Function tanstackLinkEdges

src/resolution/tanstack-router-synthesizer.ts:49–108

(ctx: ResolutionContext, onYield: MaybeYield)

const MAX_LINKS_PER_COMPONENT = 24;

export async function tanstackLinkEdges(ctx: ResolutionContext, onYield: MaybeYield): Promise<Edge[]> {
  const table = tanstackTable(ctx);
  if (table.byRoot.size === 0) return [];
  const edges: Edge[] = [];
  const seen = new Set<string>();
  const perComponent = new Map<string, number>();
  let scanned = 0;
  for (const file of ctx.getAllFiles()) {
    if (!JSX_FILE.test(file) || isTestPath(file)) continue;
    const routes = routesForFile(table, file);
    if (!routes || routes.exact.size === 0) continue;
    if ((++scanned & 63) === 0) await onYield();
    const source = ctx.readFile(file);
    if (!source || !HAS_LINK_TAG.test(source)) continue;
    const safe = stripCommentsForRegex(source, 'typescript');
    const nodes = ctx.getNodesInFile(file);
    const lineOf = makeLineAt(safe, 1);
    LINK_TAG.lastIndex = 0;
    let m: RegExpExecArray | null;
    while ((m = LINK_TAG.exec(safe)) !== null) {
      let literal: string | null = m[3] ?? m[4] ?? null;
      if (literal === null) {
        // `to={…}`: a string or a template.
        const at = m.index + m[0].length;
        const ch = safe[at];
        if (ch === '"' || ch === "'" || ch === '`') literal = readStringAt(safe, at);
      }
      if (literal === null) continue;
      const href = tanstackDestination(JSON.stringify(literal));
      if (!href) continue;
      const line = lineOf(m.index);
      const component = enclosingFn(nodes, line);
      if (!component) continue;
      // A destination written as a choice names one route per arm, and the
      // user reaches every one of them — each is drawn.
      for (const { node: route, href: arm } of destinationsForHref(href, routes)) {
        const key = `${component.id}>${route.id}`;
        if (seen.has(key)) continue;
        const count = (perComponent.get(component.id) ?? 0) + 1;
        perComponent.set(component.id, count);
        if (count > MAX_LINKS_PER_COMPONENT) continue;
        seen.add(key);
        edges.push({
          source: component.id,
          target: route.id,
          kind: 'navigates',
          line,
          provenance: 'heuristic',
          metadata: {
            synthesizedBy: 'tanstack-link',
            href: arm.display,
            navMethod: m[1] === 'Navigate' ? 'navigate' : 'link',
            registeredAt: `${file}:${line}`,
          },
        });
      }
    }
  }