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
|
// Copyright 2019 Google LLC All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// Package legacy provides methods for interacting with legacy image formats.
package legacy
import (
"bytes"
"encoding/json"
"github.com/google/go-containerregistry/pkg/name"
"github.com/google/go-containerregistry/pkg/v1/remote"
)
// CopySchema1 allows `[g]crane cp` to work with old images without adding
// full support for schema 1 images to this package.
func CopySchema1(desc *remote.Descriptor, srcRef, dstRef name.Reference, opts ...remote.Option) error {
m := schema1{}
if err := json.NewDecoder(bytes.NewReader(desc.Manifest)).Decode(&m); err != nil {
return err
}
for _, layer := range m.FSLayers {
src := srcRef.Context().Digest(layer.BlobSum)
dst := dstRef.Context().Digest(layer.BlobSum)
blob, err := remote.Layer(src, opts...)
if err != nil {
return err
}
if err := remote.WriteLayer(dst.Context(), blob, opts...); err != nil {
return err
}
}
return remote.Put(dstRef, desc, opts...)
}
type fslayer struct {
BlobSum string `json:"blobSum"`
}
type schema1 struct {
FSLayers []fslayer `json:"fsLayers"`
}
|
