code: def save_script_rc(script_path="scripts/scriptrc", **env_vars):
      
      juju_rc_path = "%s/%s" % (charm_dir(), script_path)
      if not os.path.exists(os.path.dirname(juju_rc_path)):
          os.mkdir(os.path.dirname(juju_rc_path))
      with open(juju_rc_path, 'wt') as rc_script:
          rc_script.write(
              "#!/bin/bash\n")
          [rc_script.write('export %s=%s\n' % (u, p))
           for u, p in six.iteritems(env_vars) if u != "script_path"]
docs: Write an rc file in the charm-delivered directory containing
      exported environment variables provided by env_vars. Any charm scripts run
      outside the juju hook environment can source this scriptrc to obtain
      updated config information necessary to perform health checks or
      service changes.