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118 lines
2.7 KiB
118 lines
2.7 KiB
// Copyright 2023 Google LLC All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package remote
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import (
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"bytes"
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"context"
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"encoding/json"
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"github.com/google/go-containerregistry/pkg/name"
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v1 "github.com/google/go-containerregistry/pkg/v1"
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"github.com/google/go-containerregistry/pkg/v1/partial"
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"github.com/google/go-containerregistry/pkg/v1/types"
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)
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type schema1 struct {
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ref name.Reference
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ctx context.Context
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fetcher fetcher
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manifest []byte
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mediaType types.MediaType
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descriptor *v1.Descriptor
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}
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func (s *schema1) Layers() ([]v1.Layer, error) {
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m := schema1Manifest{}
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if err := json.NewDecoder(bytes.NewReader(s.manifest)).Decode(&m); err != nil {
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return nil, err
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}
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layers := []v1.Layer{}
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for i := len(m.FSLayers) - 1; i >= 0; i-- {
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fsl := m.FSLayers[i]
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h, err := v1.NewHash(fsl.BlobSum)
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if err != nil {
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return nil, err
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}
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l, err := s.LayerByDigest(h)
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if err != nil {
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return nil, err
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}
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layers = append(layers, l)
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}
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return layers, nil
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}
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func (s *schema1) MediaType() (types.MediaType, error) {
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return s.mediaType, nil
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}
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func (s *schema1) Size() (int64, error) {
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return s.descriptor.Size, nil
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}
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func (s *schema1) ConfigName() (v1.Hash, error) {
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return partial.ConfigName(s)
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}
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func (s *schema1) ConfigFile() (*v1.ConfigFile, error) {
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return nil, newErrSchema1(s.mediaType)
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}
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func (s *schema1) RawConfigFile() ([]byte, error) {
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return []byte("{}"), nil
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}
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func (s *schema1) Digest() (v1.Hash, error) {
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return s.descriptor.Digest, nil
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}
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func (s *schema1) Manifest() (*v1.Manifest, error) {
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return nil, newErrSchema1(s.mediaType)
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}
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func (s *schema1) RawManifest() ([]byte, error) {
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return s.manifest, nil
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}
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func (s *schema1) LayerByDigest(h v1.Hash) (v1.Layer, error) {
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l, err := partial.CompressedToLayer(&remoteLayer{
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fetcher: s.fetcher,
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ctx: s.ctx,
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digest: h,
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})
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if err != nil {
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return nil, err
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}
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return &MountableLayer{
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Layer: l,
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Reference: s.ref.Context().Digest(h.String()),
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}, nil
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}
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func (s *schema1) LayerByDiffID(v1.Hash) (v1.Layer, error) {
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return nil, newErrSchema1(s.mediaType)
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}
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type fslayer struct {
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BlobSum string `json:"blobSum"`
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}
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type schema1Manifest struct {
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FSLayers []fslayer `json:"fsLayers"`
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}
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