parser method
统一解析器, 命令未截止时调用coustomParser
Implementation
void parser(ArgResults argResults) {
if (argResults.command != null) {
final command = commands.firstWhere((element) => element.name == argResults.command!.name);
command.parser(argResults.command!);
return;
}
if (argResults['help']) {
stdout.writeln(argParser.usage);
return;
}
coustomParser(argResults);
}