Set<File> shaFiles = parentTask.get().getShaFiles();

        for (File dependency : parentTask.get().getDependencies()) {
            String jarName = dependency.getName();
            File shaFile = parentTask.get().getShaFile(jarName);

            if (shaFile.exists() == false) {
                createSha(dependency, jarName, shaFile);
            } else {
                shaFiles.remove(shaFile);
            }
        }