forked from wal-g/wal-g
/
file_tar_interpreter.go
62 lines (55 loc) · 1.87 KB
/
file_tar_interpreter.go
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package internal
import (
"archive/tar"
"io"
"os"
"path"
"github.com/T0n0T/wal-g/utility"
"github.com/pkg/errors"
"github.com/spf13/viper"
"github.com/wal-g/tracelog"
)
type FileTarInterpreter struct {
DirectoryToSave string
fsync bool
}
func NewFileTarInterpreter(directoryToSave string) TarInterpreter {
return &FileTarInterpreter{
DirectoryToSave: directoryToSave,
fsync: !viper.GetBool(TarDisableFsyncSetting),
}
}
func (tarInterpreter *FileTarInterpreter) Interpret(reader io.Reader, fileInfo *tar.Header) error {
tracelog.DebugLogger.Println("Interpreting: ", fileInfo.Name)
targetPath := path.Join(tarInterpreter.DirectoryToSave, fileInfo.Name)
switch fileInfo.Typeflag {
case tar.TypeReg, tar.TypeRegA:
return tarInterpreter.interpretRegularFile(targetPath, fileInfo, reader)
case tar.TypeDir:
err := os.MkdirAll(targetPath, 0755)
if err != nil {
return errors.Wrapf(err, "Interpret: failed to create all directories in %s", targetPath)
}
if err = os.Chmod(targetPath, os.FileMode(fileInfo.Mode)); err != nil {
return errors.Wrap(err, "Interpret: chmod failed")
}
case tar.TypeLink:
if err := os.Link(fileInfo.Name, targetPath); err != nil {
return errors.Wrapf(err, "Interpret: failed to create hardlink %s", targetPath)
}
case tar.TypeSymlink:
if err := os.Symlink(fileInfo.Linkname, targetPath); err != nil {
return errors.Wrapf(err, "Interpret: failed to create symlink %s", targetPath)
}
}
return nil
}
func (tarInterpreter *FileTarInterpreter) interpretRegularFile(targetPath string, header *tar.Header, reader io.Reader) error {
localFile, _, err := utility.GetLocalFile(targetPath, header)
if err != nil {
return err
}
defer utility.LoggedClose(localFile, "")
defer utility.LoggedSync(localFile, "", tarInterpreter.fsync)
return utility.WriteLocalFile(reader, header, localFile, tarInterpreter.fsync)
}