code: def main():
      
      run_config = _parse_args(sys.argv[1:])
      gitlab_config = GitLabConfig(run_config.url, run_config.token)
      manager = ProjectVariablesManager(gitlab_config, run_config.project)
      variables = {}  # type: Dict[str, str]
      for source in run_config.source:
          variables.update(read_variables(source))
      manager.set(variables)
      print("Variables for project \"%s\" set to: %s" % (run_config.project, manager.get()))
docs: Main method.