private void ParseOptionParameter(IOptionParser parser, OptionData optionData, OptionToken token)
{
string argument = null;
try {
if (optionData.ExpectsValue)
{
OptionToken argumentToken = parser.GetToken(true);
if (argumentToken == null)
{
OptionDefaultAttribute defaultAttribute = null;
if (optionData.Member != null)
{
defaultAttribute = GetAttribute <OptionDefaultAttribute>(optionData.Member);
}
if (defaultAttribute == null)
{
throw new OptionMissingArgumentException(token.ToString(parser));
}
argument = defaultAttribute.DefaultValue;
}
else
{
argument = argumentToken.Value;
}
SetOption(parser, optionData, argument);
}
else
{
// This is a boolean type. We can only set it to true.
SetBoolean(optionData, true);
}
optionData.Set = true;
} catch (OptionException) {
throw;
} catch (Exception e) {
string message;
if (argument == null)
{
message = string.Format("Error parsing option '{0}'", token.ToString(parser));
throw new OptionException(message);
}
message = string.Format("Wrong format '{0}' given to option {1}", argument, token.ToString(parser));
throw new OptionFormatException(token.Value, message, e);
}
}
private void ParseShortOption(IOptionParser parser, OptionToken token)
{
if (!m_ShortOptionList.TryGetValue(token.Value[0], out OptionData optionData))
{
throw new OptionUnknownException(token.ToString(parser));
}
ParseOptionParameter(parser, optionData, token);
}
private void ParseLongOption(IOptionParser parser, OptionToken token)
{
string option = parser.LongOptionCaseInsensitive ? token.Value.ToLowerInvariant() : token.Value;
if (!m_LongOptionList.TryGetValue(option, out OptionData optionData))
{
throw new OptionUnknownException(token.ToString(parser));
}
ParseOptionParameter(parser, optionData, token);
}
/// <summary>
/// Parses the command line arguments.
/// </summary>
/// <param name="arguments">The command line arguments to parse.</param>
/// <remarks>
/// Parses the command line arguments provided, setting the fields in the object provided when
/// this object was instantiated.
/// </remarks>
private void ParseCommandLine(string[] arguments)
{
OptionToken token;
OptionToken lastToken = null;
OptionToken lastOptionToken = null;
IOptionParser parser;
switch (m_OptionsStyle)
{
case OptionsStyle.Unix:
parser = new UnixOptionParser(arguments);
break;
case OptionsStyle.Windows:
parser = new WindowsOptionEnumerator(arguments);
break;
default:
throw new InternalApplicationException("Unknown command style parser");
}
BuildOptionList(parser.LongOptionCaseInsensitive);
IOptions options = m_Options as IOptions;
if (m_Arguments == null)
{
m_Arguments = new List <string>();
}
try {
do
{
string message;
token = parser.GetToken(false);
if (token == null)
{
continue;
}
switch (token.Token)
{
case OptionTokenKind.ShortOption:
case OptionTokenKind.LongOption:
if (m_Arguments.Count > 0)
{
if (lastOptionToken != null)
{
message = string.Format("Unexpected option '{0}', perhaps too many arguments after '{1}'",
token.ToString(parser), lastOptionToken.ToString(parser));
}
else
{
message = string.Format("Unexpected option '{0}'", token.ToString(parser));
}
throw new OptionException(message);
}
ParseOption(parser, token);
lastOptionToken = token;
break;
case OptionTokenKind.Argument:
ParseArgument(token);
break;
case OptionTokenKind.Value:
if (lastToken != null)
{
message = string.Format("Unexpected value for option {0} (argument {1})",
lastToken.ToString(parser), token);
throw new OptionException(message);
}
message = string.Format("Unexpected value {0}", token);
throw new OptionException(message);
}
lastToken = token;
} while (token != null);
} catch (OptionUnknownException e) {
if (options != null)
{
options.InvalidOption(e.Option);
}
throw;
} catch (OptionMissingArgumentException e) {
if (options != null)
{
options.InvalidOption(e.Option);
}
throw;
} catch (OptionFormatException e) {
if (options != null)
{
options.InvalidOption(e.Option);
}
throw;
} catch (OptionException) {
if (options != null)
{
options.Usage();
}
throw;
}
// Check that all mandatory options were provided
StringBuilder sb = new StringBuilder();
List <string> optionList = new List <string>();
foreach (OptionData optionData in m_OptionList)
{
if (optionData.Attribute.Required && !optionData.Set)
{
MissingOption(parser,
optionData.Attribute.ShortOption,
optionData.Attribute.LongOption,
sb, optionList);
}
}
if (sb.Length > 0)
{
if (options != null)
{
options.Missing(optionList);
}
throw new OptionMissingException(sb.ToString());
}
if (options != null)
{
options.Check();
}
}