old_contents: """Notify Slack channel."""
  import time
  
  from ..utils import get_properties, get_template, post_slack_message
  
  
  class SlackNotification:
      """Post slack notification.
  
      Inform users about infrastructure changes to prod* accounts.
      """
  
      def __init__(self, app=None, env=None, prop_path=None):
          self.info = {'app': app, 'env': env, 'properties': prop_path}
          timestamp = time.strftime("%B %d, %Y %H:%M:%S %Z", time.gmtime())
          self.info['timestamp'] = timestamp
          self.settings = get_properties(self.info['properties'])
          self.info['config_commit_short'] = self.settings['pipeline'][
              'config_commit'][0:11]
  
      def post_message(self):
          """Send templated message to **#deployments-{env}**."""
          message = get_template(
              template_file='slack-templates/pipeline-prepare-ran.j2',
              info=self.info)
          channel = '#deployments-{}'.format(self.info['env'].lower())
          post_slack_message(message, channel)
  
      def notify_slack_channel(self):
          """Post message to a defined Slack channel."""
          if self.settings['pipeline']['notifications']['slack']:
              post_slack_message(
                  message, self.settings['pipeline']['notifications']['slack'])
  
new_contents: """Notify Slack channel."""
  import time
  
  from ..utils import get_properties, get_template, post_slack_message
  
  
  class SlackNotification:
      """Post slack notification.
  
      Inform users about infrastructure changes to prod* accounts.
      """
  
      def __init__(self, app=None, env=None, prop_path=None):
          self.info = {'app': app, 'env': env, 'properties': prop_path}
          timestamp = time.strftime("%B %d, %Y %H:%M:%S %Z", time.gmtime())
          self.info['timestamp'] = timestamp
          self.settings = get_properties(self.info['properties'])
          self.info['config_commit_short'] = self.settings['pipeline'][
              'config_commit'][0:11]
  
      def post_message(self):
          """Send templated message to **#deployments-{env}**."""
          message = get_template(
              template_file='slack-templates/pipeline-prepare-ran.j2',
              info=self.info)
          channel = '#deployments-{}'.format(self.info['env'].lower())
          post_slack_message(message, channel)
  
      def notify_slack_channel(self):
          """Post message to a defined Slack channel."""
          message = get_template(
              template_file='slack-templates/pipeline-prepare-ran.j2',
              info=self.info)
  
          if self.settings['pipeline']['notifications']['slack']:
              post_slack_message(
                  message, self.settings['pipeline']['notifications']['slack'])
  
subject: Resolve `message` variable missing error