gistfile1.txt

@NonCPS
def getAllCauses() {
  currentBuild.rawBuild.getCauses().toString()
}

@NonCPS
def isIssueCommentCause() {
  def triggerCause = currentBuild.rawBuild.getCause(org.jenkinsci.plugins.pipeline.github.trigger.IssueCommentCause)    
  if (triggerCause) {
    env.TRIGGER_COMMENT=triggerCause.comment
    echo("Build was started by ${triggerCause.userLogin}, who wrote: " +
         "\"${triggerCause.comment}\", which matches the " +
         "\"${triggerCause.triggerPattern}\" trigger pattern.")
  } else {
    echo('Build was not started by a trigger')
  }
}

          echo getAllCauses()
          isIssueCommentCause();
          
                    echo env.TRIGGER_COMMENT
          if (env.TRIGGER_COMMENT && env.CHANGE_ID) {

            def matcher = env.TRIGGER_COMMENT =~ /\/tf (?<op>\w+) (?<args>.*)/
            if( matcher.matches() ) {
              def op = matcher.group( 'op' )
              switch (op) {
                case 'plan':
                  echo "tf plan andy"
                break;
                default:
                  error("operation not supported ${op}")
                break;
              }
            }
            pullRequest.comment('matched trigger for comment')
          }
          
          
          
          for (commitFile in pullRequest.files) {
            echo "SHA: ${commitFile.sha} File Name: ${commitFile.filename} Status: ${commitFile.status}"
          }

          for (commit in pullRequest.commits) {
            echo "SHA: ${commit.sha}, Committer: ${commit.committer}, Commit Message: ${commit.message}"
          }