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typehandler.go
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/
typehandler.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 artifacthdlr
import (
"fmt"
"os"
"github.com/open-component-model/ocm/v2/cmds/ocm/pkg/output"
"github.com/open-component-model/ocm/v2/cmds/ocm/pkg/tree"
"github.com/open-component-model/ocm/v2/cmds/ocm/pkg/utils"
"github.com/open-component-model/ocm/v2/pkg/common"
"github.com/open-component-model/ocm/v2/pkg/contexts/clictx"
"github.com/open-component-model/ocm/v2/pkg/contexts/oci"
"github.com/open-component-model/ocm/v2/pkg/contexts/oci/artdesc"
"github.com/open-component-model/ocm/v2/pkg/errors"
)
func Elem(e interface{}) oci.ArtifactAccess {
return e.(*Object).Artifact
}
////////////////////////////////////////////////////////////////////////////////
type Object struct {
History common.History
Key common.NameVersion
Spec oci.RefSpec
AttachKind string
Namespace oci.NamespaceAccess
Artifact oci.ArtifactAccess
}
var (
_ common.HistoryElement = (*Object)(nil)
_ tree.Object = (*Object)(nil)
_ tree.Typed = (*Object)(nil)
)
func (o *Object) GetHistory() common.History {
return o.History
}
func (o *Object) GetKey() common.NameVersion {
return o.Key
}
func (o *Object) GetKind() string {
return o.AttachKind
}
func (o *Object) IsNode() *common.NameVersion {
blob, _ := o.Artifact.Blob()
nv := common.NewNameVersion("", blob.Digest().String())
return &nv
}
func (o *Object) AsManifest() interface{} {
var digest string
b, err := o.Artifact.Blob()
if err == nil {
digest = b.Digest().String()
} else {
digest = err.Error()
}
return &Manifest{
Spec: o.Spec,
Digest: digest,
Manifest: o.Artifact.GetDescriptor(),
}
}
func (o *Object) String() string {
blob, _ := o.Artifact.Blob()
dig := blob.Digest()
tag := "-"
if o.Spec.Tag != nil {
tag = *o.Spec.Tag
}
return fmt.Sprintf("%s [%s]: %s", dig, tag, o.History)
}
type Manifest struct {
Spec oci.RefSpec
Digest string
Manifest *artdesc.Artifact
}
////////////////////////////////////////////////////////////////////////////////
func Key(a oci.ArtifactAccess) common.NameVersion {
blob, _ := a.Blob()
return common.NewNameVersion("", blob.Digest().String())
}
type TypeHandler struct {
octx clictx.OCI
session oci.Session
repobase oci.Repository
}
func NewTypeHandler(octx clictx.OCI, session oci.Session, repobase oci.Repository) utils.TypeHandler {
return &TypeHandler{
octx: octx,
session: session,
repobase: repobase,
}
}
func (h *TypeHandler) Close() error {
return h.session.Close()
}
func (h *TypeHandler) All() ([]output.Object, error) {
return h.all(h.repobase)
}
func (h *TypeHandler) all(repo oci.Repository) ([]output.Object, error) {
if repo == nil {
return nil, nil
}
lister := repo.NamespaceLister()
if lister == nil {
return nil, nil
}
list, err := lister.GetNamespaces("", true)
if err != nil {
return nil, err
}
var result []output.Object
for _, l := range list {
part, err := h.get(repo, utils.StringSpec(l))
if err != nil {
fmt.Fprintf(os.Stderr, "Warning: %s\n", err)
}
result = append(result, part...)
}
output.Print(result, "all")
return result, nil
}
func (h *TypeHandler) Get(elemspec utils.ElemSpec) ([]output.Object, error) {
result, err := h.get(h.repobase, elemspec)
output.Print(result, "get %s", elemspec)
return result, err
}
func (h *TypeHandler) get(repo oci.Repository, elemspec utils.ElemSpec) ([]output.Object, error) {
var namespace oci.NamespaceAccess
var result []output.Object
var err error
name := elemspec.String()
spec := oci.RefSpec{}
if repo == nil {
evaluated, err := h.session.EvaluateRef(h.octx.Context(), name)
if err != nil {
return nil, errors.Wrapf(err, "repository %q", name)
}
if evaluated.Namespace == nil {
return h.all(evaluated.Repository)
}
spec = evaluated.Ref
namespace = evaluated.Namespace
if evaluated.Artifact != nil {
obj := &Object{
Key: Key(evaluated.Artifact),
Spec: spec,
Namespace: namespace,
Artifact: evaluated.Artifact,
}
result = append(result, obj)
return result, nil
}
} else {
art := oci.ArtSpec{Repository: ""}
if name != "" {
art, err = oci.ParseArt(name)
if err != nil {
return nil, errors.Wrapf(err, "artifact reference %q", name)
}
}
namespace, err = h.session.LookupNamespace(repo, art.Repository)
if err != nil {
return nil, errors.Wrapf(err, "reference %q", name)
}
spec.UniformRepositorySpec = *repo.GetSpecification().UniformRepositorySpec()
spec.Repository = art.Repository
spec.Tag = art.Tag
spec.Digest = art.Digest
}
if spec.IsVersion() {
a, err := namespace.GetArtifact(spec.Version())
if err != nil {
return nil, err
}
h.session.AddCloser(a)
obj := &Object{
Key: Key(a),
Spec: spec,
Namespace: namespace,
Artifact: a,
}
result = append(result, obj)
} else {
tags, err := namespace.ListTags()
if err != nil {
return nil, err
}
for _, tag := range tags {
a, err := namespace.GetArtifact(tag)
if err != nil {
return nil, err
}
h.session.AddCloser(a)
t := tag
s := spec
s.Tag = &t
result = append(result, &Object{
Key: Key(a),
Spec: s,
Namespace: namespace,
Artifact: a,
})
}
}
return result, nil
}