import net.schmizz.sshj.xfer.InMemorySourceFile;
import net.schmizz.sshj.xfer.scp.SCPFileTransfer;

static void scpDownload(S user, S host, fS remotePath, File localDir) ctex {
  final SSHClient client = sshLogin(user, host);
  try {
    SCPFileTransfer fileTransfer = client.newSCPFileTransfer();
    File f = new File(localDir, afterLastSlash(remotePath));
    print("Downloading " + user + "@" + host + ":" + remotePath + " to " + f2s(f));
    fileTransfer.download(remotePath, f2s(mkdirsForFile(f)));
  } finally {
    sshDisconnect(client);
  }
}

Began life as a copy of #1009981