1 /* 2 Copyright The ORAS Authors. 3 Licensed under the Apache License, Version 2.0 (the "License"); 4 you may not use this file except in compliance with the License. 5 You may obtain a copy of the License at 6 7 http://www.apache.org/licenses/LICENSE-2.0 8 9 Unless required by applicable law or agreed to in writing, software 10 distributed under the License is distributed on an "AS IS" BASIS, 11 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 See the License for the specific language governing permissions and 13 limitations under the License. 14 */ 15 16 package content 17 18 import ( 19 "context" 20 21 ctrcontent "github.com/containerd/containerd/content" 22 "github.com/containerd/containerd/remotes" 23 ocispec "github.com/opencontainers/image-spec/specs-go/v1" 24 ) 25 26 // MultiWriterIngester an ingester that can provide a single writer or multiple writers for a single 27 // descriptor. Useful when the target of a descriptor can have multiple items within it, e.g. a layer 28 // that is a tar file with multiple files, each of which should go to a different stream, some of which 29 // should not be handled at all. 30 type MultiWriterIngester interface { 31 ctrcontent.Ingester 32 Writers(ctx context.Context, opts ...ctrcontent.WriterOpt) (func(string) (ctrcontent.Writer, error), error) 33 } 34 35 // MultiWriterPusher a pusher that can provide a single writer or multiple writers for a single 36 // descriptor. Useful when the target of a descriptor can have multiple items within it, e.g. a layer 37 // that is a tar file with multiple files, each of which should go to a different stream, some of which 38 // should not be handled at all. 39 type MultiWriterPusher interface { 40 remotes.Pusher 41 Pushers(ctx context.Context, desc ocispec.Descriptor) (func(string) (ctrcontent.Writer, error), error) 42 } 43