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// Copyright (C) 2017 The Syncthing Authors.
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
// You can obtain one at https://mozilla.org/MPL/2.0/.
package versioner
import (
"path/filepath"
"sort"
"github.com/syncthing/syncthing/lib/fs"
)
type emptyDirTracker map[string]struct{}
func (t emptyDirTracker) addDir(path string) {
if path == "." {
return
}
t[path] = struct{}{}
}
// Remove all dirs from the path to the file
func (t emptyDirTracker) addFile(path string) {
dir := filepath.Dir(path)
for dir != "." {
delete(t, dir)
dir = filepath.Dir(dir)
}
}
func (t emptyDirTracker) emptyDirs() []string {
empty := []string{}
for dir := range t {
empty = append(empty, dir)
}
sort.Sort(sort.Reverse(sort.StringSlice(empty)))
return empty
}
func (t emptyDirTracker) deleteEmptyDirs(fs fs.Filesystem) {
for _, path := range t.emptyDirs() {
l.Debugln("Cleaner: deleting empty directory", path)
err := fs.Remove(path)
if err != nil {
l.Warnln("Versioner: can't remove directory", path, err)
}
}
}
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