function search()

in packages/jest-haste-map/src/crawlers/node.ts [69:124]
46 lines of code
14 McCabe index (conditional complexity)

  function search(directory: string): void {
    activeCalls++;
    fs.readdir(directory, {withFileTypes: true}, (err, entries) => {
      activeCalls--;
      if (err) {
        if (activeCalls === 0) {
          callback(result);
        }
        return;
      }
      entries.forEach(entry => {
        const file = path.join(directory, entry.name);

        if (ignore(file)) {
          return;
        }

        if (entry.isSymbolicLink()) {
          return;
        }
        if (entry.isDirectory()) {
          search(file);
          return;
        }

        activeCalls++;

        const stat = enableSymlinks ? fs.stat : fs.lstat;

        stat(file, (err, stat) => {
          activeCalls--;

          // This logic is unnecessary for node > v10.10, but leaving it in
          // since we need it for backwards-compatibility still.
          if (!err && stat && !stat.isSymbolicLink()) {
            if (stat.isDirectory()) {
              search(file);
            } else {
              const ext = path.extname(file).substr(1);
              if (extensions.indexOf(ext) !== -1) {
                result.push([file, stat.mtime.getTime(), stat.size]);
              }
            }
          }

          if (activeCalls === 0) {
            callback(result);
          }
        });
      });

      if (activeCalls === 0) {
        callback(result);
      }
    });
  }