run method

Future<ProcessResult> run(String executable, List<String> arguments)

Runs executable to the end and returns what it printed.

It runs in its own process group, so the Ctrl+C that stops a playbook doesn't also cut short ffmpeg saving the video, or adb copying it.

Implementation

Future<ProcessResult> run(String executable, List<String> arguments) async {
  if (Platform.isWindows) return Process.run(executable, arguments);
  // A detached process has no exit code of its own, so a shell reports it.
  final Process process = await Process.start('/bin/sh', [
    '-c',
    r'"$@"; echo "nylo-exit:$?" >&2',
    'sh',
    executable,
    ...arguments,
  ], mode: ProcessStartMode.detachedWithStdio);
  await process.stdin.close();
  const Utf8Decoder decoder = Utf8Decoder(allowMalformed: true);
  final List<String> printed = await Future.wait([
    process.stdout.transform(decoder).join(),
    process.stderr.transform(decoder).join(),
  ]);
  final RegExpMatch? exit = RegExp(
    r'nylo-exit:(\d+)\s*$',
  ).firstMatch(printed[1]);
  return ProcessResult(
    process.pid,
    exit == null ? -1 : int.parse(exit.group(1)!),
    printed[0],
    exit == null ? printed[1] : printed[1].substring(0, exit.start),
  );
}