Function guardsForFile

src/graph/branch-guards.ts:248–263

(
  absPath: string,
  language: Language,
  sites: readonly CallSite[]
)

 * empty map.
 */
export async function guardsForFile(
  absPath: string,
  language: Language,
  sites: readonly CallSite[]
): Promise<Map<string, BranchGuard[]>> {
  const out = new Map<string, BranchGuard[]>();
  if (!supportsBranchGuards(language) || sites.length === 0) return out;
  const cached = await treeFor(absPath, language);
  if (!cached) return out;
  for (const site of sites) {
    const key = siteKey(site);
    if (out.has(key)) continue;
    out.set(key, guardsInTree(cached.tree.rootNode, cached.source, language, site.line, site.column ?? null));
  }
  return out;
}

/**
 * Synchronous twin of {@link guardsForFile} for callers that cannot await