Function buildExperimentAttributes

actions/setup/js/send_otlp_span.cjs:691–709

* Build OTLP span attributes for the active experiment assignments. * * Adds one `gh-aw.experiment. ` attribute per experiment (carrying the * selected variant string) and a single `gh-aw.experiments` attribute with a * compact JSON string of only the valid emitted assignments (key-sorted f

(assignments)

 * @returns {Array<{key: string, value: object}>}
 */
function buildExperimentAttributes(assignments) {
  if (!assignments || typeof assignments !== "object") return [];
  const names = Object.keys(assignments).sort();
  if (names.length === 0) return [];
  const attrs = [];
  /** @type {Record<string, string>} */
  const validAssignments = {};
  for (const name of names) {
    const variant = assignments[name];
    if (typeof variant === "string" && variant) {
      attrs.push(buildAttr(`gh-aw.experiment.${name}`, variant));
      validAssignments[name] = variant;
    }
  }
  if (attrs.length > 0) {
    attrs.push(buildAttr("gh-aw.experiments", JSON.stringify(validAssignments)));
  }
  return attrs;
}

// ---------------------------------------------------------------------------
// Custom OTLP attributes (GH_AW_OTLP_ATTRIBUTES)