private void HandleUnexpectedArg(CommandLineApplication command, string[] args, int index, string argTypeName)
{
if (command._throwOnUnexpectedArg)
{
command.ShowHint();
throw new CommandParsingException(command, $"Unrecognized {argTypeName} '{args[index]}'");
}
else
{
// All remaining arguments are stored for further use
command.RemainingArguments.AddRange(new ArraySegment <string>(args, index, args.Length - index));
}
}
public virtual int Execute(params string[] args)
{
CommandLineApplication command = this;
CommandOption option = null;
IEnumerator <CommandArgument> arguments = null;
for (var index = 0; index < args.Length; index++)
{
var arg = args[index];
var processed = false;
if (!processed && option == null)
{
string[] longOption = null;
string[] shortOption = null;
if (arg.StartsWith("--", StringComparison.Ordinal))
{
longOption = arg.Substring(2).Split(new[] { ':', '=' }, 2);
}
else if (arg.StartsWith("-", StringComparison.Ordinal))
{
shortOption = arg.Substring(1).Split(new[] { ':', '=' }, 2);
}
else // Look for symbols (such as help option)
{
var symbolOption = command.GetOptions().SingleOrDefault(opt => string.Equals(opt.SymbolName, arg, StringComparison.Ordinal));
if (symbolOption != null)
{
shortOption = new string[] { symbolOption.SymbolName, "" };
}
}
if (longOption != null)
{
processed = true;
var longOptionName = longOption[0];
option = command.GetOptions().SingleOrDefault(opt => string.Equals(opt.LongName, longOptionName, StringComparison.Ordinal));
if (option == null)
{
if (string.IsNullOrEmpty(longOptionName) && !command._throwOnUnexpectedArg && AllowArgumentSeparator)
{
// skip over the '--' argument separator
index++;
}
HandleUnexpectedArg(command, args, index, argTypeName: "option");
break;
}
// If we find a help/version option, show information and stop parsing
if (command.OptionHelp == option)
{
command.ShowHelp();
return(0);
}
else if (command.OptionVersion == option)
{
command.ShowVersion();
return(0);
}
if (longOption.Length == 2)
{
if (!option.TryParse(longOption[1]))
{
command.ShowHint();
throw new CommandParsingException(command, $"Unexpected value '{longOption[1]}' for option '{option.LongName}'");
}
option = null;
}
else if (option.OptionType == CommandOptionType.NoValue)
{
// No value is needed for this option
option.TryParse(null);
option = null;
}
}
if (shortOption != null)
{
processed = true;
option = command.GetOptions().SingleOrDefault(opt => string.Equals(opt.ShortName, shortOption[0], StringComparison.Ordinal));
// If not a short option, try symbol option
if (option == null)
{
option = command.GetOptions().SingleOrDefault(opt => string.Equals(opt.SymbolName, shortOption[0], StringComparison.Ordinal));
}
if (option == null)
{
HandleUnexpectedArg(command, args, index, argTypeName: "option");
break;
}
// If we find a help/version option, show information and stop parsing
if (command.OptionHelp == option)
{
command.ShowHelp();
return(0);
}
else if (command.OptionVersion == option)
{
command.ShowVersion();
return(0);
}
if (shortOption.Length == 2)
{
if (!option.TryParse(shortOption[1]))
{
command.ShowHint();
throw new CommandParsingException(command, $"Unexpected value '{shortOption[1]}' for option '{option.LongName}'");
}
option = null;
}
else if (option.OptionType == CommandOptionType.NoValue)
{
// No value is needed for this option
option.TryParse(null);
option = null;
}
}
}
if (!processed && option != null)
{
processed = true;
if (!option.TryParse(arg))
{
command.ShowHint();
throw new CommandParsingException(command, $"Unexpected value '{arg}' for option '{option.LongName}'");
}
option = null;
}
if (!processed && arguments == null)
{
var currentCommand = command;
foreach (var subcommand in command.Commands)
{
if (string.Equals(subcommand.Name, arg, StringComparison.OrdinalIgnoreCase))
{
processed = true;
command = subcommand;
break;
}
}
// If we detect a subcommand
if (command != currentCommand)
{
processed = true;
}
}
if (!processed)
{
if (arguments == null)
{
arguments = new CommandArgumentEnumerator(command.Arguments.GetEnumerator());
}
if (arguments.MoveNext())
{
processed = true;
arguments.Current.Values.Add(arg);
}
}
if (!processed)
{
HandleUnexpectedArg(command, args, index, argTypeName: "command or argument");
break;
}
}
if (option != null)
{
command.ShowHint();
throw new CommandParsingException(command, $"Missing value for option '{option.LongName}'");
}
return(command.Invoke());
}