internal static int RunCommand(object command, CommandMetadata metadata, string[] args)
{
if (metadata.Options == null)
{
try
{
return Run(command, metadata, null);
}
catch (ShellCommandHelpException helpException)
{
helpException.ParsingResult = new ParsingResult(new List<ParsingError>());
throw;
}
}
ParsingResult parsingResult;
object options = null;
if (metadata.Type == metadata.Options.Type)
parsingResult = CommandOptionsParser.Parse(metadata.Options, command, args);
else
{
options = Activator.CreateInstance(metadata.Options.Type);
parsingResult = CommandOptionsParser.Parse(metadata.Options, options, args);
}
if (!parsingResult) throw new ShellCommandHelpException(command) { ParsingResult = parsingResult };
try
{
return Run(command, metadata, options);
}
catch (ShellCommandHelpException helpException)
{
helpException.ParsingResult = parsingResult;
throw;
}
}
private static int Run(object command, CommandMetadata metadata, object options)
{
object returnValue;
try
{
returnValue = options == null ? metadata.RunnableMethod.Invoke(command, new object[] { }) : metadata.RunnableMethod.Invoke(command, new[] { options });
}
catch (TargetInvocationException invocationError)
{
throw invocationError.InnerException;
}
return returnValue != null ? (int)returnValue : 0;
}
//[GetHelp]
public string GetUsage(CommandMetadata metadata, ParsingResult parsingResult)
{
return new StringBuilder(metadata.Name).AppendLine().AppendLine(metadata.Description)
.AppendLine(string.Join(Environment.NewLine,
parsingResult.Errors.Select(
err =>
(err.OptionMetadata.IsNamedOption
? ((CommandNamedOptionMetadata)err.OptionMetadata).ShortName +
((CommandNamedOptionMetadata)err.OptionMetadata).LongName
: string.Empty) + " " + err.OptionMetadata.ToString() + " - " + err.ParsingErrorBase.ToString()))).ToString();
}
private static void ShowCommandHelp(object command, CommandMetadata metadata, ParsingResult parsingResult)
{
// ReSharper disable PossibleNullReferenceException
if (metadata.HelpMethod == null) HelpBuilder.PrintCommandHelp(Output, metadata, AssemblyInfo, parsingResult);
else
{
var parameters = new List<object>();
foreach (var type in metadata.HelpMethod.GetParameters().Select(param => param.ParameterType))
if (type == typeof(CommandMetadata)) parameters.Add(metadata);
else parameters.Add(parsingResult);
Output.WriteLine(metadata.HelpMethod.Invoke(command, parameters.ToArray()));
}
// ReSharper restore PossibleNullReferenceException
}
