protected function GenerateTheme::execute in Drupal 9

File

core/lib/Drupal/Core/Command/GenerateTheme.php, line 54

Class

GenerateTheme

Generates a new theme based on latest default markup.

Namespace

Drupal\Core\Command

Code

protected function execute(InputInterface $input, OutputInterface $output) {
  $io = new SymfonyStyle($input, $output);

  // Change the directory to the Drupal root.
  chdir($this->root);

  // Path where the generated theme should be placed.
  $destination_theme = $input
    ->getArgument('machine-name');
  $default_destination = 'themes';
  $destination = trim($input
    ->getOption('path') ?: $default_destination, '/') . '/' . $destination_theme;
  if (is_dir($destination)) {
    $io
      ->getErrorStyle()
      ->error("Theme could not be generated because the destination directory {$destination} exists already.");
    return 1;
  }

  // Source directory for the theme.
  $source_theme_name = 'starterkit_theme';
  if (!($source_theme = $this
    ->getThemeInfo($source_theme_name))) {
    $io
      ->getErrorStyle()
      ->error("Theme source theme {$source_theme_name} cannot be found .");
    return 1;
  }
  $source = $source_theme
    ->getPath();
  if (!is_dir($source)) {
    $io
      ->getErrorStyle()
      ->error("Theme could not be generated because the source directory {$source} does not exist.");
    return 1;
  }
  $tmp_dir = $this
    ->getUniqueTmpDirPath();
  $this
    ->copyRecursive($source, $tmp_dir);

  // Rename files based on the theme machine name.
  $file_pattern = "/{$source_theme_name}\\.(theme|[^.]+\\.yml)/";
  if ($files = @scandir($tmp_dir)) {
    foreach ($files as $file) {
      $location = $tmp_dir . '/' . $file;
      if (is_dir($location)) {
        continue;
      }
      if (preg_match($file_pattern, $file, $matches)) {
        if (!rename($location, $tmp_dir . '/' . $destination_theme . '.' . $matches[1])) {
          $io
            ->getErrorStyle()
            ->error("The file {$location} could not be moved.");
          return 1;
        }
      }
    }
  }
  else {
    $io
      ->getErrorStyle()
      ->error("Temporary directory {$tmp_dir} cannot be opened.");
    return 1;
  }

  // Info file.
  $info_file = "{$tmp_dir}/{$destination_theme}.info.yml";
  if (!file_exists($info_file)) {
    $io
      ->getErrorStyle()
      ->error("The theme info file {$info_file} could not be read.");
    return 1;
  }
  $info = Yaml::decode(file_get_contents($info_file));
  $info['name'] = $input
    ->getOption('name') ?: $destination_theme;

  // Unhide hidden themes.
  unset($info['hidden']);
  $info['core_version_requirement'] = '^' . $this
    ->getVersion();
  if ($description = $input
    ->getOption('description')) {
    $info['description'] = $description;
  }
  else {
    unset($info['description']);
  }

  // Replace references to libraries.
  if (isset($info['libraries'])) {
    $info['libraries'] = preg_replace("/{$source_theme_name}(\\/.*)/", "{$destination_theme}\$1", $info['libraries']);
  }
  if (isset($info['libraries-extend'])) {
    foreach ($info['libraries-extend'] as $key => $value) {
      $info['libraries-extend'][$key] = preg_replace("/{$source_theme_name}(\\/.*)/", "{$destination_theme}\$1", $info['libraries-extend'][$key]);
    }
  }
  if (isset($info['libraries-override'])) {
    foreach ($info['libraries-override'] as $key => $value) {
      if (isset($info['libraries-override'][$key]['dependencies'])) {
        $info['libraries-override'][$key]['dependencies'] = preg_replace("/{$source_theme_name}(\\/.*)/", "{$destination_theme}\$1", $info['libraries-override'][$key]['dependencies']);
      }
    }
  }
  if (!file_put_contents($info_file, Yaml::encode($info))) {
    $io
      ->getErrorStyle()
      ->error("The theme info file {$info_file} could not be written.");
    return 1;
  }

  // Replace references to libraries in libraries.yml file.
  $libraries_file = "{$tmp_dir}/{$destination_theme}.libraries.yml";
  if (file_exists($libraries_file)) {
    $libraries = Yaml::decode(file_get_contents($libraries_file));
    foreach ($libraries as $key => $value) {
      if (isset($libraries[$key]['dependencies'])) {
        $libraries[$key]['dependencies'] = preg_replace("/{$source_theme_name}(\\/.*)/", "{$destination_theme}\$1", $libraries[$key]['dependencies']);
      }
    }
    if (!file_put_contents($libraries_file, Yaml::encode($libraries))) {
      $io
        ->getErrorStyle()
        ->error("The libraries file {$libraries_file} could not be written.");
      return 1;
    }
  }

  // Rename hooks.
  $theme_file = "{$tmp_dir}/{$destination_theme}.theme";
  if (file_exists($theme_file)) {
    if (!file_put_contents($theme_file, preg_replace("/(function )({$source_theme_name})(_.*)/", "\$1{$destination_theme}\$3", file_get_contents($theme_file)))) {
      $io
        ->getErrorStyle()
        ->error("The theme file {$theme_file} could not be written.");
      return 1;
    }
  }

  // Rename references to libraries in templates.
  $iterator = new TemplateDirIterator(new \RegexIterator(new \RecursiveIteratorIterator(new \RecursiveDirectoryIterator($tmp_dir), \RecursiveIteratorIterator::LEAVES_ONLY), '/' . preg_quote('.html.twig') . '$/'));
  foreach ($iterator as $template_file => $contents) {
    $new_template_content = preg_replace("/(attach_library\\(['\")]){$source_theme_name}(\\/.*['\"]\\))/", "\$1{$destination_theme}\$2", $contents);
    if (!file_put_contents($template_file, $new_template_content)) {
      $io
        ->getErrorStyle()
        ->error("The template file {$template_file} could not be written.");
      return 1;
    }
  }
  if (!rename($tmp_dir, $destination)) {
    $io
      ->getErrorStyle()
      ->error("The theme could not be moved to the destination: {$destination}.");
    return 1;
  }
  $output
    ->writeln(sprintf('Theme generated successfully to %s', $destination));
  return 0;
}