mirror of
https://github.com/siyuan-note/siyuan.git
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109 lines
2.9 KiB
Go
109 lines
2.9 KiB
Go
// SiYuan - Build Your Eternal Digital Garden
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// Copyright (c) 2020-present, b3log.org
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <https://www.gnu.org/licenses/>.
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package filesys
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import (
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"os"
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"path/filepath"
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"sync"
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"github.com/88250/gulu"
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"github.com/siyuan-note/filelock"
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"github.com/siyuan-note/siyuan/kernel/util"
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)
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type DataConf struct {
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Updated int64 `json:"updated"` // 最近一次数据更新时间
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SyncVer int64 `json:"syncVer"` // 同步版本号
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Device string `json:"device"` // 设备 ID
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}
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var incWorkspaceDataVerLock = sync.Mutex{}
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func IncWorkspaceDataVer(inc bool, systemID string) {
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incWorkspaceDataVerLock.Lock()
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defer incWorkspaceDataVerLock.Unlock()
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confPath := filepath.Join(util.DataDir, ".siyuan")
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os.MkdirAll(confPath, 0755)
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confPath = filepath.Join(confPath, "conf.json")
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var data []byte
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var err error
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now := util.CurrentTimeMillis()
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conf := &DataConf{Updated: now, Device: systemID}
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if !gulu.File.IsExist(confPath) {
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data, _ = gulu.JSON.MarshalIndentJSON(conf, "", " ")
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if err = filelock.LockFileWrite(confPath, data); nil != err {
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util.LogErrorf("save data conf [%s] failed: %s", confPath, err)
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}
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t := util.Millisecond2Time(now)
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if err = os.Chtimes(confPath, t, t); nil != err {
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util.LogErrorf("change file [%s] mod time failed: %s", confPath, err)
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}
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return
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}
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data, err = filelock.LockFileRead(confPath)
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if nil != err {
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data, err = recoverFrom(confPath)
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if nil != err {
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return
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}
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}
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if err = gulu.JSON.UnmarshalJSON(data, conf); nil != err {
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data, err = recoverFrom(confPath)
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if nil != err {
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return
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}
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if err = gulu.JSON.UnmarshalJSON(data, conf); nil != err {
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util.LogErrorf("parse data conf [%s] failed: %s", confPath, err)
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}
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}
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conf.Updated = now
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conf.Device = systemID
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if inc {
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conf.SyncVer++
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}
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data, _ = gulu.JSON.MarshalIndentJSON(conf, "", " ")
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if err = filelock.LockFileWrite(confPath, data); nil != err {
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util.LogErrorf("save data conf [%s] failed: %s", confPath, err)
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return
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}
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}
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func recoverFrom(confPath string) (data []byte, err error) {
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// 尝试从临时文件恢复
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tmp := util.LatestTmpFile(confPath)
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if "" == tmp {
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return
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}
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data, err = filelock.NoLockFileRead(tmp)
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if nil != err {
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util.LogErrorf("read temp data conf [%s] failed: %s", tmp, err)
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return
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}
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util.LogInfof("recovered file [%s] from [%s]", confPath, tmp)
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os.RemoveAll(tmp)
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return
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}
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