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// Copyright 2022 Google LLC All Rights Reserved.
//
// 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 remote
import (
"io"
"sync"
"sync/atomic"
v1 "github.com/google/go-containerregistry/pkg/v1"
)
type progress struct {
sync.Mutex
updates chan<- v1.Update
lastUpdate *v1.Update
}
func (p *progress) total(delta int64) {
atomic.AddInt64(&p.lastUpdate.Total, delta)
}
func (p *progress) complete(delta int64) {
p.Lock()
defer p.Unlock()
p.updates <- v1.Update{
Total: p.lastUpdate.Total,
Complete: atomic.AddInt64(&p.lastUpdate.Complete, delta),
}
}
func (p *progress) err(err error) error {
if err != nil && p.updates != nil {
p.updates <- v1.Update{Error: err}
}
return err
}
type progressReader struct {
rc io.ReadCloser
count *int64 // number of bytes this reader has read, to support resetting on retry.
progress *progress
}
func (r *progressReader) Read(b []byte) (int, error) {
n, err := r.rc.Read(b)
if err != nil {
return n, err
}
atomic.AddInt64(r.count, int64(n))
// TODO: warn/debug log if sending takes too long, or if sending is blocked while context is canceled.
r.progress.complete(int64(n))
return n, nil
}
func (r *progressReader) Close() error { return r.rc.Close() }
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