/
fs.go
64 lines (57 loc) · 1.05 KB
/
fs.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
package itunes
import (
"errors"
"fmt"
"os"
"path/filepath"
)
var serializationRoot string
func SetSerializationRoot(dn string) {
serializationRoot = dn
}
type Serializable interface {
Serialize(int) ([]byte, error)
SerializationPath() []string
}
func EnsureDir(fn string) error {
dn := filepath.Dir(fn)
st, err := os.Stat(dn)
if err != nil {
if !os.IsNotExist(err) {
return err
}
err = os.MkdirAll(dn, os.FileMode(0755))
if err != nil {
return err
}
return nil
}
if !st.IsDir() {
return fmt.Errorf("%s exists and is not a directory", dn)
}
return nil
}
func Serialize(obj Serializable) error {
data, err := obj.Serialize(2)
if err != nil {
return err
}
parts := obj.SerializationPath()
if parts == nil || len(parts) == 0 {
return errors.New("no serialization path")
}
fn := filepath.Join(serializationRoot, filepath.Join(parts...) + ".pb")
err = EnsureDir(fn)
if err != nil {
return err
}
f, err := os.Create(fn)
if f != nil {
defer f.Close()
}
if err != nil {
return err
}
_, err = f.Write(data)
return err
}