private static bool InternalTryParse <TOptions>(string[] args, ParserOptions parserOptions, out TOptions options, out Exception ex)
where TOptions : new()
{
options = default;
ex = null;
TypeArgumentInfo arguments = null;
try
{
// build a list of properties for the type passed in.
// this will throw for cases where the type is incorrecly annotated with attributes
TypeHelpers.ScanTypeForProperties <TOptions>(out arguments);
// before we do anything, let's expand the response files (if any).
args = ExpandResponseFiles(args);
// short circuit the request for help!
if (args.Length == 1)
{
if (args[0] == HelpGenerator.RequestShortHelpParameter || args[0] == "/?")
{
HelpGenerator.DisplayHelp(HelpFormat.Short, arguments, ColorScheme.Get());
ex = new HelpRequestedException();
return(false);
}
else if (args[0] == HelpGenerator.RequestLongHelpParameter)
{
HelpGenerator.DisplayHelp(HelpFormat.Full, arguments, ColorScheme.Get());
ex = new HelpRequestedException();
return(false);
}
}
// we have groups!
if (!arguments.ArgumentGroups.ContainsKey(string.Empty))
{
return(ParseCommandGroups(args, ref options, arguments, parserOptions));
}
// parse the arguments and build the options object
options = InternalParse <TOptions>(args, 0, arguments.ArgumentGroups[string.Empty], parserOptions);
return(true);
}
catch (Exception innerParserException)
{
ex = new ParserException(innerParserException.Message, innerParserException);
if (parserOptions.LogParseErrorToConsole)
{
string errorFormat = $"[{ColorScheme.Get().ErrorColor}!Error]: {{0}} {{1}}";
Colorizer.WriteLine(errorFormat, ex.Message, Environment.NewLine);
HelpGenerator.DisplayHelp(HelpFormat.Short, arguments, ColorScheme.Get());
}
return(false);
}
}
public static bool TryParse <TOptions>(string[] args, out TOptions options)
where TOptions : new()
{
options = default(TOptions);
TypeArgumentInfo arguments = null;
try
{
// build a list of properties for the type passed in.
// this will throw for cases where the type is incorrecly annotated with attributes
TypeHelpers.ScanTypeForProperties <TOptions>(out arguments);
// before we do anything, let's expand the response files (if any).
args = ExpandResponseFiles(args);
// short circuit the request for help!
if (args.Length == 1)
{
if (args[0] == HelpGenerator.RequestShortHelpParameter || args[0] == "/?")
{
HelpGenerator.DisplayHelp(HelpFormat.Short, arguments);
return(false);
}
else if (args[0] == HelpGenerator.RequestLongHelpParameter)
{
HelpGenerator.DisplayHelp(HelpFormat.Full, arguments);
return(false);
}
}
// we have groups!
if (!arguments.ArgumentGroups.ContainsKey(string.Empty))
{
return(ParseCommandGroups(args, ref options, arguments));
}
// parse the arguments and build the options object
options = InternalParse <TOptions>(args, 0, arguments.ArgumentGroups[string.Empty]);
return(true);
}
catch (Exception ex)
{
Colorizer.WriteLine($"[Red!Error]: {ex.Message} {Environment.NewLine}");
HelpGenerator.DisplayHelp(HelpFormat.Short, arguments);
return(false);
}
}
/// <summary>
/// Display the help based on the <typeparamref name="TOptions"/> type provided
/// </summary>
/// <typeparam name="TOptions">The type for which to generate the help.</typeparam>
/// <param name="helpFormat">Describes the level of details to generate for the help message.</param>
public static void DisplayHelp <TOptions>(HelpFormat helpFormat = HelpFormat.Short)
{
if (helpFormat != HelpFormat.Short && helpFormat != HelpFormat.Full)
{
throw new ArgumentException("Unrecognized help format", nameof(helpFormat));
}
try
{
// build a list of properties for the type passed in.
// this will throw for cases where the type is incorrecly annotated with attributes
TypeHelpers.ScanTypeForProperties <TOptions>(out TypeArgumentInfo arguments);
// If we get here, the options type is well defined, so let's display the help.
HelpGenerator.DisplayHelp(helpFormat, arguments);
}
catch (Exception ex)
{
// If we were asked to display the help and something went wrong, display the error that went wrong.
Colorizer.WriteLine($"[Red!Error]: {ex.Message} {Environment.NewLine}");
}
}
/// <summary>
/// Display the help based on the <typeparamref name="TOptions"/> type provided
/// </summary>
/// <typeparam name="TOptions">The type for which to generate the help.</typeparam>
/// <param name="helpFormat">Describes the level of details to generate for the help message.</param>
public static void DisplayHelp <TOptions>(HelpFormat helpFormat = HelpFormat.Short)
{
if (helpFormat != HelpFormat.Short && helpFormat != HelpFormat.Full)
{
throw new ParserException($"Unrecognized help format {helpFormat}", null);
}
try
{
// build a list of properties for the type passed in.
// this will throw for cases where the type is incorrecly annotated with attributes
TypeHelpers.ScanTypeForProperties <TOptions>(out TypeArgumentInfo arguments);
// If we get here, the options type is well defined, so let's display the help.
HelpGenerator.DisplayHelp(helpFormat, arguments, ColorScheme.Get());
}
catch (Exception ex)
{
string errorFormat = $"[{ColorScheme.Get().ErrorColor}!Error]: {{0}} {{1}}";
// If we were asked to display the help and something went wrong, display the error that went wrong.
Colorizer.WriteLine(errorFormat, ex.Message, Environment.NewLine);
}
}