/// <summary>
/// Adds a command line argument with values that should be parsable into <typeparamref name="T" />.
/// </summary>
/// <param name="app"></param>
/// <param name="name"></param>
/// <param name="description"></param>
/// <param name="multipleValues"></param>
/// <returns></returns>
public static CommandArgument <T> Argument <T>(this CommandLineApplication app, string name, string description, bool multipleValues = false)
=> app.Argument <T>(name, description, _ => { }, multipleValues);
private static void _ConfigureInvoker(CommandLineApplication command, Type type, MethodInfo methodInfo)
{
var helpOpt = command.HelpOption();
var parameters = methodInfo.GetParameters();
foreach (var param in parameters)
{
if (param.GetCustomAttribute <ConventionOptionAttribute>() != null)
{
_RegisterOption(command, param.ParameterType, _PascalToKebab(param.Name), param.GetCustomAttribute <ConventionDescriptionAttribute>()?.Text ?? "", param.GetCustomAttribute <ConventionIsRequiredAttribute>() != null);
}
else if (_IsExpectingSingleValue(param.ParameterType) || _IsExpectingMultiValue(param.ParameterType))
{
var desc = param.GetCustomAttribute <ConventionDescriptionAttribute>();
var description = desc?.Text ?? "";
command.Argument(param.Name, description, _IsExpectingMultiValue(param.ParameterType));
}
}
command.OnExecute(() =>
{
if (helpOpt.HasValue())
{
return(0);
}
CancellationTokenSource cts = null;
var obj = Activator.CreateInstance(type);
var alloptions = command.GetOptions();
foreach (var prop in type.GetProperties())
{
var option = alloptions.FirstOrDefault(opt => opt.LongName == _PascalToKebab(prop.Name));
if (option != null)
{
prop.SetValue(obj, _ExtractValueFromOption(prop.PropertyType, option));
}
}
if (type.GetMethod("Initialize") != null)
{
type.GetMethod("Initialize").Invoke(obj, null);
}
var allArgs = command.Arguments;
var handlerParams = new List <object>();
foreach (var param in methodInfo.GetParameters())
{
var arg = allArgs.FirstOrDefault(a => a.Name == param.Name);
var option = alloptions.FirstOrDefault(opt => opt.LongName == _PascalToKebab(param.Name));
object valueToAdd = null;
if (arg != null)
{
if (arg.MultipleValues)
{
valueToAdd = _ParseMultiValue(param.ParameterType, arg.Values);
}
else if (param.HasDefaultValue && arg.Value == null)
{
valueToAdd = param.DefaultValue;
}
else
{
valueToAdd = _ParseSingleValue(param.ParameterType, arg.Value);
}
}
else if (option != null)
{
if (param.HasDefaultValue && option.HasValue() == false)
{
valueToAdd = param.DefaultValue;
}
else
{
valueToAdd = _ExtractValueFromOption(param.ParameterType, option);
}
}
else if (param.ParameterType == typeof(CancellationToken))
{
if (cts == null)
{
cts = new CancellationTokenSource();
}
valueToAdd = cts.Token;
}
else
{
if (type.GetMethod("ResolveType") != null)
{
valueToAdd = type.GetMethod("ResolveType").Invoke(obj, new[] { param.ParameterType });
}
else
{
throw new Exception("Cannot resolve parameter type");
}
}
if (param.GetCustomAttribute <ConventionIsRequiredAttribute>() != null && valueToAdd == null)
{
throw new Exception($"{param.Name} is required");
}
handlerParams.Add(valueToAdd);
}
var res = methodInfo.Invoke(obj, handlerParams.ToArray());
if (res.GetType() == typeof(Task <int>))
{
var task = (Task <int>)res;
System.Console.CancelKeyPress += (sender, e) =>
{
cts?.Cancel();
Task.WaitAll(new[] { task }, 10000);
};
AppDomain.CurrentDomain.ProcessExit += (sender, e) =>
{
cts?.Cancel();
Task.WaitAll(new[] { task }, 10000);
};
Task.WaitAll(task);
return(task.Result);
}
else
{
return((int)res);
}
});
}