{"record":{"id":"b0d8c553ef2811b6","repo":"flipped-aurora/gin-vue-admin","slug":"s-w-b0d8c5","errorCode":null,"errorMessage":"原子替换 %s 失败: %w","messagePattern":"原子替换 (.+?) 失败: %w","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"server/service/system/auto_code_task.go","lineNumber":286,"sourceCode":"\tif err != nil {\n\t\treturn fmt.Errorf(\"创建临时文件失败: %w\", err)\n\t}\n\ttmpName := tmp.Name()\n\tdefer os.Remove(tmpName)\n\tif _, err = tmp.Write(content); err == nil {\n\t\terr = tmp.Sync()\n\t}\n\tif closeErr := tmp.Close(); err == nil {\n\t\terr = closeErr\n\t}\n\tif err != nil {\n\t\treturn fmt.Errorf(\"写入临时文件失败: %w\", err)\n\t}\n\tif err = os.Chmod(tmpName, mode.Perm()); err != nil {\n\t\treturn fmt.Errorf(\"设置临时文件权限失败: %w\", err)\n\t}\n\tif err = os.Rename(tmpName, target); err != nil {\n\t\treturn fmt.Errorf(\"原子替换 %s 失败: %w\", target, err)\n\t}\n\treturn nil\n}\n\nfunc (l autoCodeTaskLayout) classify(target string) (string, error) {\n\tif isPathWithin(l.serverRoot, target) {\n\t\treturn autoCodeTaskBackend, nil\n\t}\n\tif isPathWithin(l.webRoot, target) {\n\t\treturn autoCodeTaskFrontend, nil\n\t}\n\treturn \"\", fmt.Errorf(\"自动代码目标不在服务端或前端目录内: %s\", target)\n}\n\nfunc pathWithin(root string, elems ...string) (string, error) {\n\troot, err := filepath.Abs(root)\n\tif err != nil {\n\t\treturn \"\", err","sourceCodeStart":268,"sourceCodeEnd":304,"githubUrl":"https://github.com/flipped-aurora/gin-vue-admin/blob/3136500ef380842b0eb6c4daa87c3f8a47fcf9e0/server/service/system/auto_code_task.go#L268-L304","documentation":"The final step of replaceAutoCodeFileAtomically is os.Rename(tmpName, target), which atomically replaces the target with the fully-written temp file. If rename fails, the target is left untouched and this error wraps the syscall failure with the target path. On Unix this fails if the temp file and target end up on different devices (should not happen here) or permissions are missing on the directory; on Windows it fails if the target is open or locked.","triggerScenarios":"os.Rename(tmpName, target) errors: EACCES (no write permission on directory), EXDEV (cross-device — target is a symlink/bind-mount to another filesystem), EBUSY/sharing violation on Windows (target opened by editor, go run, vite watcher), EISDIR (target replaced by a directory).","commonSituations":"Windows dev machine with an editor or `go run` holding the generated file open; target directory made read-only; the target path is a bind mount or symlink to another filesystem; antivirus scanning lock contention.","solutions":["Close processes locking the target (editor, running dev server, watchers) and retry — most common on Windows","Ensure the server process has write+execute permission on the target directory (rename needs dir write access)","Check the target isn't a symlink or mount point crossing filesystem boundaries; replace it with a real file if so","Temporarily exclude the project from real-time antivirus scanning if it causes sharing violations"],"exampleFix":"// before: file locked by running server\ngo run main.go   # holds generated binary/source open\n// after: stop it first\nCtrl+C go run, then re-run the auto-code task","handlingStrategy":"retry","validationCode":"dir := filepath.Dir(targetPath)\nif err := unix.Access(dir, unix.W_OK|unix.X_OK); err != nil {\n    return fmt.Errorf(\"rename needs write+exec on %s\", dir)\n}\nif fi, err := os.Lstat(targetPath); err == nil && fi.Mode()&os.ModeSymlink != 0 {\n    return fmt.Errorf(\"%s is a symlink; rename may cross devices\", targetPath)\n}","typeGuard":null,"tryCatchPattern":"var retryErr error\nfor attempt := 0; attempt < 3; attempt++ {\n    err := commitAutoCodeFileTask(task, publish, persist)\n    if err == nil { retryErr = nil; break }\n    var perr *fs.PathError\n    if errors.As(err, &perr) && (errors.Is(perr.Err, syscall.EBUSY) || isWindowsSharingViolation(perr)) {\n        time.Sleep(500 * time.Millisecond)\n        retryErr = err\n        continue\n    }\n    retryErr = err\n    break\n}","preventionTips":["Stop `go run`, vite/webpack dev servers and editors before generating (critical on Windows)","Exclude project dirs from real-time AV scanning to avoid sharing violations","Never make generated paths symlinks or mount points","Ensure the service user has write+execute on all generated directories"],"tags":["go","filesystem","rename","atomic-write","windows"],"backgroundTag":"file-rename-locked","analyzedSha":"3136500ef380842b0eb6c4daa87c3f8a47fcf9e0","analyzedAt":"2026-08-31T13:50:02.721Z","schemaVersion":2},"datasetVersion":"2026-08-31T19:17:28.585Z"}