execute method
Implementation
@override
Future<int> execute(List<String> arguments) async {
if (arguments.length > 1) {
Console.error('terminate-port accepts at most one port.');
return ExitCode.usage;
}
final explicit = arguments.isEmpty ? null : int.tryParse(arguments.single);
if (arguments.isNotEmpty && explicit == null) {
Console.error('Port must be an integer.');
return ExitCode.usage;
}
final port = explicit ?? _portFromEnv() ?? 8000;
final success = await runCommand(port);
if (!success) return ExitCode.failure;
Console.success('Port $port is available');
return ExitCode.success;
}