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retag.go
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retag.go
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// Copyright Project Harbor Authors
//
// 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 utils
import (
"fmt"
"github.com/goharbor/harbor/src/common/models"
"github.com/goharbor/harbor/src/common/utils/log"
"github.com/goharbor/harbor/src/common/utils/registry"
"github.com/docker/distribution/manifest/schema1"
"github.com/docker/distribution/manifest/schema2"
)
// Retag tags an image to another
func Retag(srcImage, destImage *models.Image) error {
isSameRepo := getRepoName(srcImage) == getRepoName(destImage)
srcClient, err := NewRepositoryClientForUI("harbor-ui", getRepoName(srcImage))
if err != nil {
return err
}
destClient := srcClient
if !isSameRepo {
destClient, err = NewRepositoryClientForUI("harbor-ui", getRepoName(destImage))
if err != nil {
return err
}
}
_, exist, err := srcClient.ManifestExist(srcImage.Tag)
if err != nil {
log.Errorf("check existence of manifest '%s:%s' error: %v", srcClient.Name, srcImage.Tag, err)
return err
}
if !exist {
log.Errorf("source image %s:%s not found", srcClient.Name, srcImage.Tag)
return fmt.Errorf("image %s:%s not found", srcClient.Name, srcImage.Tag)
}
accepted := []string{schema1.MediaTypeManifest, schema2.MediaTypeManifest}
digest, mediaType, payload, err := srcClient.PullManifest(srcImage.Tag, accepted)
if err != nil {
return err
}
manifest, _, err := registry.UnMarshal(mediaType, payload)
if err != nil {
return err
}
destDigest, exist, err := destClient.ManifestExist(destImage.Tag)
if err != nil {
log.Errorf("check existence of manifest '%s:%s' error: %v", destClient.Name, destImage.Tag, err)
return err
}
if exist && destDigest == digest {
log.Infof("manifest of '%s:%s' already exist", destClient.Name, destImage.Tag)
return nil
}
if !isSameRepo {
for _, descriptor := range manifest.References() {
err := destClient.MountBlob(descriptor.Digest.String(), srcClient.Name)
if err != nil {
log.Errorf("mount blob '%s' error: %v", descriptor.Digest.String(), err)
return err
}
}
}
if _, err = destClient.PushManifest(destImage.Tag, mediaType, payload); err != nil {
log.Errorf("push manifest '%s:%s' error: %v", destClient.Name, destImage.Tag, err)
return err
}
return nil
}
func getRepoName(image *models.Image) string {
return fmt.Sprintf("%s/%s", image.Project, image.Repo)
}