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purge.go
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/
purge.go
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package fileutil
import (
"log"
"os"
"path"
"sort"
"strings"
"time"
)
func PurgeFile(dirname string, suffix string, max uint, interval time.Duration, stop <-chan struct{}) <-chan error {
errC := make(chan error, 1)
go func() {
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)
for len(newfnames) > int(max) {
f := path.Join(dirname, newfnames[0])
err := os.Remove(f)
if err != nil {
errC <- err
return
}
log.Printf("filePurge: successfully remvoed file %s", f)
newfnames = newfnames[1:]
}
select {
case <-time.After(interval):
case <-stop:
return
}
}
}()
return errC
}