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flavor_manifest.go
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/
flavor_manifest.go
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package support
import (
"compress/gzip"
"github.com/mandelsoft/goutils/errors"
"github.com/opencontainers/go-digest"
"github.com/open-component-model/ocm/pkg/common/accessobj"
"github.com/open-component-model/ocm/pkg/contexts/oci/artdesc"
"github.com/open-component-model/ocm/pkg/contexts/oci/cpi"
)
type ManifestAccess struct {
master cpi.ArtifactAccess
artifactBase
}
var _ cpi.ManifestAccess = (*ManifestAccess)(nil)
type manifestMapper struct {
accessobj.State
}
var _ accessobj.State = (*manifestMapper)(nil)
func (m *manifestMapper) GetState() interface{} {
i, _ := m.State.GetState().(*artdesc.Artifact).Manifest()
return i
}
func (m *manifestMapper) GetOriginalState() interface{} {
i, _ := m.State.GetOriginalState().(*artdesc.Artifact).Manifest()
return i
}
func NewManifestForArtifact(master cpi.ArtifactAccess, a *ArtifactAccessImpl) *ManifestAccess {
m := &ManifestAccess{
master: master,
artifactBase: newArtifactBase(a.container, &manifestMapper{a.state}),
}
return m
}
func (m *ManifestAccess) AddBlob(access cpi.BlobAccess) error {
return m.master.AddBlob(access)
}
func (m *ManifestAccess) Manifest() (*artdesc.Manifest, error) {
return m.GetDescriptor(), nil
}
func (m *ManifestAccess) Index() (*artdesc.Index, error) {
return nil, errors.ErrInvalid()
}
func (m *ManifestAccess) Artifact() *artdesc.Artifact {
a := artdesc.New()
_ = a.SetManifest(m.GetDescriptor())
return a
}
func (m *ManifestAccess) GetDescriptor() *artdesc.Manifest {
return m.state.GetState().(*artdesc.Manifest)
}
func (m *ManifestAccess) GetBlobDescriptor(digest digest.Digest) *cpi.Descriptor {
d := m.GetDescriptor().GetBlobDescriptor(digest)
/*
if d != nil {
d = m.container.GetBlobDescriptor(digest)
}
*/
return d
}
func (m *ManifestAccess) GetConfigBlob() (cpi.BlobAccess, error) {
if m.GetDescriptor().Config.Digest == "" {
return nil, nil
}
return m.master.GetBlob(m.GetDescriptor().Config.Digest)
}
func (m *ManifestAccess) GetBlob(digest digest.Digest) (cpi.BlobAccess, error) {
return m.master.GetBlob(digest)
}
func (m *ManifestAccess) SetConfigBlob(blob cpi.BlobAccess, d *artdesc.Descriptor) error {
if d == nil {
d = artdesc.DefaultBlobDescriptor(blob)
}
err := m.master.AddBlob(blob)
if err != nil {
return err
}
m.GetDescriptor().Config = *d
return nil
}
func (m *ManifestAccess) AddLayer(blob cpi.BlobAccess, d *artdesc.Descriptor) (int, error) {
m.lock.Lock()
defer m.lock.Unlock()
if d == nil {
d = &artdesc.Descriptor{}
}
d.Digest = blob.Digest()
d.Size = blob.Size()
if d.MediaType == "" {
d.MediaType = blob.MimeType()
if d.MediaType == "" {
d.MediaType = artdesc.MediaTypeImageLayer
r, err := blob.Reader()
if err != nil {
return -1, err
}
defer r.Close()
zr, err := gzip.NewReader(r)
if err == nil {
err = zr.Close()
if err == nil {
d.MediaType = artdesc.MediaTypeImageLayerGzip
}
}
}
}
err := m.container.AddBlob(blob)
if err != nil {
return -1, err
}
manifest := m.GetDescriptor()
manifest.Layers = append(manifest.Layers, *d)
return len(manifest.Layers) - 1, nil
}