| 7 | ) |
| 8 | |
| 9 | func openIfModified(filename string, since time.Time) (*os.File, time.Time, error) { |
| 10 | f, err := os.Open(filename) |
| 11 | if err != nil { |
| 12 | return nil, time.Time{}, fmt.Errorf("openIfModified(): can't open file %q: %w", filename, err) |
| 13 | } |
| 14 | |
| 15 | fi, err := f.Stat() |
| 16 | if err != nil { |
| 17 | f.Close() |
| 18 | return nil, time.Time{}, fmt.Errorf("openIfModified(): can't stat file %q: %w", filename, err) |
| 19 | } |
| 20 | |
| 21 | modTime := fi.ModTime() |
| 22 | if (since != time.Time{}) && !since.Before(modTime) { |
| 23 | f.Close() |
| 24 | return nil, modTime, nil |
| 25 | } |
| 26 | |
| 27 | return f, modTime, nil |
| 28 | } |