--help breaks when using required options when using singleCommand()

[burtonator]

If I have:

@Option(name = { "--sourceIndexes"}, description = "Source indexes to read from.", required = true)
public List<String> sourceIndexes;

and then do --help it tells me:

io.airlift.airline.ParseOptionMissingException: Required option '--targetIndex' is missing

... but if I remove required=true

I'll get the proper help output.

which is not fun because for our use case this breaks airline. Though I might see if I can work around this.

[ajs6f]

I have the same problem. Perhaps it would be possible to have a notion of "required when X is not present"? That could actually be more valuable than just this use case.

[ajs6f]

Meanwhile, the pattern I am currently using is:

final SingleCommand<Tool> cliParser = singleCommand(MyCommand.class);
try {
    final Tool tool = cliParser.parse(args);
    tool.run();
} catch (ParseOptionMissingException e) {
    help(cliParser.getCommandMetadata());
    }
}

where help is com.github.rvesse.airline.help.Help.help(CommandMetadata).

[findepi]

This apparently duplicates #22