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package backup
import (
"archive/tar"
"context"
"errors"
"io"
"github.com/lxc/incus/v6/internal/server/sys"
"github.com/lxc/incus/v6/shared/archive"
)
// TarReader rewinds backup file handle r and returns new tar reader and process cleanup function.
func TarReader(r io.ReadSeeker, sysOS *sys.OS, outputPath string) (*tar.Reader, context.CancelFunc, error) {
_, err := r.Seek(0, io.SeekStart)
if err != nil {
return nil, nil, err
}
_, _, unpacker, err := archive.DetectCompressionFile(r)
if err != nil {
return nil, nil, err
}
if unpacker == nil {
return nil, nil, errors.New("Unsupported backup compression")
}
tr, cancelFunc, err := archive.CompressedTarReader(context.Background(), r, unpacker, outputPath)
if err != nil {
return nil, nil, err
}
return tr, cancelFunc, nil
}
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