/
delete_all_objects.go
75 lines (64 loc) · 1.8 KB
/
delete_all_objects.go
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// Copyright 2015 Google Inc. 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 gcsutil
import (
"github.com/jacobsa/gcloud/gcs"
"github.com/jacobsa/syncutil"
"golang.org/x/net/context"
)
// Delete all objects from the supplied bucket. Results are undefined if the
// bucket is being concurrently updated.
func DeleteAllObjects(
ctx context.Context,
bucket gcs.Bucket) error {
bundle := syncutil.NewBundle(ctx)
// List all of the objects in the bucket.
objects := make(chan *gcs.Object, 100)
bundle.Add(func(ctx context.Context) error {
defer close(objects)
return ListPrefix(ctx, bucket, "", objects)
})
// Strip everything but the name.
objectNames := make(chan string, 10e3)
bundle.Add(func(ctx context.Context) (err error) {
defer close(objectNames)
for o := range objects {
select {
case <-ctx.Done():
err = ctx.Err()
return
case objectNames <- o.Name:
}
}
return
})
// Delete the objects in parallel.
const parallelism = 64
for i := 0; i < parallelism; i++ {
bundle.Add(func(ctx context.Context) error {
for objectName := range objectNames {
err := bucket.DeleteObject(
ctx,
&gcs.DeleteObjectRequest{
Name: objectName,
})
if err != nil {
return err
}
}
return nil
})
}
return bundle.Join()
}