distribution/testutil/manifests.go

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package testutil
import (
"fmt"
"github.com/distribution/distribution/v3"
"github.com/distribution/distribution/v3/internal/dcontext"
"github.com/distribution/distribution/v3/manifest/manifestlist"
"github.com/distribution/distribution/v3/manifest/schema2"
"github.com/opencontainers/go-digest"
)
// MakeManifestList constructs a manifest list out of a list of manifest digests
func MakeManifestList(blobstatter distribution.BlobStatter, manifestDigests []digest.Digest) (*manifestlist.DeserializedManifestList, error) {
ctx := dcontext.Background()
manifestDescriptors := make([]manifestlist.ManifestDescriptor, 0, len(manifestDigests))
for _, manifestDigest := range manifestDigests {
descriptor, err := blobstatter.Stat(ctx, manifestDigest)
if err != nil {
return nil, err
}
platformSpec := manifestlist.PlatformSpec{
Architecture: "atari2600",
OS: "CP/M",
Variant: "ternary",
Features: []string{"VLIW", "superscalaroutoforderdevnull"},
}
manifestDescriptor := manifestlist.ManifestDescriptor{
Descriptor: descriptor,
Platform: platformSpec,
}
manifestDescriptors = append(manifestDescriptors, manifestDescriptor)
}
return manifestlist.FromDescriptors(manifestDescriptors)
}
// MakeSchema2Manifest constructs a schema 2 manifest from a given list of digests and returns
// the digest of the manifest
func MakeSchema2Manifest(repository distribution.Repository, digests []digest.Digest) (distribution.Manifest, error) {
ctx := dcontext.Background()
blobStore := repository.Blobs(ctx)
var configJSON []byte
d, err := blobStore.Put(ctx, schema2.MediaTypeImageConfig, configJSON)
if err != nil {
return nil, fmt.Errorf("unexpected error storing content in blobstore: %v", err)
}
builder := schema2.NewManifestBuilder(d, configJSON)
for _, digest := range digests {
if err := builder.AppendReference(distribution.Descriptor{Digest: digest}); err != nil {
return nil, fmt.Errorf("unexpected error building manifest: %v", err)
}
}
mfst, err := builder.Build(ctx)
if err != nil {
return nil, fmt.Errorf("unexpected error generating manifest: %v", err)
}
return mfst, nil
}