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
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
|
package parse
import (
"fmt"
"path/filepath"
"strings"
"github.com/containers/common/pkg/parse"
"github.com/containers/storage/pkg/fileutils"
specs "github.com/opencontainers/runtime-spec/specs-go"
)
// ValidateVolumeMountHostDir validates the host path of buildah --volume
func ValidateVolumeMountHostDir(hostDir string) error {
if !filepath.IsAbs(hostDir) {
return fmt.Errorf("invalid host path, must be an absolute path %q", hostDir)
}
if err := fileutils.Exists(hostDir); err != nil {
return err
}
return nil
}
// RevertEscapedColon converts "\:" to ":"
func RevertEscapedColon(source string) string {
return strings.ReplaceAll(source, "\\:", ":")
}
// SplitStringWithColonEscape splits string into slice by colon. Backslash-escaped colon (i.e. "\:") will not be regarded as separator
func SplitStringWithColonEscape(str string) []string {
result := make([]string, 0, 3)
sb := &strings.Builder{}
for idx, r := range str {
if r == ':' {
// the colon is backslash-escaped
if idx-1 > 0 && str[idx-1] == '\\' {
sb.WriteRune(r)
} else {
// os.Stat will fail if path contains escaped colon
result = append(result, RevertEscapedColon(sb.String()))
sb.Reset()
}
} else {
sb.WriteRune(r)
}
}
if sb.Len() > 0 {
result = append(result, RevertEscapedColon(sb.String()))
}
return result
}
// Volume parses the input of --volume
func Volume(volume string) (specs.Mount, error) {
mount := specs.Mount{}
arr := SplitStringWithColonEscape(volume)
if len(arr) < 2 {
return mount, fmt.Errorf("incorrect volume format %q, should be host-dir:ctr-dir[:option]", volume)
}
if err := ValidateVolumeMountHostDir(arr[0]); err != nil {
return mount, err
}
if err := parse.ValidateVolumeCtrDir(arr[1]); err != nil {
return mount, err
}
mountOptions := ""
if len(arr) > 2 {
mountOptions = arr[2]
if _, err := parse.ValidateVolumeOpts(strings.Split(arr[2], ",")); err != nil {
return mount, err
}
}
mountOpts := strings.Split(mountOptions, ",")
mount.Source = arr[0]
mount.Destination = arr[1]
mount.Type = "rbind"
mount.Options = mountOpts
return mount, nil
}
|
