| 421 | } |
| 422 | |
| 423 | func lockFile(filename string) error { |
| 424 | // TODO: find a way to do this with actual file locks. Will |
| 425 | // probably need separate solution for windows and Linux. |
| 426 | |
| 427 | // Make sure the dir exists before we try to create a lock file. |
| 428 | dir := filepath.Dir(filename) |
| 429 | if _, err := os.Stat(dir); os.IsNotExist(err) { |
| 430 | if err = os.MkdirAll(dir, 0755); err != nil { |
| 431 | return err |
| 432 | } |
| 433 | } |
| 434 | f, err := os.OpenFile(lockName(filename), os.O_CREATE|os.O_EXCL, 0) |
| 435 | if err != nil { |
| 436 | return err |
| 437 | } |
| 438 | f.Close() |
| 439 | return nil |
| 440 | } |
| 441 | |
| 442 | func unlockFile(filename string) error { |
| 443 | return os.Remove(lockName(filename)) |