def run_shell(cmd, allow_non_zero=False, stderr=None):
  if stderr is None:
    stderr = sys.stdout
  if allow_non_zero:
    try:
      output = subprocess.check_output(cmd, stderr=stderr)
    except subprocess.CalledProcessError as e:
      output = e.output
  else:
    output = subprocess.check_output(cmd, stderr=stderr)
  return output.decode('UTF-8').strip()


def cygpath(path):
  """Convert path from posix to windows."""

	}

	// Disable any ssh connection pooling by Git.
	// If a Git subprocess forks a child into the background to cache a new connection,
	// that child keeps stdout/stderr open. After the Git subprocess exits,
	// os/exec expects to be able to read from the stdout/stderr pipe
	// until EOF to get all the data that the Git subprocess wrote before exiting.
	// The EOF doesn't come until the child exits too, because the child

	}
	for _, runName := range t.runNames {
		if runName == name {
			return true
		}
	}
	return false
}

func (t *tester) maybeLogMetadata() error {
	if t.compileOnly {
		// We need to run a subprocess to log metadata. Don't do that
		// on compile-only runs.
		return nil
	}
	t.out("Test execution environment.")
	// Helper binary to print system metadata (CPU model, etc). This is a

	// ETXTBSY errors on Unix platforms (see https://go.dev/issue/22315).
	//
	// Since we know what causes those, and we know that they should resolve
	// quickly (the ETXTBSY error will resolve as soon as the subprocess
	// holding the descriptor open reaches its 'exec' call), we retry them
	// in a loop.

	var (
		cmd            *exec.Cmd
		t0             time.Time
		cancelKilled   = false

		// test would think it could take over global state that way.
		//
		// This fix only helps programs where the output is coming directly
		// from Go code. It does not help programs in which a subprocess is
		// writing to stderr or stdout at the same time that a Go test is writing output.
		// It also does not help when the output is coming from the runtime,

// external network in parallel. If non-nil, it contains one buffer slot per
// test (send to acquire), with a low enough limit that the overall number of
// connections (summed across subprocesses) stays at or below base.NetLimit.
var netTestSem chan struct{}

var exeSuffix string = func() string {
	if runtime.GOOS == "windows" {
		return ".exe"
	}
	return ""
}()