public static void PrintHelpMessage(TextWriter outputWriter, ICommandProvider commandProvider)
{
var c = commandProvider.Commands;
var o = commandProvider.Options.OrderBy(_ => _.Long);
var name = Name;
var w = Wrap(outputWriter);
var defaultCommand = commandProvider.DefaultCommand();
var optionsString = o.Any() ? " [options]" : String.Empty;
if (defaultCommand != null)
{
w.WriteLine($"usage: {name}{optionsString} {SyntaxWithoutCommand(defaultCommand)}");
w.WriteLine(defaultCommand.Description);
c = c.Except(new[] { defaultCommand }).OrderBy(_ => _.Name);
}
if (c.Count() > 1)
{
w.WriteLine();
w.WriteLine($"usage: {name}{optionsString} <command> [<args>]");
w.WriteLine("Run a command.");
w.WriteLine();
w.WriteLine("Commands:");
Format(c.Select(_ => new { _.Syntax, _.Description })).Write(w);
}
if (o.Any())
{
w.WriteLine();
w.WriteLine("Options:");
Format(o.Select(_ => new { _.Syntax, _.Description })).Write(w);
}
}
