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76 lines
1.9 KiB
Go
76 lines
1.9 KiB
Go
/*
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Copyright 2022 The Flux authors
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package oci
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import (
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"bytes"
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"context"
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"fmt"
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"sort"
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"strings"
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"github.com/google/go-containerregistry/pkg/crane"
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gcrv1 "github.com/google/go-containerregistry/pkg/v1"
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)
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// List fetches the tags and their manifests for a given OCI repository.
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func List(ctx context.Context, url string) ([]Metadata, error) {
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metas := make([]Metadata, 0)
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tags, err := crane.ListTags(url, craneOptions(ctx)...)
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if err != nil {
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return nil, fmt.Errorf("listing tags failed: %w", err)
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}
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sort.Slice(tags, func(i, j int) bool { return tags[i] > tags[j] })
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for _, tag := range tags {
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// exclude cosign signatures
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if strings.HasSuffix(tag, ".sig") {
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continue
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}
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meta := Metadata{
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URL: fmt.Sprintf("%s:%s", url, tag),
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}
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manifestJSON, err := crane.Manifest(meta.URL, craneOptions(ctx)...)
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if err != nil {
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return nil, fmt.Errorf("fetching manifest failed: %w", err)
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}
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manifest, err := gcrv1.ParseManifest(bytes.NewReader(manifestJSON))
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if err != nil {
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return nil, fmt.Errorf("parsing manifest failed: %w", err)
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}
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if m, err := MetadataFromAnnotations(manifest.Annotations); err == nil {
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meta.Revision = m.Revision
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meta.Source = m.Source
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}
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digest, err := crane.Digest(meta.URL, craneOptions(ctx)...)
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if err != nil {
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return nil, fmt.Errorf("fetching digest failed: %w", err)
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}
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meta.Digest = digest
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metas = append(metas, meta)
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}
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return metas, nil
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}
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