func compressFile()

in log/rollwriter/roll_writer.go [394:422]

• 26 lines of code
• 5 McCabe index (conditional complexity)

func compressFile(src, dst string) (err error) {
	f, err := os.Open(src)
	if err != nil {
		return fmt.Errorf("failed to open file: %v", err)
	}
	defer f.Close()

	gzf, err := os.OpenFile(dst, os.O_CREATE|os.O_TRUNC|os.O_WRONLY, 0666)
	if err != nil {
		return fmt.Errorf("failed to open compressed file: %v", err)
	}
	defer gzf.Close()

	gz := gzip.NewWriter(gzf)
	defer func() {
		gz.Close()
		if err != nil {
			os.Remove(dst)
			err = fmt.Errorf("failed to compress file: %v", err)
		} else {
			os.Remove(src)
		}
	}()

	if _, err := io.Copy(gz, f); err != nil {
		return err
	}
	return nil
}