public CommandTreeParserResult Parse(IEnumerable <string> args)
{
var context = new CommandTreeParserContext(args, _configuration.ParsingMode);
var tokenizerResult = CommandTreeTokenizer.Tokenize(context.Arguments);
var tokens = tokenizerResult.Tokens;
var rawRemaining = tokenizerResult.Remaining;
var result = (CommandTree)null;
if (tokens.Count > 0)
{
// Not a command?
var token = tokens.Current;
if (token.TokenKind != CommandTreeToken.Kind.String)
{
// Got a default command?
if (_configuration.DefaultCommand != null)
{
result = ParseCommandParameters(context, _configuration.DefaultCommand, null, tokens);
return(new CommandTreeParserResult(
result, new RemainingArguments(context.GetRemainingArguments(), rawRemaining)));
}
// Show help?
if (_help?.IsMatch(token.Value) == true)
{
return(new CommandTreeParserResult(
null, new RemainingArguments(context.GetRemainingArguments(), rawRemaining)));
}
// Unexpected option.
throw ParseException.UnexpectedOption(context.Arguments, token);
}
// Does the token value match a command?
var command = _configuration.FindCommand(token.Value);
if (command == null)
{
if (_configuration.DefaultCommand != null)
{
result = ParseCommandParameters(context, _configuration.DefaultCommand, null, tokens);
return(new CommandTreeParserResult(
result, new RemainingArguments(context.GetRemainingArguments(), rawRemaining)));
}
}
// Parse the command.
result = ParseCommand(context, _configuration, null, tokens);
}
else
{
// Is there a default command?
if (_configuration.DefaultCommand != null)
{
result = ParseCommandParameters(context, _configuration.DefaultCommand, null, tokens);
}
}
return(new CommandTreeParserResult(
result, new RemainingArguments(context.GetRemainingArguments(), rawRemaining)));
}