containerd/services/rootfs/preparer.go

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package rootfs
import (
"context"
rootfsapi "github.com/containerd/containerd/api/services/rootfs"
containerd_v1_types "github.com/containerd/containerd/api/types/descriptor"
"github.com/containerd/containerd/rootfs"
digest "github.com/opencontainers/go-digest"
ocispec "github.com/opencontainers/image-spec/specs-go/v1"
)
func NewUnpackerFromClient(client rootfsapi.RootFSClient) rootfs.Unpacker {
return remoteUnpacker{
client: client,
}
}
type remoteUnpacker struct {
client rootfsapi.RootFSClient
}
func (rp remoteUnpacker) Unpack(ctx context.Context, layers []ocispec.Descriptor) (digest.Digest, error) {
pr := rootfsapi.UnpackRequest{
Layers: make([]*containerd_v1_types.Descriptor, len(layers)),
}
for i, l := range layers {
pr.Layers[i] = &containerd_v1_types.Descriptor{
MediaType: l.MediaType,
Digest: l.Digest,
Size_: l.Size,
}
}
resp, err := rp.client.Unpack(ctx, &pr)
if err != nil {
return "", err
}
return resp.ChainID, nil
}