Golang FileInfo.Version方法代码示例

// Test that updating a file removes it's old blocks from the blockmap
func TestCopierCleanup(t *testing.T) {
	iterFn := func(folder, file string, index int32) bool {
		return true
	}

	db, _ := leveldb.Open(storage.NewMemStorage(), nil)
	m := NewModel(defaultConfig, protocol.LocalDeviceID, "device", "syncthing", "dev", db)
	m.AddFolder(defaultFolderConfig)

	// Create a file
	file := protocol.FileInfo{
		Name:     "test",
		Flags:    0,
		Modified: 0,
		Blocks:   []protocol.BlockInfo{blocks[0]},
	}

	// Add file to index
	m.updateLocals("default", []protocol.FileInfo{file})

	if !m.finder.Iterate(folders, blocks[0].Hash, iterFn) {
		t.Error("Expected block not found")
	}

	file.Blocks = []protocol.BlockInfo{blocks[1]}
	file.Version = file.Version.Update(protocol.LocalDeviceID.Short())
	// Update index (removing old blocks)
	m.updateLocals("default", []protocol.FileInfo{file})

	if m.finder.Iterate(folders, blocks[0].Hash, iterFn) {
		t.Error("Unexpected block found")
	}

	if !m.finder.Iterate(folders, blocks[1].Hash, iterFn) {
		t.Error("Expected block not found")
	}

	file.Blocks = []protocol.BlockInfo{blocks[0]}
	file.Version = file.Version.Update(protocol.LocalDeviceID.Short())
	// Update index (removing old blocks)
	m.updateLocals("default", []protocol.FileInfo{file})

	if !m.finder.Iterate(folders, blocks[0].Hash, iterFn) {
		t.Error("Unexpected block found")
	}

	if m.finder.Iterate(folders, blocks[1].Hash, iterFn) {
		t.Error("Expected block not found")
	}
}

// shortcutFile sets file mode and modification time, when that's the only
// thing that has changed.
func (p *rwFolder) shortcutFile(file protocol.FileInfo) error {
	realName := filepath.Join(p.dir, file.Name)
	if !p.ignorePermissions(file) {
		if err := os.Chmod(realName, os.FileMode(file.Flags&0777)); err != nil {
			l.Infof("Puller (folder %q, file %q): shortcut: chmod: %v", p.folder, file.Name, err)
			p.newError(file.Name, err)
			return err
		}
	}

	t := time.Unix(file.Modified, 0)
	if err := os.Chtimes(realName, t, t); err != nil {
		// Try using virtual mtimes
		info, err := os.Stat(realName)
		if err != nil {
			l.Infof("Puller (folder %q, file %q): shortcut: unable to stat file: %v", p.folder, file.Name, err)
			p.newError(file.Name, err)
			return err
		}

		p.virtualMtimeRepo.UpdateMtime(file.Name, info.ModTime(), t)
	}

	// This may have been a conflict. We should merge the version vectors so
	// that our clock doesn't move backwards.
	if cur, ok := p.model.CurrentFolderFile(p.folder, file.Name); ok {
		file.Version = file.Version.Merge(cur.Version)
	}

	return nil
}

// deleteFile attempts to delete the given file
func (f *rwFolder) deleteFile(file protocol.FileInfo) {
	// Used in the defer closure below, updated by the function body. Take
	// care not declare another err.
	var err error

	events.Default.Log(events.ItemStarted, map[string]string{
		"folder": f.folderID,
		"item":   file.Name,
		"type":   "file",
		"action": "delete",
	})

	defer func() {
		events.Default.Log(events.ItemFinished, map[string]interface{}{
			"folder": f.folderID,
			"item":   file.Name,
			"error":  events.Error(err),
			"type":   "file",
			"action": "delete",
		})
	}()

	realName, err := rootedJoinedPath(f.dir, file.Name)
	if err != nil {
		f.newError(file.Name, err)
		return
	}

	cur, ok := f.model.CurrentFolderFile(f.folderID, file.Name)
	if ok && f.inConflict(cur.Version, file.Version) {
		// There is a conflict here. Move the file to a conflict copy instead
		// of deleting. Also merge with the version vector we had, to indicate
		// we have resolved the conflict.
		file.Version = file.Version.Merge(cur.Version)
		err = osutil.InWritableDir(f.moveForConflict, realName)
	} else if f.versioner != nil {
		err = osutil.InWritableDir(f.versioner.Archive, realName)
	} else {
		err = osutil.InWritableDir(os.Remove, realName)
	}

	if err == nil || os.IsNotExist(err) {
		// It was removed or it doesn't exist to start with
		f.dbUpdates <- dbUpdateJob{file, dbUpdateDeleteFile}
	} else if _, serr := f.mtimeFS.Lstat(realName); serr != nil && !os.IsPermission(serr) {
		// We get an error just looking at the file, and it's not a permission
		// problem. Lets assume the error is in fact some variant of "file
		// does not exist" (possibly expressed as some parent being a file and
		// not a directory etc) and that the delete is handled.
		f.dbUpdates <- dbUpdateJob{file, dbUpdateDeleteFile}
	} else {
		l.Infof("Puller (folder %q, file %q): delete: %v", f.folderID, file.Name, err)
		f.newError(file.Name, err)
	}
}

// shortcutFile sets file mode and modification time, when that's the only
// thing that has changed.
func (f *rwFolder) shortcutFile(file protocol.FileInfo) error {
	realName := filepath.Join(f.dir, file.Name)
	if !f.ignorePermissions(file) {
		if err := os.Chmod(realName, os.FileMode(file.Permissions&0777)); err != nil {
			l.Infof("Puller (folder %q, file %q): shortcut: chmod: %v", f.folderID, file.Name, err)
			f.newError(file.Name, err)
			return err
		}
	}

	f.mtimeFS.Chtimes(realName, file.ModTime(), file.ModTime()) // never fails

	// This may have been a conflict. We should merge the version vectors so
	// that our clock doesn't move backwards.
	if cur, ok := f.model.CurrentFolderFile(f.folderID, file.Name); ok {
		file.Version = file.Version.Merge(cur.Version)
	}

	return nil
}