code: public int run(String... argv) {
      if (argv.length == 0) {
        printUsage();
        return -1;
      }
  
      // Sanity check on the number of arguments
      String cmd = argv[0];
      Command command = mCommands.get(cmd);
  
      if (command == null) {
        String[] replacementCmd = getReplacementCmd(cmd);
        if (replacementCmd == null) {
          // Unknown command (we didn't find the cmd in our dict)
          System.err.println(String.format("%s is an unknown command.", cmd));
          printUsage();
          return -1;
        } else {
          // Handle command alias
          if (mUnstableAlias != null && mUnstableAlias.contains(cmd)) {
            String deprecatedMsg =
                String.format("WARNING: %s is not a stable CLI command. It may be removed in the "
                        + "future. Use with caution in scripts. You may use '%s' instead.",
                    cmd, StringUtils.join(replacementCmd, " "));
            System.out.println(deprecatedMsg);
          }
  
          String[] replacementArgv =
              (String[]) ArrayUtils.addAll(replacementCmd, ArrayUtils.subarray(argv, 1, argv.length));
          return run(replacementArgv);
        }
      }
  
      String[] args = Arrays.copyOfRange(argv, 1, argv.length);
      CommandLine cmdline;
      try {
        cmdline = command.parseAndValidateArgs(args);
      } catch (InvalidArgumentException e) {
        System.out.println("Usage: " + command.getUsage());
        LOG.error("Invalid arguments for command {}:", command.getCommandName(), e);
        return -1;
      }
  
      // Handle the command
      try {
        return command.run(cmdline);
      } catch (Exception e) {
        System.out.println(e.getMessage());
        LOG.error("Error running " + StringUtils.join(argv, " "), e);
        return -1;
      }
    }
docs: Handles the specified shell command request, displaying usage if the command format is invalid.
  
  @param argv [] Array of arguments given by the user's input from the terminal
  @return 0 if command is successful, -1 if an error occurred