public static void ls(CommandRepo repo, String filter) throws Exception {



        FixedIndexedRepo sourceRepo = repo.repo();

        sourceRepo.reset();



        Requirement requirement = getRequirement(filter);

        List<Resource> resources = findResources(sourceRepo, requirement);



        for (Resource resource : resources) {

            String location = getUrl(resources.get(0));

            System.out.println(resource + " => " + location);

        }

    }