Skip to content
Snippets Groups Projects
Select Git revision
1 result Searching

self-hosted-configuration.md

Blame
  • list.go 1.92 KiB
    /*
    Copyright 2022 The Flux 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 oci
    
    import (
    	"bytes"
    	"context"
    	"fmt"
    	"sort"
    	"strings"
    
    	"github.com/google/go-containerregistry/pkg/crane"
    	gcrv1 "github.com/google/go-containerregistry/pkg/v1"
    )
    
    // List fetches the tags and their manifests for a given OCI repository.
    func List(ctx context.Context, url string) ([]Metadata, error) {
    	metas := make([]Metadata, 0)
    	tags, err := crane.ListTags(url, craneOptions(ctx)...)
    	if err != nil {
    		return nil, fmt.Errorf("listing tags failed: %w", err)
    	}
    
    	sort.Slice(tags, func(i, j int) bool { return tags[i] > tags[j] })
    
    	for _, tag := range tags {
    		// exclude cosign signatures
    		if strings.HasSuffix(tag, ".sig") {
    			continue
    		}
    
    		meta := Metadata{
    			URL: fmt.Sprintf("%s:%s", url, tag),
    		}
    
    		manifestJSON, err := crane.Manifest(meta.URL, craneOptions(ctx)...)
    		if err != nil {
    			return nil, fmt.Errorf("fetching manifest failed: %w", err)
    		}
    
    		manifest, err := gcrv1.ParseManifest(bytes.NewReader(manifestJSON))
    		if err != nil {
    			return nil, fmt.Errorf("parsing manifest failed: %w", err)
    		}
    
    		if m, err := MetadataFromAnnotations(manifest.Annotations); err == nil {
    			meta.Revision = m.Revision
    			meta.Source = m.Source
    		}
    
    		digest, err := crane.Digest(meta.URL, craneOptions(ctx)...)
    		if err != nil {
    			return nil, fmt.Errorf("fetching digest failed: %w", err)
    		}
    		meta.Digest = digest
    
    		metas = append(metas, meta)
    	}
    
    	return metas, nil
    }