private static CommandSettings CreateSettings(ITypeResolver resolver, Type settingsType)
{
if (resolver.Resolve(settingsType) is CommandSettings settings)
{
return(settings);
}
throw CommandParseException.CouldNotCreateSettings(settingsType);
}
private static IEnumerable <CommandTreeToken> ScanOptions(CommandTreeTokenizerContext context, TextBuffer reader)
{
var result = new List <CommandTreeToken>();
var position = reader.Position;
reader.Consume('-');
context.AddRemaining('-');
if (!reader.TryPeek(out var character))
{
var token = new CommandTreeToken(CommandTreeToken.Kind.ShortOption, position, "-", "-");
throw CommandParseException.OptionHasNoName(reader.Original, token);
}
switch (character)
{
case '-':
var option = ScanLongOption(context, reader, position);
if (option != null)
{
result.Add(option);
}
break;
default:
result.AddRange(ScanShortOptions(context, reader, position));
break;
}
if (reader.TryPeek(out character))
{
// Encountered a separator?
if (character == '=' || character == ':')
{
reader.Read(); // Consume
context.AddRemaining(character);
if (!reader.TryPeek(out _))
{
var token = new CommandTreeToken(CommandTreeToken.Kind.String, reader.Position, "=", "=");
throw CommandParseException.OptionValueWasExpected(reader.Original, token);
}
result.Add(ScanString(context, reader));
}
}
return(result);
}
public ICommand CreateCommand(ITypeResolver resolver)
{
if (Command.Delegate != null)
{
return(new DelegateCommand(Command.Delegate));
}
if (resolver.Resolve(Command.CommandType) is ICommand command)
{
return(command);
}
throw CommandParseException.CouldNotCreateCommand(Command.CommandType);
}
private static IEnumerable <CommandTreeToken> ScanShortOptions(CommandTreeTokenizerContext context, TextBuffer reader, int position)
{
var result = new List <CommandTreeToken>();
while (!reader.ReachedEnd)
{
var current = reader.Peek();
if (char.IsWhiteSpace(current))
{
break;
}
// Encountered a separator?
if (current == '=' || current == ':')
{
break;
}
if (char.IsLetter(current))
{
context.AddRemaining(current);
reader.Read(); // Consume
var value = current.ToString(CultureInfo.InvariantCulture);
result.Add(result.Count == 0
? new CommandTreeToken(CommandTreeToken.Kind.ShortOption, position, value, $"-{value}")
: new CommandTreeToken(CommandTreeToken.Kind.ShortOption, position + result.Count, value, value));
}
else
{
// Create a token representing the short option.
var tokenPosition = position + 1 + result.Count;
var represntation = current.ToString(CultureInfo.InvariantCulture);
var token = new CommandTreeToken(CommandTreeToken.Kind.ShortOption, tokenPosition, represntation, represntation);
throw CommandParseException.InvalidShortOptionName(reader.Original, token);
}
}
if (result.Count > 1)
{
foreach (var item in result)
{
item.IsGrouped = true;
}
}
return(result);
}
public CommandTreeToken Expect(CommandTreeToken.Kind expected)
{
if (Current == null)
{
throw CommandParseException.ExpectedTokenButFoundNull(expected);
}
var found = Current.TokenKind;
if (expected != found)
{
throw CommandParseException.ExpectedTokenButFoundOther(expected, found);
}
return(Current);
}
private void ParseOption(
CommandTreeParserContext context,
CommandTreeTokenStream stream,
CommandTreeToken token,
CommandTree node,
bool isLongOption)
{
// Consume the option token.
stream.Consume(isLongOption ? CommandTreeToken.Kind.LongOption : CommandTreeToken.Kind.ShortOption);
if (context.State == State.Normal)
{
// Find the option.
var option = node.FindOption(token.Value, isLongOption, CaseSensitivity);
if (option != null)
{
node.Mapped.Add(new MappedCommandParameter(
option, ParseOptionValue(context, stream, token, node, option)));
return;
}
// Help?
