Detect if pipeline is launch manually or not

detect_who_launch_pipeline.groovy

script
{
  //before using this command line you should approve execution on https://jenkins_url/scriptApproval/
  launchManually = currentBuild.rawBuild.getCause(hudson.model.Cause$UserIdCause) != null
  if(launchManually)
  {
    echo "Manually launch"
  }
  else
  {
    echo "Automatic launch"
  }       
}