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,
$"Unexpected value '{optionComponents[1]}' for option '{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, $"Unexpected value '{arg}' for option '{optionName}'");
}
}
}
}
return(result);
}
public CommandParsingException(CommandLineApplication command, string message)
: base(message)
{
Command = command;
}
