code: func (m *Meta) RebaseConfigDir(root string) {
  	if m.ConfigDir != "" && m.ConfigDir != "-" {
  		m.ConfigDir = filepath.Join(root, filepath.FromSlash(m.ConfigDir))
  	}
  }
docs: // RebaseConfigDir changes ConfigDir, if it is set, to be absolute by appending
  // it to the given root.
  //
  // Doesn't touch "-", which indicates "stdout".