mirror of
https://github.com/moby/moby.git
synced 2022-11-09 12:21:53 -05:00
93 lines
2.6 KiB
Go
93 lines
2.6 KiB
Go
// Copyright 2015 The etcd 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 fileutil
|
|
|
|
import (
|
|
"os"
|
|
"path/filepath"
|
|
"sort"
|
|
"strings"
|
|
"time"
|
|
|
|
"go.uber.org/zap"
|
|
)
|
|
|
|
func PurgeFile(lg *zap.Logger, dirname string, suffix string, max uint, interval time.Duration, stop <-chan struct{}) <-chan error {
|
|
return purgeFile(lg, dirname, suffix, max, interval, stop, nil, nil)
|
|
}
|
|
|
|
func PurgeFileWithDoneNotify(lg *zap.Logger, dirname string, suffix string, max uint, interval time.Duration, stop <-chan struct{}) (<-chan struct{}, <-chan error) {
|
|
doneC := make(chan struct{})
|
|
errC := purgeFile(lg, dirname, suffix, max, interval, stop, nil, doneC)
|
|
return doneC, errC
|
|
}
|
|
|
|
// purgeFile is the internal implementation for PurgeFile which can post purged files to purgec if non-nil.
|
|
// if donec is non-nil, the function closes it to notify its exit.
|
|
func purgeFile(lg *zap.Logger, dirname string, suffix string, max uint, interval time.Duration, stop <-chan struct{}, purgec chan<- string, donec chan<- struct{}) <-chan error {
|
|
if lg == nil {
|
|
lg = zap.NewNop()
|
|
}
|
|
errC := make(chan error, 1)
|
|
go func() {
|
|
if donec != nil {
|
|
defer close(donec)
|
|
}
|
|
for {
|
|
fnames, err := ReadDir(dirname)
|
|
if err != nil {
|
|
errC <- err
|
|
return
|
|
}
|
|
newfnames := make([]string, 0)
|
|
for _, fname := range fnames {
|
|
if strings.HasSuffix(fname, suffix) {
|
|
newfnames = append(newfnames, fname)
|
|
}
|
|
}
|
|
sort.Strings(newfnames)
|
|
fnames = newfnames
|
|
for len(newfnames) > int(max) {
|
|
f := filepath.Join(dirname, newfnames[0])
|
|
l, err := TryLockFile(f, os.O_WRONLY, PrivateFileMode)
|
|
if err != nil {
|
|
break
|
|
}
|
|
if err = os.Remove(f); err != nil {
|
|
errC <- err
|
|
return
|
|
}
|
|
if err = l.Close(); err != nil {
|
|
lg.Warn("failed to unlock/close", zap.String("path", l.Name()), zap.Error(err))
|
|
errC <- err
|
|
return
|
|
}
|
|
lg.Info("purged", zap.String("path", f))
|
|
newfnames = newfnames[1:]
|
|
}
|
|
if purgec != nil {
|
|
for i := 0; i < len(fnames)-len(newfnames); i++ {
|
|
purgec <- fnames[i]
|
|
}
|
|
}
|
|
select {
|
|
case <-time.After(interval):
|
|
case <-stop:
|
|
return
|
|
}
|
|
}
|
|
}()
|
|
return errC
|
|
}
|