ceremonyclient/pebble/filenames.go

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2024-01-03 07:31:42 +00:00
// Copyright 2012 The LevelDB-Go and Pebble Authors. All rights reserved. Use
// of this source code is governed by a BSD-style license that can be found in
// the LICENSE file.
package pebble
import (
"fmt"
"github.com/cockroachdb/pebble/internal/base"
"github.com/cockroachdb/pebble/vfs"
)
type fileType = base.FileType
// FileNum is an identifier for a file within a database.
type FileNum = base.FileNum
const (
fileTypeLog = base.FileTypeLog
fileTypeLock = base.FileTypeLock
fileTypeTable = base.FileTypeTable
fileTypeManifest = base.FileTypeManifest
fileTypeCurrent = base.FileTypeCurrent
fileTypeOptions = base.FileTypeOptions
fileTypeTemp = base.FileTypeTemp
fileTypeOldTemp = base.FileTypeOldTemp
)
// setCurrentFile sets the CURRENT file to point to the manifest with
// provided file number.
//
// NB: This is a low-level routine and typically not what you want to
// use. Newer versions of Pebble running newer format major versions do
// not use the CURRENT file. See setCurrentFunc in version_set.go.
func setCurrentFile(dirname string, fs vfs.FS, fileNum base.DiskFileNum) error {
newFilename := base.MakeFilepath(fs, dirname, fileTypeCurrent, fileNum)
oldFilename := base.MakeFilepath(fs, dirname, fileTypeTemp, fileNum)
fs.Remove(oldFilename)
f, err := fs.Create(oldFilename)
if err != nil {
return err
}
if _, err := fmt.Fprintf(f, "MANIFEST-%s\n", fileNum); err != nil {
return err
}
if err := f.Sync(); err != nil {
return err
}
if err := f.Close(); err != nil {
return err
}
return fs.Rename(oldFilename, newFilename)
}