Function buildTocIndex

scripts/verify-internal-links-in-toc.js:94–120

(tocFiles)

}

function buildTocIndex(tocFiles) {
  const tocToPages = new Map(); // tocFile -> Set(relPathWithoutLeadingSlash)
  const anyTocPages = new Set();
  const pageToTocs = new Map(); // pageRel -> Set(tocFile)

  tocFiles.forEach((toc) => {
    const tocAbs = path.join(ROOT, toc);
    const pages = new Set();

    extractInternalDocTargetsFromMarkdownFile(tocAbs).forEach((rel) => {
      pages.add(rel);
      anyTocPages.add(rel);

      const tocs = pageToTocs.get(rel) || new Set();
      tocs.add(toc);
      pageToTocs.set(rel, tocs);
    });

    tocToPages.set(toc, pages);
  });

  const cloudTocPages = new Set(
    CLOUD_TOC_FILES.flatMap((toc) => [...(tocToPages.get(toc) || new Set())])
  );

  return { tocToPages, anyTocPages, pageToTocs, cloudTocPages };
}

function expectedSetForTarget(targetRel, tocToPages, anyTocPages, cloudTocPages) {
  if (