public static void DisplayVersion(this ParseResultBase parseResult)
{
var parseResultType = parseResult.GetType();
var parserAttribute = parseResultType.GetCustomAttribute <CommandLineParserAttribute>();
var programAssembly = parserAttribute.ProgramAssemblyType.Assembly;
var assemblyNameParts = programAssembly.GetNameParts();
var assemblyAttributes = programAssembly.GetAttributes();
var assemblyName = assemblyNameParts.AssemblyName;
Console.WriteLine("{0} v{1}", assemblyName, assemblyAttributes.Version);
Console.WriteLine(assemblyAttributes.Company);
Console.WriteLine(assemblyAttributes.Copyright);
Console.Write("Press any key to continue . . .");
Console.ReadKey();
parseResult.VersionDisplayed = true;
}
public static void DisplayHelp(this ParseResultBase parseResult)
{
var parseResultType = parseResult.GetType();
var parserAttribute = parseResultType.GetCustomAttribute <CommandLineParserAttribute>();
var switchType = parserAttribute.SwitchType;
var commandLineDescription = parserAttribute.Description;
var programAssembly = parserAttribute.ProgramAssemblyType.Assembly;
var assemblyNameParts = programAssembly.GetNameParts();
var assemblyAttributes = programAssembly.GetAttributes();
var assemblyName = assemblyNameParts.AssemblyName;
var syntaxBuilder = new StringBuilder();
var switchListingBuilder = new StringBuilder();
var switches = new List <CommandLineSwitchAttribute>();
var switchNames = new List <string>();
int maxSwitchName;
int x;
foreach (var match in commandLineDescription.GetAttributeStringExpressionMatches())
{
var expression = match.GetGroupValue("expression");
switch (expression)
{
case "AssemblyProduct":
commandLineDescription = match.Replace(commandLineDescription, assemblyAttributes.Product ?? assemblyName);
break;
case "AssemblyName":
commandLineDescription = match.Replace(commandLineDescription, assemblyName);
break;
default:
DebugUtils.Break();
break;
}
}
Console.WriteLine(commandLineDescription);
Console.WriteLine();
Console.WriteLine("Syntax:");
syntaxBuilder.Append(assemblyName);
foreach (var switchProperty in parserAttribute.SwitchType.GetConstants())
{
if (switchProperty.HasCustomAttribute <CommandLineSwitchAttribute>())
{
var switchAttribute = switchProperty.GetCustomAttribute <CommandLineSwitchAttribute>();
var switchName = (string)switchProperty.GetValue(null);
syntaxBuilder.AppendFormat(" [/{0}]", switchName);
switchNames.Add(switchName);
switches.Add(switchAttribute);
}
}
maxSwitchName = switchNames.Max(n => n.Length);
x = 0;
foreach (var switchAttribute in switches)
{
var switchName = switchNames.ElementAt(x);
var padding = maxSwitchName + (switchAttribute.DescriptionLeftPaddingTabCount * 8);
var attributeDescription = switchAttribute.Description;
var switchNamePadded = switchName.PadRight(padding, ' ');
foreach (var match in attributeDescription.GetAttributeStringExpressionMatches())
{
var expression = match.GetGroupValue("expression");
var property = switchType.GetProperty(expression);
var value = (string)property.GetValue(null);
var lines = value.GetLines().Select(l => ' '.Repeat(12 + switchNamePadded.Length) + l);
var ending = attributeDescription.RegexGet(match.Value + @"(?<ending>[^\{]*)", "ending");
value = lines.Join();
attributeDescription = match.Replace(attributeDescription, value);
if (ending.Length > 0)
{
attributeDescription = attributeDescription.Replace(ending, "\r\n" + ' '.Repeat(4 + switchNamePadded.Length) + ending);
}
}
switchListingBuilder.AppendLineFormat(@"{0}/{1}{2}", ' '.Repeat(4), switchNamePadded, attributeDescription);
x++;
}
Console.WriteLine(syntaxBuilder);
Console.WriteLine();
Console.WriteLine(switchListingBuilder);
Console.Write("Press any key to continue . . .");
Console.ReadKey();
parseResult.HelpDisplayed = true;
}