Function resolveLuaRequire

src/resolution/import-resolver.ts:1688–1718

* Resolve a Lua/Luau `require(...)` to its module file. The reference name is * either a dotted module path (`telescope.config` → `telescope/config.lua`) or a * Roblox instance-path leaf (`Signal` from `require(script.Parent.Signal)` → * `Signal.luau`). We try ` .lua|.luau` and ` /init.

(ref: UnresolvedRef, context: ResolutionContext)

 * requiring file wins (instance-path requires resolve within the same package).
 */
function resolveLuaRequire(ref: UnresolvedRef, context: ResolutionContext): ResolvedRef | null {
  const name = ref.referenceName;
  if (!name) return null;
  const base = name.includes('.') ? name.replace(/\./g, '/') : name;
  const suffixes = [`${base}.lua`, `${base}.luau`, `${base}/init.lua`, `${base}/init.luau`];
  const byBasename = luaBasenameIndex(context);
  const shared = (a: string, b: string): number => {
    let i = 0;
    while (i < a.length && i < b.length && a[i] === b[i]) i++;
    return i;
  };
  for (const suffix of suffixes) {
    // Only files sharing the suffix's basename can match — the bucket is in
    // getAllFiles() order, so this filter yields exactly what the full-list
    // scan did.
    const candidates = byBasename.get(suffix.split('/').pop() ?? '') ?? [];
    const matches = candidates.filter((f) => f === suffix || f.endsWith('/' + suffix));
    if (matches.length === 0) continue;
    matches.sort((x, y) => shared(y, ref.filePath) - shared(x, ref.filePath));
    const best = matches[0]!;
    if (best === ref.filePath) continue;
    const fileNode = context.getNodesInFile(best).find((n) => n.kind === 'file');
    if (fileNode) {
      // Confidence ≥ 0.9 so this deterministic path/suffix match wins over
      // name-matching, which otherwise resolves the require to the import node
      // itself (a same-name self-match).
      return { original: ref, targetNodeId: fileNode.id, confidence: 0.9, resolvedBy: 'import' };
    }
  }
  return null;
}

function resolveModuleImportToFile(
  ref: UnresolvedRef,