129 lines
2.9 KiB
Go
129 lines
2.9 KiB
Go
// Copyright (C) 2014 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 http://mozilla.org/MPL/2.0/.
|
|
|
|
package versioner
|
|
|
|
import (
|
|
"os"
|
|
"path/filepath"
|
|
"strconv"
|
|
|
|
"github.com/syncthing/syncthing/internal/osutil"
|
|
)
|
|
|
|
func init() {
|
|
// Register the constructor for this type of versioner with the name "simple"
|
|
Factories["simple"] = NewSimple
|
|
}
|
|
|
|
type Simple struct {
|
|
keep int
|
|
folderPath string
|
|
}
|
|
|
|
func NewSimple(folderID, folderPath string, params map[string]string) Versioner {
|
|
keep, err := strconv.Atoi(params["keep"])
|
|
if err != nil {
|
|
keep = 5 // A reasonable default
|
|
}
|
|
|
|
s := Simple{
|
|
keep: keep,
|
|
folderPath: folderPath,
|
|
}
|
|
|
|
if debug {
|
|
l.Debugf("instantiated %#v", s)
|
|
}
|
|
return s
|
|
}
|
|
|
|
// Archive moves the named file away to a version archive. If this function
|
|
// returns nil, the named file does not exist any more (has been archived).
|
|
func (v Simple) Archive(filePath string) error {
|
|
fileInfo, err := osutil.Lstat(filePath)
|
|
if os.IsNotExist(err) {
|
|
if debug {
|
|
l.Debugln("not archiving nonexistent file", filePath)
|
|
}
|
|
return nil
|
|
} else if err != nil {
|
|
return err
|
|
}
|
|
|
|
versionsDir := filepath.Join(v.folderPath, ".stversions")
|
|
_, err = os.Stat(versionsDir)
|
|
if err != nil {
|
|
if os.IsNotExist(err) {
|
|
if debug {
|
|
l.Debugln("creating versions dir", versionsDir)
|
|
}
|
|
os.MkdirAll(versionsDir, 0755)
|
|
osutil.HideFile(versionsDir)
|
|
} else {
|
|
return err
|
|
}
|
|
}
|
|
|
|
if debug {
|
|
l.Debugln("archiving", filePath)
|
|
}
|
|
|
|
file := filepath.Base(filePath)
|
|
inFolderPath, err := filepath.Rel(v.folderPath, filepath.Dir(filePath))
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
dir := filepath.Join(versionsDir, inFolderPath)
|
|
err = os.MkdirAll(dir, 0755)
|
|
if err != nil && !os.IsExist(err) {
|
|
return err
|
|
}
|
|
|
|
ver := taggedFilename(file, fileInfo.ModTime().Format(TimeFormat))
|
|
dst := filepath.Join(dir, ver)
|
|
if debug {
|
|
l.Debugln("moving to", dst)
|
|
}
|
|
err = osutil.Rename(filePath, dst)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
// Glob according to the new file~timestamp.ext pattern.
|
|
newVersions, err := osutil.Glob(filepath.Join(dir, taggedFilename(file, TimeGlob)))
|
|
if err != nil {
|
|
l.Warnln("globbing:", err)
|
|
return nil
|
|
}
|
|
|
|
// Also according to the old file.ext~timestamp pattern.
|
|
oldVersions, err := osutil.Glob(filepath.Join(dir, file+"~"+TimeGlob))
|
|
if err != nil {
|
|
l.Warnln("globbing:", err)
|
|
return nil
|
|
}
|
|
|
|
// Use all the found filenames. "~" sorts after "." so all old pattern
|
|
// files will be deleted before any new, which is as it should be.
|
|
versions := uniqueSortedStrings(append(oldVersions, newVersions...))
|
|
|
|
if len(versions) > v.keep {
|
|
for _, toRemove := range versions[:len(versions)-v.keep] {
|
|
if debug {
|
|
l.Debugln("cleaning out", toRemove)
|
|
}
|
|
err = os.Remove(toRemove)
|
|
if err != nil {
|
|
l.Warnln("removing old version:", err)
|
|
}
|
|
}
|
|
}
|
|
|
|
return nil
|
|
}
|