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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 v1util | ||
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import ( | ||
"fmt" | ||
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v1 "github.com/google/go-containerregistry/pkg/v1" | ||
) | ||
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// FindManifests given a v1.ImageIndex, find the manifests that fit the matcher | ||
func FindManifests(index v1.ImageIndex, matcher ManifestMatcher) ([]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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// Copyright 2020 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 v1util | ||
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import ( | ||
v1 "github.com/google/go-containerregistry/pkg/v1" | ||
imagespec "github.com/opencontainers/image-spec/specs-go/v1" | ||
) | ||
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// ManifestMatcher function that is given a v1.Descriptor, and returns whether or | ||
// not it matches a given rule. Can match on anything it wants in the Descriptor. | ||
type ManifestMatcher func(desc v1.Descriptor) bool | ||
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// NameMatcher returns a ManifestMatcher that matches on the name tag in | ||
// github.com/opencontainers/image-spec/specs-go/v1.AnnotationRefName | ||
func NameMatcher(name string) ManifestMatcher { | ||
return AnnotationMatcher(imagespec.AnnotationRefName, name) | ||
} | ||
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// AnnotationMatcher returns a ManifestMatcher that matches based on the provided annotation | ||
func AnnotationMatcher(key, value string) ManifestMatcher { | ||
return func(desc v1.Descriptor) bool { | ||
if desc.Annotations == nil { | ||
return false | ||
} | ||
if aValue, ok := desc.Annotations[key]; ok && aValue == value { | ||
return true | ||
} | ||
return false | ||
} | ||
} | ||
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// PlatformMatcher returns a ManifestMatcher that matches on the provided platform. | ||
// Ignores any descriptors that do not have a platform. | ||
func PlatformMatcher(platform v1.Platform) ManifestMatcher { | ||
return func(desc v1.Descriptor) bool { | ||
if desc.Platform == nil { | ||
return false | ||
} | ||
return platformEqual(*desc.Platform, platform) | ||
} | ||
} | ||
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// MediaTypeMatcher returns a ManifestMatcher that matches based on one of the provided media types | ||
func MediaTypeMatcher(mediaTypes []string) ManifestMatcher { | ||
mts := map[string]bool{} | ||
for _, media := range mediaTypes { | ||
mts[media] = true | ||
} | ||
return func(desc v1.Descriptor) bool { | ||
if desc.MediaType == "" { | ||
return false | ||
} | ||
if _, ok := mts[string(desc.MediaType)]; ok { | ||
return true | ||
} | ||
return false | ||
} | ||
} | ||
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// platformEqual return if two v1.Platform are functionally equivalent. | ||
func platformEqual(a, b v1.Platform) bool { | ||
// ignoring the Platform.Features and Platform.OSFeatures for now | ||
return a.OS == b.OS && a.Architecture == b.Architecture && a.Variant == b.Variant && a.OSVersion == b.OSVersion | ||
} |