public async Task Invoke()
{
SubCommandAttribute cmdAttr = this.GetSubCommandAttribute(out TCommandExecutor commandExecutor, out IEnumerator <string> argumentEnumerator);
if (cmdAttr == null && this.IsHelp())
{
this.ShowHelp();
return;
}
//if (cmdAttr == null) {
// IEnumerable<string> args = Environment.GetCommandLineArgs().Skip(1);
// string strCmd = args.FirstOrDefault();
// throw new CommandLineException($"Invalid command: {strCmd}");
//}
if (this.IsHelp(cmdAttr))
{
this.ShowHelp(cmdAttr);
return;
}
if (cmdAttr != null)
{
SubCommand cmd = this.GetSubCommand(commandExecutor, cmdAttr.Type, argumentEnumerator);
await cmd.Run();
}
}
/// <summary>
/// Parse options from current command line
/// </summary>
/// <returns></returns>
public SubCommand GetSubCommand(TCommandExecutor parent, Type subCmdType, IEnumerator <string> argumentEnumerator)
{
SubCommand cmd = (SubCommand)System.Activator.CreateInstance(subCmdType);
SubCommand <TCommandExecutor> strongTypedCmd = cmd as SubCommand <TCommandExecutor>;
if (strongTypedCmd != null)
{
strongTypedCmd.Parent = parent;
}
//Validate command options class
this.ValidateArguments();
var attrs = subCmdType.GetProperties().Where(p => p.GetCustomAttribute <CommandAbstractAttribute>(true) != null)
.ToDictionary(p => p, p => p.GetCustomAttribute <CommandAbstractAttribute>(true));
while (argumentEnumerator.MoveNext())
{
if (!attrs.Any(kvp => kvp.Value.TryConsumeArgs(cmd, kvp.Key, argumentEnumerator)))
{
throw new ArgumentException($"Invalid argument '{argumentEnumerator.Current}'");
}
}
return(cmd);
}
