| /* |
| 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 containerd |
| |
| import ( |
| "context" |
| "io" |
| |
| "github.com/containerd/containerd/images/oci" |
| |
| ocispec "github.com/opencontainers/image-spec/specs-go/v1" |
| "github.com/pkg/errors" |
| ) |
| |
| // Export exports an image to a Tar stream. |
| // OCI format is used by default. |
| // It is up to caller to put "org.opencontainers.image.ref.name" annotation to desc. |
| // TODO(AkihiroSuda): support exporting multiple descriptors at once to a single archive stream. |
| func (c *Client) Export(ctx context.Context, desc ocispec.Descriptor, opts ...oci.V1ExporterOpt) (io.ReadCloser, error) { |
| |
| exporter, err := oci.ResolveV1ExportOpt(opts...) |
| if err != nil { |
| return nil, err |
| } |
| |
| pr, pw := io.Pipe() |
| go func() { |
| pw.CloseWithError(errors.Wrap(exporter.Export(ctx, c.ContentStore(), desc, pw), "export failed")) |
| }() |
| return pr, nil |
| } |