Function createFallbackIssue

actions/setup/js/create_pull_request.cjs:368–401

* Creates a fallback GitHub issue, retrying on rate-limit and other transient errors * (with exponential back-off) and retrying without assignees if the API rejects them. * This ensures fallback issue creation remains reliable even if an assignee username * is invalid, the repository does not hav

(githubClient, repoParts, title, body, labels, assignees)

 * @returns {Promise<any>}
 */
async function createFallbackIssue(githubClient, repoParts, title, body, labels, assignees) {
  const payload = {
    owner: repoParts.owner,
    repo: repoParts.repo,
    title,
    body,
    labels,
    ...(assignees && assignees.length > 0 && { assignees }),
  };

  return withRetry(
    async () => {
      try {
        return await githubClient.rest.issues.create(payload);
      } catch (error) {
        const status = typeof error === "object" && error !== null && "status" in error ? error.status : undefined;
        const message = getErrorMessage(error).toLowerCase();
        const isAssigneeError = status === 422 && (message.includes("assignee") || message.includes("assignees") || message.includes("unprocessable"));
        if (isAssigneeError && payload.assignees && payload.assignees.length > 0) {
          const removedAssignees = payload.assignees.join(", ");
          core.warning(`Fallback issue creation failed due to assignee error, retrying without assignees: ${getErrorMessage(error)}`);
          // Mutate payload in-place so that any subsequent withRetry attempts also
          // omit assignees and do not re-trigger the same 422 path.
          delete payload.assignees;
          payload.body = `${payload.body}\n\n> [!NOTE]\n> Assignees (${removedAssignees}) could not be set on this issue due to an API error.`;
          return await githubClient.rest.issues.create(payload);
        }
        throw error;
      }
    },
    RATE_LIMIT_RETRY_CONFIG,
    `create fallback issue in ${repoParts.owner}/${repoParts.repo}`
  );
}

/**
 * Maximum limits for pull request parameters to prevent resource exhaustion.