private FileTree excludeOutputDirectory(FileTree sourceTree) {
if (sourceTree == null) {
return null;
}
Spec<File> outputDirectoryFilter =
new Spec<File>() {
@Override
public boolean isSatisfiedBy(File file) {
return file.getAbsolutePath().contains(getOutputDirectory().getAbsolutePath());
}
};
sourceTree = sourceTree.minus(sourceTree.filter(outputDirectoryFilter)).getAsFileTree();
return sourceTree;
}
