Hi Pulsar Community, The pulsar CLI(pulsar-admin, pulsar-client, pulsar-shell, and so on) uses the jcommander [1] as CLI parser, which is an awesome project, but the maintainer is not active and cannot keep up with modern CLI features(auto-completion, sub-command, native-images, suggest commands, and so on). Then I found the picocli [2] project to meet these needs, which is active and powerful. For comparison, please see [3].
Error prompt: ``` bin/pulsar-admin clusters update cluster-a -b # jcommander Need to provide just 1 parameter # picocli Unknown option: '-b' ``` Suggest commands: ``` bin/pulsar-admin cluste # jcommander Expected a command, got cluste # picocli Unmatched argument at index 0: 'cluste' Did you mean: pulsar-admin clusters? ``` What do you think about migrating CLI parse from jcommander to picocli? Thanks, Zixuan [1] - https://github.com/cbeust/jcommander [2] - https://picocli.info/ [3] - https://github.com/remkop/picocli/wiki/picocli-vs-JCommander
