span="${trace:0:16}"
    export TRACEPARENT="01-${trace}-${span}-00"
  fi
}

function _genattrs() {
  # No upstream standard, so copy from https://github.com/jenkinsci/opentelemetry-plugin/blob/master/docs/job-traces.md
  if [[ -n "${PULL_NUMBER:=}" ]]
  then
    # Presubmit
    url="https://prow.istio.io/view/gs/istio-prow/pr-logs/pull/${REPO_OWNER}_${REPO_NAME}/${PULL_NUMBER}/${JOB_NAME}/${BUILD_ID},"
  else