func saveIndex(m *model.Model) {
name := m.RepoID() + ".idx.gz"
fullName := path.Join(opts.ConfDir, name)
idxf, err := os.Create(fullName + ".tmp")
if err != nil {
return
}
gzw := gzip.NewWriter(idxf)
protocol.WriteIndex(gzw, m.ProtocolIndex())
gzw.Close()
idxf.Close()
os.Rename(fullName+".tmp", fullName)
}