if (_help?.IsMatch(token.Value) == true)
{
node.ShowHelp = true;
return;
}
}
if (context.State == State.Remaining)
{
ParseOptionValue(context, stream, token, node, null);
return;
}
if (context.ParsingMode == ParsingMode.Strict)
{
throw CommandParseException.UnknownOption(context.Arguments, token);
}
else
{
ParseOptionValue(context, stream, token, node, null);
}
}
private static CommandSettings CreateSettings(ITypeResolver resolver, Type settingsType)
{
try
{
if (resolver.Resolve(settingsType) is CommandSettings settings)
{
return settings;
}
}
catch
{
// ignored
}
if (Activator.CreateInstance(settingsType) is CommandSettings instance)
{
return instance;
}
throw CommandParseException.CouldNotCreateSettings(settingsType);
}
private static CommandTreeToken ScanLongOption(CommandTreeTokenizerContext context, TextBuffer reader, int position)
{
reader.Consume('-');
context.AddRemaining('-');
if (reader.ReachedEnd)
{
// Rest of the arguments are remaining ones.
context.Mode = Mode.Remaining;
return(new CommandTreeToken(CommandTreeToken.Kind.Remaining, position, "--", "--"));
}
var name = ScanString(context, reader, new[] { '=', ':' });
// Perform validation of the name.
if (name.Value.Length == 0)
{
throw CommandParseException.LongOptionNameIsMissing(reader, position);
}
if (name.Value.Length == 1)
{
throw CommandParseException.LongOptionNameIsOneCharacter(reader, position, name.Value);
}
if (char.IsDigit(name.Value[0]))
{
throw CommandParseException.LongOptionNameStartWithDigit(reader, position, name.Value);
}
for (var index = 0; index < name.Value.Length; index++)
{
if (!char.IsLetterOrDigit(name.Value[index]) && name.Value[index] != '-' && name.Value[index] != '_')
{
throw CommandParseException.LongOptionNameContainSymbol(reader, position + 2 + index, name.Value[index]);
}
}
return(new CommandTreeToken(CommandTreeToken.Kind.LongOption, position, name.Value, $"--{name.Value}"));
}
private static CommandTreeToken ScanQuotedString(CommandTreeTokenizerContext context, TextBuffer reader)
{
var position = reader.Position;
context.FlushRemaining();
reader.Consume('\"');
var builder = new StringBuilder();
var terminated = false;
while (!reader.ReachedEnd)
{
var character = reader.Peek();
if (character == '\"')
{
terminated = true;
reader.Read();
break;
}
builder.Append(reader.Read());
}
if (!terminated)
{
var unterminatedQuote = builder.ToString();
var token = new CommandTreeToken(CommandTreeToken.Kind.String, position, unterminatedQuote, $"\"{unterminatedQuote}");
throw CommandParseException.UnterminatedQuote(reader.Original, token);
}
var quotedString = builder.ToString();
// Add to the context
context.AddRemaining(quotedString);
return(new CommandTreeToken(
CommandTreeToken.Kind.String,
position, quotedString,
quotedString));
}
private CommandTree ParseCommand(
CommandTreeParserContext context,
ICommandContainer current,
CommandTree?parent,
CommandTreeTokenStream stream)
{
// Find the command.
var commandToken = stream.Consume(CommandTreeToken.Kind.String);
if (commandToken == null)
{
throw new CommandRuntimeException("Could not consume token when parsing command.");
}
var command = current.FindCommand(commandToken.Value, CaseSensitivity);
if (command == null)
{
throw CommandParseException.UnknownCommand(_configuration, parent, context.Arguments, commandToken);
}
return(ParseCommandParameters(context, command, parent, stream));
}
public CommandTreeParserResult Parse(IEnumerable <string> args)
{
var context = new CommandTreeParserContext(args, _parsingMode);
var tokenizerResult = CommandTreeTokenizer.Tokenize(context.Arguments);
var tokens = tokenizerResult.Tokens;
var rawRemaining = tokenizerResult.Remaining;
var result = default(CommandTree);
if (tokens.Count > 0)
{
// Not a command?
var token = tokens.Current;
if (token == null)
{
// Should not happen, but the compiler isn't
// smart enough to realize this...
throw new CommandRuntimeException("Could not get current token.");
}
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 CommandParseException.UnexpectedOption(context.Arguments, token);
}
// Does the token value match a command?
