private void PrintVerbHelpText(Type verbType, string?commandLineVerb)
{
var verbAttribute = verbType.GetCustomAttribute <VerbAttribute>();
if (verbAttribute != null)
{
var verb = NamingHelper.MakeKebabCase(verbAttribute.VerbName);
Console.Write(_localizableStrings.UsageHeader);
Console.WriteLine($"{verb} [options]");
Console.WriteLine();
var optionInfoList = verbType.GetProperties(BindingFlags.Instance | BindingFlags.Public)
.Select(x => NameDescription.FromPropertyInfo(x, _localizableStrings, _resourceManager))
.OfType <NameDescription>()
.ToList();
var columnLength = optionInfoList.Count == 0 ? 0 : optionInfoList.Max(x => x.Name.Length);
if (optionInfoList.Count > 0)
{
Console.WriteLine(_localizableStrings.OptionsHeader);
}
foreach (var x in optionInfoList)
{
Console.Write(GetColumnString(x.Name, columnLength));
Console.WriteLine(x.Description);
}
}
else if (!string.IsNullOrWhiteSpace(commandLineVerb))
{
PrintUnknownVerbHelpText(commandLineVerb);
}
}
private void PrintHelpText(IReadOnlyList <Type> relatedTypes)
{
var selfAssembly = typeof(GnuFilter).Assembly;
var verbInfoList = relatedTypes
.Select(x => NameDescription.FromVerbType(x, _resourceManager))
.OfType <NameDescription>()
.ToList();
var mergedOptionInfoList = relatedTypes
.Where(x => !x.IsDefined(typeof(VerbAttribute)))
.SelectMany(x => NameDescription.EnumerateFromVerbType(x, _localizableStrings, _resourceManager)).ToList();
var maxVerbTextLength = verbInfoList.Count == 0 ? 0 : verbInfoList.Max(x => x.Name.Length);
var maxOptionTextLength = mergedOptionInfoList.Count == 0 ? 0 : mergedOptionInfoList.Max(x => x.Name.Length);
var columnLength = Math.Max(maxOptionTextLength, maxVerbTextLength);
columnLength = Math.Max(12, columnLength);
Console.Write(_localizableStrings.UsageHeader);
if (verbInfoList.Count > 0)
{
Console.WriteLine("[options] [command] [command-options] [arguments]");
}
else
{
Console.WriteLine("[options] [arguments]");
}
Console.WriteLine();
if (mergedOptionInfoList.Count > 0)
{
Console.WriteLine(_localizableStrings.OptionsHeader);
}
foreach (var x in mergedOptionInfoList)
{
Console.Write(GetColumnString(x.Name, columnLength));
Console.WriteLine(x.Description);
}
Console.WriteLine();
if (verbInfoList.Count > 0)
{
Console.WriteLine(_localizableStrings.CommandHeader);
}
foreach (var x in verbInfoList)
{
Console.Write(GetColumnString(x.Name, columnLength));
Console.WriteLine(x.Description);
}
}