sS disk_findMountPoint(File f, LS mountPoints, O... _) {
  ret f == null ? null : disk_findMountPoint(f.getPath(), mountPoints, _);
}

sS disk_findMountPoint(S f, LS mountPoints, O... _) {
  if (f == null) null;
  S path = addFileSep(getCanonicalPath(f));
  if (boolPar debug(_)) print("Canonical: " + path);
  ret bestByScoreFunction(mountPoints, mp -> startsWith(path, addFileSep(mp)) ? l(mp) : null);
}