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restore.go
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restore.go
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package db
import (
"os"
"path"
"strings"
"github.com/pkg/errors"
"github.com/prysmaticlabs/prysm/beacon-chain/db/kv"
"github.com/prysmaticlabs/prysm/shared/cmd"
"github.com/prysmaticlabs/prysm/shared/fileutil"
"github.com/prysmaticlabs/prysm/shared/promptutil"
"github.com/urfave/cli/v2"
)
const dbExistsYesNoPrompt = "A database file already exists in the target directory. " +
"Are you sure that you want to overwrite it? [y/n]"
func restore(cliCtx *cli.Context) error {
sourceFile := cliCtx.String(cmd.RestoreSourceFileFlag.Name)
targetDir := cliCtx.String(cmd.RestoreTargetDirFlag.Name)
restoreDir := path.Join(targetDir, kv.BeaconNodeDbDirName)
if fileutil.FileExists(path.Join(restoreDir, kv.DatabaseFileName)) {
resp, err := promptutil.ValidatePrompt(
os.Stdin, dbExistsYesNoPrompt, promptutil.ValidateYesOrNo,
)
if err != nil {
return errors.Wrap(err, "could not validate choice")
}
if strings.EqualFold(resp, "n") {
log.Info("Restore aborted")
return nil
}
}
if err := fileutil.MkdirAll(restoreDir); err != nil {
return err
}
if err := fileutil.CopyFile(sourceFile, path.Join(restoreDir, kv.DatabaseFileName)); err != nil {
return err
}
log.Info("Restore completed successfully")
return nil
}