Support for excludeRoots?

[jaxley]

When pmd runs via the maven pmd plugin, it honors settings in the pom that exclude certain files (e.g. generated code)

                    <excludeRoots>
                        <excludeRoot>target/generated-sources/annotations</excludeRoot>
                    </excludeRoots>

But when you run the PMD plugin, it doesn't honor this at all and doesn't seem to provide a config option to set this so you can get equivalent results in the IDE as at build time.