install.xml

<?xml version="1.0" encoding="utf-8"?>
<modification>
  <name>PagSeguro Checkout Transparente</name>
  <code>valdeir_pagseguro_checkout_transparente</code>
  <version>2.1.0</version>
  <author>Valdeir S.</author>
  <link>https://valdeir.dev</link>

  <file path="catalog/view/theme/*/template/account/order_info.twig">
    <operation>
      <search>
        <![CDATA[{{ continue }}]]>
      </search>
      <add position="before">
        <![CDATA[
        {% if boleto %}
        <div class="pull-left"><a href="{{ boleto }}" class="btn btn-primary" target="_blank">2ª via do boleto</a></div>
        {% endif %}
        ]]>
      </add>
    </operation>
  </file>

  <file path="admin/view/template/sale/order_info.twig">
    <operation>
      <search>
        <![CDATA[<h3 class="panel-title"><i class="fa fa-comment-o"></i> {{ text_history }}</h3>]]>
      </search>
      <add position="before" offset="2">
        <![CDATA[
        {{ pagseguro }}
        ]]>
      </add>
    </operation>
  </file>

  <file path="system/library/template/twig.php">
	  <operation>
      <search>
        <![CDATA[$file = DIR_TEMPLATE . $filename . '.twig';]]>
      </search>
      <add position="after">
        <![CDATA[
          if (version_compare(VERSION, '3.0.3.6', '==')) {
            $file_ocmod = DIR_MODIFICATION . $filename . '.twig';

            $application_folder = basename(DIR_APPLICATION);
            $folder_ocmod_template = str_replace(DIR_APPLICATION, $application_folder . '/', DIR_TEMPLATE);
            $file_ocmod = DIR_MODIFICATION . $folder_ocmod_template . $filename . '.twig';

            if (is_file($file_ocmod)) {
              $file = $file_ocmod;
            }
          }
        ]]>
      </add>
    </operation>
  </file>
</modification>