Allow sh to return exit status, stdout and stderr all at once

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      Like many of the commenters on -JENKINS-26133- I'd like to be able to capture the exit status and text written to standard out at the same time.

      My current use case is calling git merge --no-edit $branches and if there was an error sending a slack notification with the output. 

      The current workaround is:

      def status = sh(returnStatus: true, script: "git merge --no-edit $branches > merge_output.txt")
if (status != 0) {
  currentBuild.result = 'FAILED'
  def output = readFile('merge_output.txt').trim()
  slackSend channel: SLACK_CHANNEL, message: "<${env.JOB_URL}|${env.JOB_NAME}> ran into an error merging the PR branches into the ${TARGET_BRANCH} branch:\n```\n${output}\n```\n<${env.BUILD_URL}/console|See the full output>", color: 'warning', tokenCredentialId: 'slack-token'
  error 'Merge conflict'
}
sh 'rm merge_output.txt'

      Which works but isn't a great developer experience... It would be great if I could request an object that contained: status, stdout, and stderr.

            Assignee:
            Unassigned
            Reporter:
            andrew morton
            Archiver:
            Jenkins Service Account

              Created:
              Updated:
              Archived: