If no command is provided, how can I have it default to show the --help?

[blockjon]

If someone runs my CLI program with no params, id like to have it just return the help response. I can't find an example of how to do that.

[epage]

For the derive api, its done for you if you have a required subcommand. Otherwise, you are looking for arg_required_else_help. This won't show help if you have arguments present but no subcommand.