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namespace.go
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namespace.go
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// SPDX-FileCopyrightText: 2022 SAP SE or an SAP affiliate company and Open Component Model contributors.
//
// SPDX-License-Identifier: Apache-2.0
package ocireg
import (
"context"
"fmt"
"github.com/containerd/containerd/errdefs"
"github.com/opencontainers/go-digest"
"github.com/open-component-model/ocm/pkg/blobaccess"
"github.com/open-component-model/ocm/pkg/common"
"github.com/open-component-model/ocm/pkg/common/accessio"
"github.com/open-component-model/ocm/pkg/contexts/oci/actions/oci-repository-prepare"
"github.com/open-component-model/ocm/pkg/contexts/oci/artdesc"
"github.com/open-component-model/ocm/pkg/contexts/oci/cpi"
"github.com/open-component-model/ocm/pkg/contexts/oci/cpi/support"
"github.com/open-component-model/ocm/pkg/docker/resolve"
"github.com/open-component-model/ocm/pkg/errors"
"github.com/open-component-model/ocm/pkg/logging"
)
type NamespaceContainer struct {
impl support.NamespaceAccessImpl
repo *RepositoryImpl
resolver resolve.Resolver
lister resolve.Lister
fetcher resolve.Fetcher
pusher resolve.Pusher
blobs *BlobContainers
checked bool
}
var _ support.NamespaceContainer = (*NamespaceContainer)(nil)
func NewNamespace(repo *RepositoryImpl, name string) (cpi.NamespaceAccess, error) {
ref := repo.GetRef(name, "")
resolver, err := repo.getResolver(name)
if err != nil {
return nil, err
}
fetcher, err := resolver.Fetcher(context.Background(), ref)
if err != nil {
return nil, err
}
pusher, err := resolver.Pusher(context.Background(), ref)
if err != nil {
return nil, err
}
lister, err := resolver.Lister(context.Background(), ref)
if err != nil {
return nil, err
}
c := &NamespaceContainer{
repo: repo,
resolver: resolver,
lister: lister,
fetcher: fetcher,
pusher: pusher,
blobs: NewBlobContainers(repo.GetContext(), fetcher, pusher),
}
return support.NewNamespaceAccess(name, c, repo)
}
func (n *NamespaceContainer) Close() error {
return n.blobs.Release()
}
func (n *NamespaceContainer) SetImplementation(impl support.NamespaceAccessImpl) {
n.impl = impl
}
func (n *NamespaceContainer) getPusher(vers string) (resolve.Pusher, error) {
err := n.assureCreated()
if err != nil {
return nil, err
}
ref := n.repo.GetRef(n.impl.GetNamespace(), vers)
resolver := n.resolver
n.repo.GetContext().Logger().Trace("get pusher", "ref", ref)
if ok, _ := artdesc.IsDigest(vers); !ok {
var err error
resolver, err = n.repo.getResolver(n.impl.GetNamespace())
if err != nil {
return nil, fmt.Errorf("unable get resolver: %w", err)
}
}
return resolver.Pusher(dummyContext, ref)
}
func (n *NamespaceContainer) push(vers string, blob cpi.BlobAccess) error {
p, err := n.getPusher(vers)
if err != nil {
return fmt.Errorf("unable to get pusher: %w", err)
}
n.repo.GetContext().Logger().Trace("pushing", "version", vers)
return push(dummyContext, p, blob)
}
func (n *NamespaceContainer) IsReadOnly() bool {
return n.repo.IsReadOnly()
}
func (n *NamespaceContainer) GetBlobDescriptor(digest digest.Digest) *cpi.Descriptor {
return nil
}
func (n *NamespaceContainer) GetBlobData(digest digest.Digest) (int64, cpi.DataAccess, error) {
n.repo.GetContext().Logger().Debug("getting blob", "digest", digest)
blob, err := n.blobs.Get("")
if err != nil {
return -1, nil, fmt.Errorf("failed to retrieve blob data: %w", err)
}
size, acc, err := blob.GetBlobData(digest)
n.repo.GetContext().Logger().Debug("getting blob done", "digest", digest, "size", size, "error", logging.ErrorMessage(err))
return size, acc, err
}
func (n *NamespaceContainer) AddBlob(blob cpi.BlobAccess) error {
log := n.repo.GetContext().Logger()
log.Debug("adding blob", "digest", blob.Digest())
blobData, err := n.blobs.Get("")
if err != nil {
return fmt.Errorf("failed to retrieve blob data: %w", err)
}
err = n.assureCreated()
