/
merge.go
191 lines (169 loc) · 4.6 KB
/
merge.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
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
// Copyright © 2021 Alibaba Group Holding Ltd.
//
// 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 image
import (
"context"
"fmt"
"github.com/alibaba/sealer/pkg/image/reference"
"github.com/alibaba/sealer/utils"
"github.com/alibaba/sealer/common"
"github.com/opencontainers/go-digest"
"golang.org/x/sync/errgroup"
"sigs.k8s.io/yaml"
"github.com/alibaba/sealer/pkg/image/store"
v1 "github.com/alibaba/sealer/types/api/v1"
)
func save(imageName string, image *v1.Image) error {
var (
imageBytes []byte
imageStore store.ImageStore
err error
)
named, err := reference.ParseToNamed(imageName)
if err != nil {
return err
}
image.Name = named.CompleteName()
imageStore, err = store.NewDefaultImageStore()
if err != nil {
return err
}
imageBytes, err = yaml.Marshal(image)
if err != nil {
return err
}
imageID := digest.FromBytes(imageBytes).Hex()
image.Spec.ID = imageID
err = setClusterFile(named.CompleteName(), image)
if err != nil {
return err
}
return imageStore.Save(*image)
}
func Merge(imageName string, images []string, platform *v1.Platform) error {
if imageName == "" {
return fmt.Errorf("target image name should not be nil")
}
var (
err error
newIma *v1.Image
imageStore store.ImageStore
)
imageStore, err = store.NewDefaultImageStore()
if err != nil {
return err
}
d := DefaultImageService{imageStore: imageStore}
eg, _ := errgroup.WithContext(context.Background())
for _, ima := range images {
im := ima
plats := []*v1.Platform{platform}
eg.Go(func() error {
err = d.PullIfNotExist(im, plats)
if err != nil {
return err
}
return nil
})
}
if err := eg.Wait(); err != nil {
return err
}
for i, v := range images {
img, err := d.GetImageByName(v, platform)
if err != nil {
return err
}
if i == 0 {
newIma = img
continue
} else {
newIma, err = merge(newIma, img)
if err != nil {
return err
}
}
}
return save(imageName, newIma)
}
func merge(base, ima *v1.Image) (*v1.Image, error) {
if base == nil || ima == nil {
return nil, fmt.Errorf(" merge base or new can not be nil")
}
// merge image platform
if base.Spec.Platform.OS != ima.Spec.Platform.OS ||
base.Spec.Platform.Architecture != ima.Spec.Platform.Architecture ||
base.Spec.Platform.Variant != ima.Spec.Platform.Variant {
return nil, fmt.Errorf("can not merge different platform")
}
var (
isApp = base.Spec.ImageConfig.ImageType == common.AppImage &&
ima.Spec.ImageConfig.ImageType == common.AppImage
)
// merge image type;only if two image is application image we can determine this new image is application image.
if isApp {
base.Spec.ImageConfig.ImageType = common.AppImage
}
// merge image config arg and remove duplicate value
base.Spec.ImageConfig.Args = mergeImageArg(base.Spec.ImageConfig.Args, ima.Spec.ImageConfig.Args, isApp)
// merge image config cmd and remove duplicate value
base.Spec.ImageConfig.Cmd = mergeImageCmd(base.Spec.ImageConfig.Cmd, ima.Spec.ImageConfig.Cmd, isApp)
// merge image layer
res := append(base.Spec.Layers, ima.Spec.Layers...)
base.Spec.Layers = removeDuplicateLayers(res)
return base, nil
}
func mergeImageCmd(base, ima v1.ImageCmd, isApp bool) v1.ImageCmd {
current := utils.MergeSlice(base.Current, ima.Current)
if isApp {
return v1.ImageCmd{
Current: current,
}
}
return v1.ImageCmd{
Current: current,
Parent: utils.MergeSlice(base.Parent, ima.Parent),
}
}
func mergeImageArg(base, ima v1.ImageArg, isApp bool) v1.ImageArg {
for k, v := range ima.Current {
base.Current[k] = v
}
if isApp {
return v1.ImageArg{
Current: base.Current,
}
}
for k, v := range ima.Parent {
base.Parent[k] = v
}
return v1.ImageArg{
Parent: base.Parent,
Current: base.Current,
}
}
func removeDuplicateLayers(list []v1.Layer) []v1.Layer {
var result []v1.Layer
flagMap := map[string]struct{}{}
for _, v := range list {
// if id is not nil,remove duplicate id,this covers run and copy instruction.
if v.ID.String() != "" {
if _, ok := flagMap[v.ID.String()]; !ok {
flagMap[v.ID.String()] = struct{}{}
result = append(result, v)
}
}
}
return result
}