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Fixes #23
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Original file line number | Diff line number | Diff line change |
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/* | ||
* Copyright (c) 2019-Present Pivotal Software, Inc. 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. | ||
*/ | ||
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package ggcr | ||
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import ( | ||
"fmt" | ||
v1 "github.com/google/go-containerregistry/pkg/v1" | ||
"github.com/pivotal/image-relocation/pkg/image" | ||
"github.com/pivotal/image-relocation/pkg/registry" | ||
) | ||
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type manifestWriter func(i v1.Image, n image.Name) error | ||
type indexWriter func(i v1.ImageIndex, n image.Name) error | ||
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type client struct { | ||
readRemoteImage func(n image.Name) (registry.Image, error) | ||
writeRemoteImage manifestWriter | ||
writeRemoteIndex indexWriter | ||
} | ||
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// NewRegistryClient returns a new Client. | ||
func NewRegistryClient() registry.Client { | ||
return &client{ | ||
readRemoteImage: readRemoteImage(writeRemoteImage, writeRemoteIndex), | ||
writeRemoteImage: writeRemoteImage, | ||
writeRemoteIndex: writeRemoteIndex, | ||
} | ||
} | ||
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func (r *client) Digest(n image.Name) (image.Digest, error) { | ||
img, err := r.readRemoteImage(n) | ||
if err != nil { | ||
return image.EmptyDigest, err | ||
} | ||
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hash, err := img.Digest() | ||
if err != nil { | ||
return image.EmptyDigest, err | ||
} | ||
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return image.NewDigest(hash.String()) | ||
} | ||
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func (r *client) Copy(source image.Name, target image.Name) (image.Digest, int64, error) { | ||
img, err := r.readRemoteImage(source) | ||
if err != nil { | ||
return image.EmptyDigest, 0, fmt.Errorf("failed to read image %v: %v", source, err) | ||
} | ||
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sourceDigest, err := img.Digest() | ||
if err != nil { | ||
return image.EmptyDigest, 0, fmt.Errorf("failed to read digest of image %v: %v", source, err) | ||
} | ||
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targetDigest, s, err := img.Write(target) | ||
if err != nil { | ||
return image.EmptyDigest, 0 , fmt.Errorf("failed to write image %v: %v", target, err) | ||
} | ||
if sourceDigest != targetDigest { | ||
return image.EmptyDigest, 0, fmt.Errorf("failed to preserve digest of image %v: source digest %v, target digest %v", source, sourceDigest, targetDigest) | ||
} | ||
return targetDigest, s, err | ||
} |
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