Function scanDirectoryAsync

src/extraction/index.ts:1217–1243

(
  rootDir: string,
  onProgress?: (current: number, file: string) => void
)

 * allowing worker threads to receive and render progress messages.
 */
export async function scanDirectoryAsync(
  rootDir: string,
  onProgress?: (current: number, file: string) => void
): Promise<string[]> {
  // Custom extension → language overrides from the project's codegraph.json.
  const overrides = loadExtensionOverrides(rootDir);

  const gitFiles = getGitVisibleFiles(rootDir);
  if (gitFiles) {
    const files: string[] = [];
    let count = 0;
    for (const filePath of gitFiles) {
      if (isSourceFile(filePath, overrides)) {
        files.push(filePath);
        count++;
        onProgress?.(count, filePath);
        // Yield every 100 files so worker threads can render progress
        if (count % 100 === 0) {
          await new Promise<void>(r => setImmediate(r));
        }
      }
    }
    return files;
  }

  return scanDirectoryWalk(rootDir, onProgress);
}

/**
 * Filesystem walk fallback for non-git projects.