public int Execute(params string[] args)
{
CommandLineApplication command = this;
CommandOption option = null;
IEnumerator <CommandArgument> arguments = null;
if (HandleResponseFiles)
{
args = ExpandResponseFiles(args).ToArray();
}
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("--"))
{
longOption = arg.Substring(2).Split(new[] { ':', '=' }, 2);
}
else if (arg.StartsWith("-"))
{
shortOption = arg.Substring(1).Split(new[] { ':', '=' }, 2);
}
if (longOption != null)
{
processed = true;
string longOptionName = longOption[0];
option = command.Options.SingleOrDefault(opt => string.Equals(opt.LongName, longOptionName, StringComparison.Ordinal));
if (option == null)
{
if (string.IsNullOrEmpty(longOptionName) && !command._throwOnUnexpectedArg && AllowArgumentSeparator)
{
// a stand-alone "--" is the argument separator, so skip it and
// handle the rest of the args as unexpected args
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 || option.OptionType == CommandOptionType.BoolValue)
{
// No value is needed for this option
option.TryParse(null);
option = null;
}
}
if (shortOption != null)
{
processed = true;
option = command.Options.SingleOrDefault(opt => string.Equals(opt.ShortName, shortOption[0], StringComparison.Ordinal));
// If not a short option, try symbol option
if (option == null)
{
option = command.Options.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 || option.OptionType == CommandOptionType.BoolValue)
{
// 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());
}
private ParseOptionResult ParseOption(
bool isLongOption,
CommandLineApplication command,
string[] args,
ref int index,
out CommandOption option)
{
option = null;
ParseOptionResult result = ParseOptionResult.Succeeded;
var arg = args[index];
int optionPrefixLength = isLongOption ? 2 : 1;
string[] optionComponents = arg.Substring(optionPrefixLength).Split(new[] { ':', '=' }, 2);
string optionName = optionComponents[0];
if (isLongOption)
{
option = command.Options.SingleOrDefault(
opt => string.Equals(opt.LongName, optionName, StringComparison.Ordinal));
}
else
{
option = command.Options.SingleOrDefault(
opt => string.Equals(opt.ShortName, optionName, StringComparison.Ordinal));
if (option == null)
{
option = command.Options.SingleOrDefault(
opt => string.Equals(opt.SymbolName, optionName, StringComparison.Ordinal));
}
}
if (option == null)
{
if (isLongOption && string.IsNullOrEmpty(optionName) &&
!command._throwOnUnexpectedArg && AllowArgumentSeparator)
{
// a stand-alone "--" is the argument separator, so skip it and
// handle the rest of the args as unexpected args
index++;
}
HandleUnexpectedArg(command, args, index, argTypeName: "option");
result = ParseOptionResult.UnexpectedArgs;
}
else if (command.OptionHelp == option)
{
result = ParseOptionResult.ShowHelp;
}
else if (command.OptionVersion == option)
{
result = ParseOptionResult.ShowVersion;
}
else
{
if (optionComponents.Length == 2)
{
if (!option.TryParse(optionComponents[1]))
{
command.ShowHint();
throw new CommandParsingException(command,
String.Format(LocalizableStrings.UnexpectedValueForOptionError, optionComponents[1], optionName));
}
}
else
{
if (option.OptionType == CommandOptionType.NoValue ||
option.OptionType == CommandOptionType.BoolValue)
{
// No value is needed for this option
option.TryParse(null);
}
else
{
index++;
arg = args[index];
if (!option.TryParse(arg))
{
command.ShowHint();
throw new CommandParsingException(
command,
String.Format(LocalizableStrings.UnexpectedValueForOptionError, arg, optionName));
}
}
}
}
return(result);
}