mirror of https://github.com/k3d-io/k3d
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
140 lines
3.1 KiB
140 lines
3.1 KiB
1 year ago
|
// Copyright 2018 Google LLC All Rights Reserved.
|
||
|
//
|
||
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
||
|
// you may not use this file except in compliance with the License.
|
||
|
// You may obtain a copy of the License at
|
||
|
//
|
||
|
// http://www.apache.org/licenses/LICENSE-2.0
|
||
|
//
|
||
|
// Unless required by applicable law or agreed to in writing, software
|
||
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
||
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||
|
// See the License for the specific language governing permissions and
|
||
|
// limitations under the License.
|
||
|
|
||
|
package layout
|
||
|
|
||
|
import (
|
||
|
"fmt"
|
||
|
"io"
|
||
|
"os"
|
||
|
"sync"
|
||
|
|
||
|
v1 "github.com/google/go-containerregistry/pkg/v1"
|
||
|
"github.com/google/go-containerregistry/pkg/v1/partial"
|
||
|
"github.com/google/go-containerregistry/pkg/v1/types"
|
||
|
)
|
||
|
|
||
|
type layoutImage struct {
|
||
|
path Path
|
||
|
desc v1.Descriptor
|
||
|
manifestLock sync.Mutex // Protects rawManifest
|
||
|
rawManifest []byte
|
||
|
}
|
||
|
|
||
|
var _ partial.CompressedImageCore = (*layoutImage)(nil)
|
||
|
|
||
|
// Image reads a v1.Image with digest h from the Path.
|
||
|
func (l Path) Image(h v1.Hash) (v1.Image, error) {
|
||
|
ii, err := l.ImageIndex()
|
||
|
if err != nil {
|
||
|
return nil, err
|
||
|
}
|
||
|
|
||
|
return ii.Image(h)
|
||
|
}
|
||
|
|
||
|
func (li *layoutImage) MediaType() (types.MediaType, error) {
|
||
|
return li.desc.MediaType, nil
|
||
|
}
|
||
|
|
||
|
// Implements WithManifest for partial.Blobset.
|
||
|
func (li *layoutImage) Manifest() (*v1.Manifest, error) {
|
||
|
return partial.Manifest(li)
|
||
|
}
|
||
|
|
||
|
func (li *layoutImage) RawManifest() ([]byte, error) {
|
||
|
li.manifestLock.Lock()
|
||
|
defer li.manifestLock.Unlock()
|
||
|
if li.rawManifest != nil {
|
||
|
return li.rawManifest, nil
|
||
|
}
|
||
|
|
||
|
b, err := li.path.Bytes(li.desc.Digest)
|
||
|
if err != nil {
|
||
|
return nil, err
|
||
|
}
|
||
|
|
||
|
li.rawManifest = b
|
||
|
return li.rawManifest, nil
|
||
|
}
|
||
|
|
||
|
func (li *layoutImage) RawConfigFile() ([]byte, error) {
|
||
|
manifest, err := li.Manifest()
|
||
|
if err != nil {
|
||
|
return nil, err
|
||
|
}
|
||
|
|
||
|
return li.path.Bytes(manifest.Config.Digest)
|
||
|
}
|
||
|
|
||
|
func (li *layoutImage) LayerByDigest(h v1.Hash) (partial.CompressedLayer, error) {
|
||
|
manifest, err := li.Manifest()
|
||
|
if err != nil {
|
||
|
return nil, err
|
||
|
}
|
||
|
|
||
|
if h == manifest.Config.Digest {
|
||
|
return &compressedBlob{
|
||
|
path: li.path,
|
||
|
desc: manifest.Config,
|
||
|
}, nil
|
||
|
}
|
||
|
|
||
|
for _, desc := range manifest.Layers {
|
||
|
if h == desc.Digest {
|
||
|
return &compressedBlob{
|
||
|
path: li.path,
|
||
|
desc: desc,
|
||
|
}, nil
|
||
|
}
|
||
|
}
|
||
|
|
||
|
return nil, fmt.Errorf("could not find layer in image: %s", h)
|
||
|
}
|
||
|
|
||
|
type compressedBlob struct {
|
||
|
path Path
|
||
|
desc v1.Descriptor
|
||
|
}
|
||
|
|
||
|
func (b *compressedBlob) Digest() (v1.Hash, error) {
|
||
|
return b.desc.Digest, nil
|
||
|
}
|
||
|
|
||
|
func (b *compressedBlob) Compressed() (io.ReadCloser, error) {
|
||
|
return b.path.Blob(b.desc.Digest)
|
||
|
}
|
||
|
|
||
|
func (b *compressedBlob) Size() (int64, error) {
|
||
|
return b.desc.Size, nil
|
||
|
}
|
||
|
|
||
|
func (b *compressedBlob) MediaType() (types.MediaType, error) {
|
||
|
return b.desc.MediaType, nil
|
||
|
}
|
||
|
|
||
|
// Descriptor implements partial.withDescriptor.
|
||
|
func (b *compressedBlob) Descriptor() (*v1.Descriptor, error) {
|
||
|
return &b.desc, nil
|
||
|
}
|
||
|
|
||
|
// See partial.Exists.
|
||
|
func (b *compressedBlob) Exists() (bool, error) {
|
||
|
_, err := os.Stat(b.path.blobPath(b.desc.Digest))
|
||
|
if os.IsNotExist(err) {
|
||
|
return false, nil
|
||
|
}
|
||
|
return err == nil, err
|
||
|
}
|