts of disk space for JARs we never care about for coverage.