/// <summary>
/// Internal helper method for parsing arguments
/// </summary>
/// <returns>True if all arguments were successfully parsed</returns>
internal bool Parse()
{
while (++Position < Arguments.Length)
{
Tuple <string, string> param = ArgumentParserUtils.ParseParam(Arguments[Position]);
if (param == null || !Data.ContainsKey(param.Item1))
{
if (Arguments[Position].Equals("/?"))
{
NeedHelp = true;
return(false);
}
LogHelper.LogError("Unrecogized parameter '{0}'.", Arguments[Position]);
return(false);
}
if (param.Item1.Equals("h", StringComparison.OrdinalIgnoreCase) ||
param.Item1.Equals("help", StringComparison.OrdinalIgnoreCase))
{
NeedHelp = true;
return(false);
}
ArgumentData argumentData = Data[param.Item1];
if (argumentData.Seen)
{
LogHelper.LogError("Argument '{0}' re-defined with value '{1}'.", param.Item1, param.Item2);
return(false);
}
argumentData.Seen = true;
if (!HandleArgument(argumentData, param.Item2))
{
return(false);
}
}
foreach (ArgumentData argumentData in Data.Values.Where(d => !d.Seen))
{
if (!argumentData.Optional)
{
LogHelper.LogError("Argument [{0}] is required.", argumentData.Name);
return(false);
}
if (!HandleDefaultValue(argumentData))
{
return(false);
}
}
return(true);
}
/// <summary>
/// Generates help text based on custom arguments class
/// </summary>
internal static string Usage()
{
IDictionary <string, ArgumentData> data = ArgumentParserUtils.GetArgumentData <T>();
DetailsAttribute detailsAttr = typeof(T).GetCustomAttribute <DetailsAttribute>();
string details = detailsAttr != null ? detailsAttr.Details : string.Empty;
ITemplate template = new CommandLineUsage
{
Name = Process.GetCurrentProcess().ProcessName,
Description = details,
Required = data.Values.Where(x => !x.Optional).Distinct(),
Optional = data.Values.Where(x => x.Optional).Distinct(),
};
return(template.Print());
}
/// <summary>
/// Returns an instance of custom parameters class
/// </summary>
/// <param name="arg">List of arguments to parse</param>
/// <returns>Parsed arguments</returns>
public static T Parse(string[] arg)
{
var parser = new ArgumentParser <T>(arg, ArgumentParserUtils.GetArgumentData <T>());
if (!parser.Parse())
{
// TODO: Remove calls to PrintUsage from consumers and uncomment below
//if(parser.NeedHelp)
//{
// PrintUsage();
//}
return(default(T));
}
return(parser.Result);
}
/// <summary>
/// Handler for single param arguments
/// </summary>
/// <param name="argument"><see cref="ArgumentData"/></param>
/// <param name="value">Value of argument</param>
/// <returns>True if it was successfully handled</returns>
private bool HandleParam(ArgumentData argument, string value)
{
// Param is specified as key:value or key=value
if (!string.IsNullOrWhiteSpace(value))
{
return(Result.TrySetPropertyValue(argument.Property, value));
}
// Value should be the next argumentKey
if (++Position < Arguments.Length)
{
Tuple <string, string> nextParam = ArgumentParserUtils.ParseParam(Arguments[Position]);
if (nextParam == null)
{
return(Result.TrySetPropertyValue(argument.Property, Arguments[Position]));
}
}
Position--;
LogHelper.LogError("Value for parameter '{0}' not specified", argument.Key);
return(false);
}