if err != nil {
return err
}
if _, _, err := blobData.AddBlob(blob); err != nil {
log.Debug("adding blob failed", "digest", blob.Digest(), "error", err.Error())
return fmt.Errorf("unable to add blob (OCI repository %s): %w", n.impl.GetNamespace(), err)
}
log.Debug("adding blob done", "digest", blob.Digest())
return nil
}
func (n *NamespaceContainer) ListTags() ([]string, error) {
return n.lister.List(dummyContext)
}
func (n *NamespaceContainer) GetArtifact(i support.NamespaceAccessImpl, vers string) (cpi.ArtifactAccess, error) {
ref := n.repo.GetRef(n.impl.GetNamespace(), vers)
n.repo.GetContext().Logger().Debug("get artifact", "ref", ref)
_, desc, err := n.resolver.Resolve(context.Background(), ref)
n.repo.GetContext().Logger().Debug("done", "digest", desc.Digest, "size", desc.Size, "mimetype", desc.MediaType, "error", logging.ErrorMessage(err))
if err != nil {
if errdefs.IsNotFound(err) {
return nil, errors.ErrNotFound(cpi.KIND_OCIARTIFACT, ref, n.impl.GetNamespace())
}
return nil, err
}
blobData, err := n.blobs.Get(desc.MediaType)
if err != nil {
return nil, fmt.Errorf("failed to retrieve blob data, blob data was empty: %w", err)
}
_, acc, err := blobData.GetBlobData(desc.Digest)
if err != nil {
return nil, err
}
return support.NewArtifactForBlob(i, blobaccess.ForDataAccess(desc.Digest, desc.Size, desc.MediaType, acc))
}
func (n *NamespaceContainer) HasArtifact(vers string) (bool, error) {
ref := n.repo.GetRef(n.impl.GetNamespace(), vers)
n.repo.GetContext().Logger().Debug("check artifact", "ref", ref)
_, desc, err := n.resolver.Resolve(context.Background(), ref)
n.repo.GetContext().Logger().Debug("done", "digest", desc.Digest, "size", desc.Size, "mimetype", desc.MediaType, "error", logging.ErrorMessage(err))
if err != nil {
if errdefs.IsNotFound(err) {
return false, nil
}
return false, err
}
return true, nil
}
func (n *NamespaceContainer) assureCreated() error {
if n.checked {
return nil
}
var props common.Properties
if creds, err := n.repo.getCreds(n.impl.GetNamespace()); err == nil && creds != nil {
props = creds.Properties()
}
r, err := oci_repository_prepare.Execute(n.repo.GetContext().GetActions(), n.repo.info.HostPort(), n.impl.GetNamespace(), props)
n.checked = true
if err != nil {
return err
}
if r != nil {
n.repo.GetContext().Logger().Debug("prepare action executed", "message", r.Message)
}
return nil
}
func (n *NamespaceContainer) AddArtifact(artifact cpi.Artifact, tags ...string) (access blobaccess.BlobAccess, err error) {
blob, err := artifact.Blob()
if err != nil {
return nil, err
}
if n.repo.info.Legacy {
blob = artdesc.MapArtifactBlobMimeType(blob, true)
}
n.repo.GetContext().Logger().Debug("adding artifact", "digest", blob.Digest(), "mimetype", blob.MimeType())
blobData, err := n.blobs.Get(blob.MimeType())
if err != nil {
return nil, fmt.Errorf("failed to retrieve blob data: %w", err)
}
_, _, err = blobData.AddBlob(blob)
if err != nil {
return nil, err
}
if len(tags) > 0 {
for _, tag := range tags {
if err := n.push(tag, blob); err != nil {
return nil, err
}
}
}
return blob, err
}
func (n *NamespaceContainer) AddTags(digest digest.Digest, tags ...string) error {
_, desc, err := n.resolver.Resolve(context.Background(), n.repo.GetRef(n.impl.GetNamespace(), digest.String()))
if err != nil {
return fmt.Errorf("unable to resolve: %w", err)
}
acc, err := NewDataAccess(n.fetcher, desc.Digest, desc.MediaType, false)
if err != nil {
return fmt.Errorf("error creating new data access: %w", err)
}
blob := blobaccess.ForDataAccess(desc.Digest, desc.Size, desc.MediaType, acc)
for _, tag := range tags {
err := n.push(tag, blob)
if err != nil {
return fmt.Errorf("unable to push: %w", err)
}
}
return nil
}
func (n *NamespaceContainer) NewArtifact(i support.NamespaceAccessImpl, art ...cpi.Artifact) (cpi.ArtifactAccess, error) {
if n.IsReadOnly() {
return nil, accessio.ErrReadOnly
}
return support.NewArtifact(i, art...)
}