mirror of
https://github.com/octoleo/syncthing.git
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51 lines
1.2 KiB
Go
51 lines
1.2 KiB
Go
// Copyright (C) 2015 The Syncthing Authors.
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//
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// This Source Code Form is subject to the terms of the Mozilla Public
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// License, v. 2.0. If a copy of the MPL was not distributed with this file,
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// You can obtain one at http://mozilla.org/MPL/2.0/.
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package model
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import (
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"crypto/md5"
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"fmt"
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"path/filepath"
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"runtime"
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"strings"
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)
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type tempNamer struct {
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prefix string
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}
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var defTempNamer tempNamer
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// Real filesystems usually handle 255 bytes. encfs has varying and
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// confusing file name limits. We take a safe way out and switch to hashing
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// quite early.
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const maxFilenameLength = 160 - len(".syncthing.") - len(".tmp")
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func init() {
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if runtime.GOOS == "windows" {
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defTempNamer = tempNamer{"~syncthing~"}
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} else {
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defTempNamer = tempNamer{".syncthing."}
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}
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}
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func (t tempNamer) IsTemporary(name string) bool {
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return strings.HasPrefix(filepath.Base(name), t.prefix)
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}
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func (t tempNamer) TempName(name string) string {
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tdir := filepath.Dir(name)
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tbase := filepath.Base(name)
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if len(tbase) > maxFilenameLength {
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hash := md5.New()
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hash.Write([]byte(name))
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tbase = fmt.Sprintf("%x", hash.Sum(nil))
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}
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tname := fmt.Sprintf("%s%s.tmp", t.prefix, tbase)
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return filepath.Join(tdir, tname)
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}
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