code: def ls():                       # pylint:disable=C0103
      
      for pkg_dir in PackageStore.find_store_dirs():
          print("%s" % pkg_dir)
          packages = PackageStore(pkg_dir).ls_packages()
          for package, tag, pkghash in sorted(packages):
              print("{0:30} {1:20} {2}".format(package, tag, pkghash))
docs: List all installed Quilt data packages