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Signed-off-by: Avi Deitcher <[email protected]>
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// Copyright 2018 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. | ||
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package partial | ||
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import ( | ||
"fmt" | ||
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v1 "github.com/google/go-containerregistry/pkg/v1" | ||
"github.com/google/go-containerregistry/pkg/v1/match" | ||
) | ||
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// FindManifests given a v1.ImageIndex, find the manifests that fit the matcher | ||
func FindManifests(index v1.ImageIndex, matcher match.Matcher) ([]v1.Descriptor, error) { | ||
// get the actual manifest list | ||
indexManifest, err := index.IndexManifest() | ||
if err != nil { | ||
return nil, fmt.Errorf("unable to get raw index: %v", err) | ||
} | ||
manifests := []v1.Descriptor{} | ||
// try to get the root of our image | ||
for _, manifest := range indexManifest.Manifests { | ||
if matcher(manifest) { | ||
manifests = append(manifests, manifest) | ||
} | ||
} | ||
return manifests, nil | ||
} | ||
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// FindImages given a v1.ImageIndex, find the images that fit the matcher. If a Descriptor | ||
// matches the provider Matcher, but the referenced item is not an Image, ignores it. | ||
// Only returns those that match the Matcher and are images. | ||
func FindImages(index v1.ImageIndex, matcher match.Matcher) ([]v1.Image, error) { | ||
matches := []v1.Image{} | ||
manifests, err := FindManifests(index, matcher) | ||
if err != nil { | ||
return nil, err | ||
} | ||
for _, desc := range manifests { | ||
// if it is not an image, ignore it | ||
if !desc.MediaType.IsImage() { | ||
continue | ||
} | ||
img, err := index.Image(desc.Digest) | ||
if err != nil { | ||
return nil, err | ||
} | ||
matches = append(matches, img) | ||
} | ||
return matches, nil | ||
} | ||
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// FindIndexes given a v1.ImageIndex, find the indexes that fit the matcher. If a Descriptor | ||
// matches the provider Matcher, but the referenced item is not an Index, ignores it. | ||
// Only returns those that match the Matcher and are indexes. | ||
func FindIndexes(index v1.ImageIndex, matcher match.Matcher) ([]v1.ImageIndex, error) { | ||
matches := []v1.ImageIndex{} | ||
manifests, err := FindManifests(index, matcher) | ||
if err != nil { | ||
return nil, err | ||
} | ||
for _, desc := range manifests { | ||
if !desc.MediaType.IsIndex() { | ||
continue | ||
} | ||
// if it is not an index, ignore it | ||
idx, err := index.ImageIndex(desc.Digest) | ||
if err != nil { | ||
return nil, err | ||
} | ||
matches = append(matches, idx) | ||
} | ||
return matches, nil | ||
} |
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