var command = _configuration.FindCommand(token.Value, CaseSensitivity);
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)));
}
private string?ParseOptionValue(
CommandTreeParserContext context,
CommandTreeTokenStream stream,
CommandTreeToken token,
CommandTree current,
CommandParameter?parameter)
{
var value = default(string);
// Parse the value of the token (if any).
var valueToken = stream.Peek();
if (valueToken?.TokenKind == CommandTreeToken.Kind.String)
{
var parseValue = true;
if (token.TokenKind == CommandTreeToken.Kind.ShortOption && token.IsGrouped)
{
parseValue = false;
}
if (context.State == State.Normal && parseValue)
{
// Is this a command?
if (current.Command.FindCommand(valueToken.Value, CaseSensitivity) == null)
{
if (parameter != null)
{
if (parameter.ParameterKind == ParameterKind.Flag)
{
if (!CliConstants.AcceptedBooleanValues.Contains(valueToken.Value, StringComparer.OrdinalIgnoreCase))
{
// Flags cannot be assigned a value.
throw CommandParseException.CannotAssignValueToFlag(context.Arguments, token);
}
}
value = stream.Consume(CommandTreeToken.Kind.String)?.Value;
}
else
{
// Unknown parameter value.
value = stream.Consume(CommandTreeToken.Kind.String)?.Value;
// In relaxed parsing mode?
if (context.ParsingMode == ParsingMode.Relaxed)
{
context.AddRemainingArgument(token.Value, value);
}
}
}
}
else
{
context.AddRemainingArgument(token.Value, parseValue ? valueToken.Value : null);
}
}
else
{
if (context.State == State.Remaining || context.ParsingMode == ParsingMode.Relaxed)
{
context.AddRemainingArgument(token.Value, null);
}
}
// No value?
if (context.State == State.Normal)
{
if (value == null && parameter != null)
{
if (parameter.ParameterKind == ParameterKind.Flag)
{
value = "true";
}
else
{
if (parameter is CommandOption option)
{
if (parameter.IsFlagValue())
{
return(null);
}
throw CommandParseException.OptionHasNoValue(context.Arguments, token, option);
}
else
{
// This should not happen at all. If it does, it's because we've added a new
// option type which isn't a CommandOption for some reason.
throw new InvalidOperationException($"Found invalid parameter type '{parameter.GetType().FullName}'.");
}
}
}
}
return(value);
}
private void ParseString(
CommandTreeParserContext context,
CommandTreeTokenStream stream,
CommandTree node)
{
if (context.State == State.Remaining)
{
stream.Consume(CommandTreeToken.Kind.String);
return;
}
var token = stream.Expect(CommandTreeToken.Kind.String);
// Command?
var command = node.Command.FindCommand(token.Value, CaseSensitivity);
if (command != null)
{
if (context.State == State.Normal)
{
node.Next = ParseCommand(context, node.Command, node, stream);
}
return;
}
// Current command has no arguments?
if (!node.HasArguments())
{
throw CommandParseException.UnknownCommand(_configuration, node, context.Arguments, token);
}
// Argument?
var parameter = node.FindArgument(context.CurrentArgumentPosition);
if (parameter == null)
{
// No parameters left. Any commands after this?
if (node.Command.Children.Count > 0 || node.Command.IsDefaultCommand)
{
throw CommandParseException.UnknownCommand(_configuration, node, context.Arguments, token);
}
throw CommandParseException.CouldNotMatchArgument(context.Arguments, token);
}
// Yes, this was an argument.
if (parameter.ParameterKind == ParameterKind.Vector)
{
// Vector
var current = stream.Current;
while (current?.TokenKind == CommandTreeToken.Kind.String)
{
var value = stream.Consume(CommandTreeToken.Kind.String)?.Value;
node.Mapped.Add(new MappedCommandParameter(parameter, value));
current = stream.Current;
}
}
else
{
// Scalar
var value = stream.Consume(CommandTreeToken.Kind.String)?.Value;
node.Mapped.Add(new MappedCommandParameter(parameter, value));
context.IncreaseArgumentPosition();
}
}
