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
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
|
// 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 partial_test
import (
"io"
"os"
"testing"
"github.com/google/go-containerregistry/internal/compare"
legacy "github.com/google/go-containerregistry/pkg/legacy/tarball"
"github.com/google/go-containerregistry/pkg/name"
v1 "github.com/google/go-containerregistry/pkg/v1"
"github.com/google/go-containerregistry/pkg/v1/mutate"
"github.com/google/go-containerregistry/pkg/v1/partial"
"github.com/google/go-containerregistry/pkg/v1/random"
"github.com/google/go-containerregistry/pkg/v1/tarball"
"github.com/google/go-containerregistry/pkg/v1/types"
"github.com/google/go-containerregistry/pkg/v1/validate"
)
// foreignLayer implements both partial.Describable and partial.UncompressedLayer.
type foreignLayer struct {
wrapped v1.Layer
}
func (l *foreignLayer) Digest() (v1.Hash, error) {
return l.wrapped.Digest()
}
func (l *foreignLayer) Size() (int64, error) {
return l.wrapped.Size()
}
func (l *foreignLayer) MediaType() (types.MediaType, error) {
return types.DockerForeignLayer, nil
}
func (l *foreignLayer) Uncompressed() (io.ReadCloser, error) {
return l.wrapped.Uncompressed()
}
func (l *foreignLayer) DiffID() (v1.Hash, error) {
return l.wrapped.DiffID()
}
func (l *foreignLayer) Descriptor() (*v1.Descriptor, error) {
r, err := l.wrapped.Compressed()
if err != nil {
return nil, err
}
h, sz, err := v1.SHA256(r)
if err != nil {
return nil, err
}
return &v1.Descriptor{
Digest: h,
Size: sz,
MediaType: types.DockerForeignLayer,
URLs: []string{"http://example.com"},
}, nil
}
func (l *foreignLayer) UncompressedSize() (int64, error) {
return partial.UncompressedSize(l.wrapped)
}
func TestUncompressedLayer(t *testing.T) {
randLayer, err := random.Layer(1024, types.DockerForeignLayer)
if err != nil {
t.Fatal(err)
}
l := &foreignLayer{randLayer}
desc, err := partial.Descriptor(l)
if err != nil {
t.Fatal(err)
}
if want, got := desc.URLs[0], "http://example.com"; want != got {
t.Errorf("URLs[0] = %s != %s", got, want)
}
layer, err := partial.UncompressedToLayer(l)
if err != nil {
t.Fatal(err)
}
if err := validate.Layer(layer); err != nil {
t.Errorf("validate.Layer: %v", err)
}
if _, err := partial.UncompressedSize(layer); err != nil {
t.Errorf("partial.UncompressedSize: %v", err)
}
}
// legacy/tarball.Write + tarball.Image leverages a lot of uncompressed partials.
//
// This is cribbed from pkg/legacy/tarball just to get intra-package coverage.
func TestLegacyWrite(t *testing.T) {
// Make a tempfile for tarball writes.
fp, err := os.CreateTemp("", "")
if err != nil {
t.Fatalf("Error creating temp file.")
}
t.Log(fp.Name())
defer fp.Close()
defer os.Remove(fp.Name())
// Make a random image + layer with Descriptor().
randImage, err := random.Image(256, 2)
if err != nil {
t.Fatalf("Error creating random image: %v", err)
}
randLayer, err := random.Layer(1024, types.DockerForeignLayer)
if err != nil {
t.Fatal(err)
}
l, err := partial.UncompressedToLayer(&foreignLayer{randLayer})
if err != nil {
t.Fatal(err)
}
img, err := mutate.AppendLayers(randImage, l)
if err != nil {
t.Fatal(err)
}
tag, err := name.NewTag("gcr.io/foo/bar:latest", name.StrictValidation)
if err != nil {
t.Fatalf("Error creating test tag: %v", err)
}
o, err := os.Create(fp.Name())
if err != nil {
t.Fatalf("Error creating %q to write image tarball: %v", fp.Name(), err)
}
defer o.Close()
if err := legacy.Write(tag, img, o); err != nil {
t.Fatalf("Unexpected error writing tarball: %v", err)
}
// Make sure the image is valid and can be loaded.
// Load it both by nil and by its name.
for _, it := range []*name.Tag{nil, &tag} {
tarImage, err := tarball.ImageFromPath(fp.Name(), it)
if err != nil {
t.Fatalf("Unexpected error reading tarball: %v", err)
}
if err := validate.Image(tarImage); err != nil {
t.Errorf("validate.Image: %v", err)
}
if err := compare.Images(img, tarImage); err != nil {
t.Errorf("compare.Images: %v", err)
}
}
// Try loading a different tag, it should error.
fakeTag, err := name.NewTag("gcr.io/notthistag:latest", name.StrictValidation)
if err != nil {
t.Fatalf("Error generating tag: %v", err)
}
if _, err := tarball.ImageFromPath(fp.Name(), &fakeTag); err == nil {
t.Errorf("Expected error loading tag %v from image", fakeTag)
}
}
type uncompressedImage struct {
img v1.Image
}
func (i *uncompressedImage) RawConfigFile() ([]byte, error) {
return i.img.RawConfigFile()
}
func (i *uncompressedImage) MediaType() (types.MediaType, error) {
return i.img.MediaType()
}
func (i *uncompressedImage) LayerByDiffID(h v1.Hash) (partial.UncompressedLayer, error) {
return i.img.LayerByDiffID(h)
}
func (i *uncompressedImage) Descriptor() (*v1.Descriptor, error) {
return partial.Descriptor(i.img)
}
func TestUncompressed(t *testing.T) {
rnd, err := random.Image(1024, 1)
if err != nil {
t.Fatal(err)
}
core := &uncompressedImage{rnd}
img, err := partial.UncompressedToImage(core)
if err != nil {
t.Fatal(err)
}
if err := validate.Image(img); err != nil {
t.Fatalf("validate.Image: %v", err)
}
if _, err := partial.Descriptor(img); err != nil {
t.Fatalf("partial.Descriptor: %v", err)
}
layers, err := img.Layers()
if err != nil {
t.Fatal(err)
}
layer, err := partial.UncompressedToLayer(&fastpathLayer{layers[0]})
if err != nil {
t.Fatal(err)
}
ok, err := partial.Exists(layer)
if err != nil {
t.Fatal(err)
}
if got, want := ok, true; got != want {
t.Errorf("Exists() = %t != %t", got, want)
}
}
|
