function magic_generate_path_regex in Magic 7

Helper function for generating a regex from a list of paths.

Generates a single regex from a list of file paths that can be used to match JS or CSS files using preg_grep() for example in hook_css_alter() or hook_js_alter(). The '*' (asterisk) character can be used as a wild-card.

Parameters

$paths: An array of file paths.

Return value

string The generated regex.

See also

hook_js_alter()

hook_css_alter()

1 call to magic_generate_path_regex()

magic_extension_assets_theme_settings_form_submit in ./magic.module

Submit handler for the theme settings form.

File

includes/magic.inc, line 94

A file to contain functions for the magic module to abuse.

Code

function magic_generate_path_regex($paths) {
  foreach ($paths as &$item) {

    // The first segment (everything before the first slash) is the namespace.
    // This rule only applies to local files... So if the namespace can not be
    // mapped to a module, profile or theme engine we assume that the we are
    // trying to target an external file.
    list($namespace) = explode('/', $item);

    // Check if the namespace refers to a file residing in the 'misc' folder.
    if ($namespace != '*') {

      // Otherwise, check if it refers to a theme, module, profile or theme
      // engine.
      foreach (array(
        'theme',
        'module',
        'profile',
        'theme_engine',
      ) as $type) {

        // We can't use drupal_get_path() directly because that uses dirname()
        // internally which returns '.' if no filename was found.
        if ($filename = drupal_get_filename($type, $namespace)) {
          $prefix = dirname($filename);
          $item = substr_replace($item, $prefix, 0, strlen($namespace));
          break;
        }
      }
    }

    // Escape any regex characters and turn asterisk wildcards into actual regex
    // wildcards.
    $item = preg_quote($item, '/');
    $item = str_replace('\\*', '(.*)', $item);
  }
  return empty($paths) ? FALSE : '/^(' . implode('|', $paths) . ')$/';
}