public static String resolveRepoUrl(String repoUrl){
  Repositories repositories=Repositories.get();
  return resolveRepoUrl(repositories,repoUrl);
}

public static String resolveRepoUrl ( String repoUrl ) { Repositories repositories = Repositories . get ( ) ; return resolveRepoUrl ( repositories , repoUrl ) ; }
resolves a repository url that can possibly contain a + - reference to a system repository or a user repository definition in the configuration file to one that is either a plain file system path or a remote url
