drupack.theme

<?php

/**
 * Implements @see hook_library_info_alter().
 *
 * This is where — magic — happens.
 */
function drupack_library_info_alter(array &$libraries, string $extension): void
{
    $themes = \Drupal::service('extension.list.theme');

    if (!$themes->exists($extension)) {
        return;
    }

    $themePath = $themes->getPath($extension);
    $resourcesDir = 'public/resources';
    $manifestPath = $themePath . '/' . $resourcesDir . '/asset-manifest.json';

    if (!file_exists($manifestPath)) {
        return;
    }

    $manifestFile = file_get_contents($manifestPath);
    $manifest = json_decode($manifestFile, true);

    foreach ($manifest['entrypoints'] as $entrypoints => $entrypoint) {
        foreach ($entrypoint as $entry => $files) {
            $libraries[$entry]['version'] = 'VERSION';

            foreach ($files as $file) {
                $pathinfo = pathinfo($file);

                switch ($pathinfo['extension']) {
                    case 'css':
                        $libraries[$entry]['css']['theme'][$resourcesDir . '/' . $file] = ['preprocess' => false, 'minified' => true];
                        break;
                    case 'js':
                        $libraries[$entry]['js'][$resourcesDir . '/' . $file] = ['preprocess' => false, 'minified' => true];
                        break;
                }
            }
        }
    }
}