public static ICommand AddHelp(this ObjectCommand command)
{
var help = new HelpOption();
command.CommandSource = command.CommandSource.Concat(new ObjectCommandSource(
null,
ObjectProvider.Create(help.GetType(), () => help)
));
help.Command = command;
return(command);
}
public static Maybe <ICommand> Create(ICommand parent, IObjectProvider containingObject, MethodInfo method, IEnumerable <IOption> inheritedOptions)
{
if (inheritedOptions == null)
{
throw new ArgumentNullException(nameof(inheritedOptions));
}
return(method
.GetUsage()
.Select(usage =>
{
var help = new HelpOption();
var helpCommand = new ObjectCommandSource(null, ObjectProvider.Create(help));
var c = new MethodCommand(parent, containingObject, method, helpCommand.Options.Concat(inheritedOptions));
help.Command = c;
return (ICommand)c;
}));
}