function LibraryDependencyResolver::getMinimalRepresentativeSubset

File

core/lib/Drupal/Core/Asset/LibraryDependencyResolver.php, line 81

Class

LibraryDependencyResolver

Resolves the dependencies of asset (CSS/JavaScript) libraries.

Namespace

Code

public function getMinimalRepresentativeSubset(array $libraries) {
  assert(count($libraries) === count(array_unique($libraries)), '$libraries can\'t contain duplicate items.');
  // Determine each library's dependencies.
  $all_dependencies = [];
  foreach ($libraries as $library) {
    $with_deps = $this->getLibrariesWithDependencies([
      $library,
    ]);
    // We don't need library itself listed in the dependencies.
    $all_dependencies += array_diff($with_deps, [
      $library,
    ]);
  }
  return array_values(array_diff($libraries, array_intersect($all_dependencies, $libraries)));
}