1 // Copyright 2020 Google LLC All Rights Reserved. 2 // 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 package remote 16 17 import ( 18 "github.com/google/go-containerregistry/pkg/name" 19 "golang.org/x/sync/errgroup" 20 ) 21 22 // MultiWrite writes the given Images or ImageIndexes to the given refs, as 23 // efficiently as possible, by deduping shared layer blobs while uploading them 24 // in parallel. 25 func MultiWrite(todo map[name.Reference]Taggable, options ...Option) (rerr error) { 26 o, err := makeOptions(options...) 27 if err != nil { 28 return err 29 } 30 if o.progress != nil { 31 defer func() { o.progress.Close(rerr) }() 32 } 33 p := newPusher(o) 34 35 g, ctx := errgroup.WithContext(o.context) 36 g.SetLimit(o.jobs) 37 38 for ref, t := range todo { 39 ref, t := ref, t 40 g.Go(func() error { 41 return p.Push(ctx, ref, t) 42 }) 43 } 44 45 return g.Wait() 46 } 47