public int Execute(params string[] args)
{
CommandLineApplication command = this;
CommandArgumentEnumerator arguments = null;
if (HandleResponseFiles)
{
args = ExpandResponseFiles(args).ToArray();
}
for (var index = 0; index < args.Length; index++)
{
var arg = args[index];
bool isLongOption = arg.StartsWith("--");
if (arg == "-?" || arg == "/?")
{
command.ShowHelp();
return(0);
}
else if (isLongOption || arg.StartsWith("-"))
{
CommandOption option;
var result = ParseOption(isLongOption, command, args, ref index, out option);
if (result == ParseOptionResult.ShowHelp)
{
command.ShowHelp();
return(0);
}
else if (result == ParseOptionResult.ShowVersion)
{
command.ShowVersion();
return(0);
}
else if (result == ParseOptionResult.UnexpectedArgs)
{
break;
}
}
else
{
var subcommand = ParseSubCommand(arg, command);
if (subcommand != null)
{
command = subcommand;
}
else
{
if (arguments == null || arguments.CommandName != command.Name)
{
arguments = new CommandArgumentEnumerator(command.Arguments.GetEnumerator(), command.Name);
}
if (arguments.MoveNext())
{
arguments.Current.Values.Add(arg);
}
else
{
HandleUnexpectedArg(command, args, index, argTypeName: "command or argument");
break;
}
}
}
}
if (Commands.Count > 0 && command == this)
{
throw new CommandParsingException(
command,
"Required command missing",
isRequiredSubCommandMissing: true);
}
return(command.Invoke());
}
