tengqm commented on code in PR #5988:
URL: https://github.com/apache/gravitino/pull/5988#discussion_r1897519512


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clients/cli/src/main/java/org/apache/gravitino/cli/GravitinoCommandLine.java:
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@@ -733,17 +733,26 @@ protected void handleRoleCommand() {
     String userName = line.getOptionValue(GravitinoOptions.LOGIN);
     FullName name = new FullName(line);
     String metalake = name.getMetalakeName();
-    String role = line.getOptionValue(GravitinoOptions.ROLE);
     String[] privileges = line.getOptionValues(GravitinoOptions.PRIVILEGE);
 
     Command.setAuthenticationMode(auth, userName);
 
+    String[] roles = line.getOptionValues(GravitinoOptions.ROLE);
+    if (roles == null && !CommandActions.LIST.equals(command)) {
+      System.err.println(ErrorMessages.MISSING_ROLE);
+      Main.exit(-1);
+    }

Review Comment:
   In the same spirit, I'm curious whether/how we can generalize this checking 
of duplicated option which is supposed to be specified only once.
   This is not specific to the `--role` option, and we are not supposed to 
handle them for all actions separately.



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