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
|
package aufs
import (
"bufio"
"io/ioutil"
"os"
"path"
)
// Return all the directories
func loadIds(root string) ([]string, error) {
dirs, err := ioutil.ReadDir(root)
if err != nil {
return nil, err
}
out := []string{}
for _, d := range dirs {
if !d.IsDir() {
out = append(out, d.Name())
}
}
return out, nil
}
// Read the layers file for the current id and return all the
// layers represented by new lines in the file
//
// If there are no lines in the file then the id has no parent
// and an empty slice is returned.
func getParentIds(root, id string) ([]string, error) {
f, err := os.Open(path.Join(root, "layers", id))
if err != nil {
return nil, err
}
defer f.Close()
out := []string{}
s := bufio.NewScanner(f)
for s.Scan() {
if t := s.Text(); t != "" {
out = append(out, s.Text())
}
}
return out, s.Err()
}
|
