private async Task DispatchGroup(OperationsSession session, string groupOrRootCommand)
{
// Commands are classes with the following naming convention
// NuCmd.Commands.<CommandName>Command
// OR:
// NuCmd.Commands.<Group>.<CommandName>Command
// Find the group being referenced
IReadOnlyDictionary<string, CommandDefinition> groupMembers;
string commandName;
if (_directory.Groups.TryGetValue(groupOrRootCommand, out groupMembers))
{
commandName = _args.FirstOrDefault();
_args = _args.Skip(1);
}
else
{
commandName = groupOrRootCommand;
groupOrRootCommand = null;
groupMembers = _directory.RootCommands;
}
commandName = commandName ?? String.Empty;
CommandDefinition command;
if (!groupMembers.TryGetValue(commandName, out command))
{
if (String.IsNullOrEmpty(groupOrRootCommand))
{
await _console.WriteErrorLine(String.Format(
CultureInfo.CurrentCulture,
Strings.Program_NoSuchCommand,
commandName));
}
else
{
await _console.WriteErrorLine(String.Format(
CultureInfo.CurrentCulture,
Strings.Program_NoSuchCommandInGroup,
commandName,
groupOrRootCommand));
}
}
else
{
await Dispatch(session, command);
}
}
private async Task Dispatch(OperationsSession session, CommandDefinition definition)
{
ICommand cmd = null;
Exception thrown = null;
try
{
cmd = Args.Parse(definition.Type, _args.ToArray()) as ICommand;
}
catch (AggregateException aex)
{
thrown = aex.InnerException;
}
catch (Exception ex)
{
thrown = ex;
}
if (thrown != null)
{
await _console.WriteErrorLine(thrown.Message);
await new HelpCommand().HelpFor(_console, definition);
}
else if (cmd == null)
{
await _console.WriteErrorLine(
Strings.Program_CommandNotConvertible,
definition.Type.FullName,
typeof(ICommand).FullName);
}
else
{
thrown = null;
try
{
await cmd.Execute(session, _console, definition, _directory);
}
catch (AggregateException aex)
{
thrown = aex.InnerException;
}
catch (OperationCanceledException)
{
// Do nothing when this is thrown, it's just used to jump out of the job.
}
catch (Exception ex)
{
thrown = ex;
}
if (thrown != null)
{
await _console.WriteErrorLine(thrown.ToString());
}
}
}
