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/*
Copyright The containerd Authors.
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 img
import (
"context"
"fmt"
"github.com/containerd/containerd/content"
"github.com/containerd/containerd/errdefs"
"github.com/containerd/containerd/images"
"github.com/containerd/containerd/platforms"
encocispec "github.com/containers/ocicrypt/spec"
ocispec "github.com/opencontainers/image-spec/specs-go/v1"
)
// GetImageLayerDescriptors gets the image layer Descriptors of an image; the array contains
// a list of Descriptors belonging to one platform followed by lists of other platforms
func GetImageLayerDescriptors(ctx context.Context, cs content.Store, desc ocispec.Descriptor) ([]ocispec.Descriptor, error) {
var lis []ocispec.Descriptor
ds := platforms.DefaultSpec()
platform := &ds
switch desc.MediaType {
case images.MediaTypeDockerSchema2ManifestList, ocispec.MediaTypeImageIndex,
images.MediaTypeDockerSchema2Manifest, ocispec.MediaTypeImageManifest:
children, err := images.Children(ctx, cs, desc)
if err != nil {
if errdefs.IsNotFound(err) {
return []ocispec.Descriptor{}, nil
}
return []ocispec.Descriptor{}, err
}
if desc.Platform != nil {
platform = desc.Platform
}
for _, child := range children {
var tmp []ocispec.Descriptor
switch child.MediaType {
case images.MediaTypeDockerSchema2LayerGzip, images.MediaTypeDockerSchema2Layer,
ocispec.MediaTypeImageLayerGzip, ocispec.MediaTypeImageLayerZstd, ocispec.MediaTypeImageLayer,
encocispec.MediaTypeLayerGzipEnc, encocispec.MediaTypeLayerEnc,
encocispec.MediaTypeLayerZstdEnc:
tdesc := child
tdesc.Platform = platform
tmp = append(tmp, tdesc)
default:
tmp, err = GetImageLayerDescriptors(ctx, cs, child)
}
if err != nil {
return []ocispec.Descriptor{}, err
}
lis = append(lis, tmp...)
}
case images.MediaTypeDockerSchema2Config, ocispec.MediaTypeImageConfig:
default:
return nil, fmt.Errorf("unhandled media type %s: %w", desc.MediaType, errdefs.ErrInvalidArgument)
}
return lis, nil
}
// IntToInt32Array converts an array of int's to int32's
func IntToInt32Array(in []int) []int32 {
var ret []int32
for _, v := range in {
ret = append(ret, int32(v))
}
return ret
}
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