Map jekyll to ER

gistfile1.txt

  foreach (field_info_instances('node', 'post') as $field_name => $instance) {
    if (empty($instance['settings']['jekyll_map'])) {
      continue;
    }

    // The Jekyll variable name.
    $jekyll = $instance['settings']['jekyll_map'];
    $field = field_info_field($field_name);

    switch ($field['type']) {
      case 'entityreference':
      case 'taxonomy_term':
        if ($field['cardinality'] == 1) {
          $overrides[$jekyll] = $wrapper->{$field_name}->label();
        }
        else {
          foreach ($wrapper->{$field_name} as $sub_wrapper) {
            $overrides[$jekyll][] = $sub_wrapper->label();
          }
        }
        break;
      default:
        if ($field['cardinality'] == 1) {
          $overrides[$jekyll] = $wrapper->{$field_name}->value();
        }
        else {
          foreach ($wrapper->{$field_name} as $sub_wrapper) {
            $overrides[$jekyll][] = $sub_wrapper->value();
          }
        }
        break;
    }
  }

  $overrides['title'] = $wrapper->label();