distribution/registry/storage/walk.go
Richard e4f07c368b Automatically purge old upload files.
When the registry starts a background timer will periodically
scan the upload directories on the file system every 24 hours
and delete any files older than 1 week. An initial jitter
intends to avoid contention on the filesystem where multiple
registries with the same storage driver are started
simultaneously.
2015-04-16 10:57:34 -07:00

50 lines
1.4 KiB
Go

package storage
import (
"errors"
"fmt"
storageDriver "github.com/docker/distribution/registry/storage/driver"
)
// SkipDir is used as a return value from onFileFunc to indicate that
// the directory named in the call is to be skipped. It is not returned
// as an error by any function.
var ErrSkipDir = errors.New("skip this directory")
// WalkFn is called once per file by Walk
// If the returned error is ErrSkipDir and fileInfo refers
// to a directory, the directory will not be entered and Walk
// will continue the traversal. Otherwise Walk will return
type WalkFn func(fileInfo storageDriver.FileInfo) error
// Walk traverses a filesystem defined within driver, starting
// from the given path, calling f on each file
func Walk(driver storageDriver.StorageDriver, from string, f WalkFn) error {
children, err := driver.List(from)
if err != nil {
return err
}
for _, child := range children {
fileInfo, err := driver.Stat(child)
if err != nil {
return err
}
err = f(fileInfo)
skipDir := (err == ErrSkipDir)
if err != nil && !skipDir {
return err
}
if fileInfo.IsDir() && !skipDir {
Walk(driver, child, f)
}
}
return nil
}
// pushError formats an error type given a path and an error
// and pushes it to a slice of errors
func pushError(errors []error, path string, err error) []error {
return append(errors, fmt.Errorf("%s: %s", path, err))
}