Function executePRUpdate

actions/setup/js/update_pull_request.cjs:66–169

* Execute the pull request update API call * @param {any} github - GitHub API client * @param {any} context - GitHub Actions context * @param {number} prNumber - PR number to update * @param {any} updateData - Data to update * @returns {Promise } Updated pull request

(github, context, prNumber, updateData)

 * @returns {Promise<any>} Updated pull request
 */
async function executePRUpdate(github, context, prNumber, updateData) {
  // Handle body operation (append/prepend/replace/replace-island)
  const operation = updateData._operation || "replace";
  const rawBody = updateData._rawBody;
  const includeFooter = updateData._includeFooter !== false; // Default to true

  // Remove internal fields (including update_branch which is handled separately below)
  const { _operation, _rawBody, _includeFooter, _workflowRepo, update_branch, ...apiData } = updateData;
  const updateBranch = update_branch === true;

  if (updateBranch) {
    core.info(`Updating pull request #${prNumber} branch with base branch changes`);
    try {
      await withRetry(
        () =>
          github.rest.pulls.updateBranch({
            owner: context.repo.owner,
            repo: context.repo.repo,
            pull_number: prNumber,
          }),
        {
          maxRetries: 1,
          initialDelayMs: 0,
          jitterMs: 0,
          shouldRetry: isTransientError,
        },
        `update pull request #${prNumber} branch from base`
      );
    } catch (error) {
      const errorMessage = getErrorMessage(error);
      if (isNonFatalUpdateBranchError(error)) {
        core.warning(`Failed to update pull request #${prNumber} branch from base (non-fatal): ${errorMessage}`);
      } else {
        core.warning(`Failed to update pull request #${prNumber} branch from base: ${errorMessage}`);
        throw error;
      }
    }
  }

  // If we have a body, process it with the appropriate operation
  if (rawBody !== undefined) {
    // Fetch current PR body for all operations (needed for append/prepend/replace-island/replace)
    const { data: currentPR } = await github.rest.pulls.get({
      owner: context.repo.owner,
      repo: context.repo.repo,
      pull_number: prNumber,
    });
    const currentBody = currentPR.body || "";

    // Get workflow run URL for AI attribution.
    // Use the original workflow repo (_workflowRepo) rather than context.repo, because
    // context may be effectiveContext with repo overridden to a cross-repo target.
    const workflowName = process.env.GH_AW_WORKFLOW_NAME || "GitHub Agentic Workflow";
    const workflowId = process.env.GH_AW_WORKFLOW_ID || "";
    const callerWorkflowId = process.env.GH_AW_CALLER_WORKFLOW_ID || "";
    const workflowRepo = _workflowRepo || context.repo;
    const runUrl = buildWorkflowRunUrl(context, workflowRepo);