Allow theme template block override

[dfrojas]

Description

This PR is a feature already added in master upstream that allows overriding a template block. This is the PR already merged in master: https://github.com/edx/edx-platform/pull/15947. We need to add it to our ginkgo master.

How to test (textually from original PR)

1. Create a test theme:

• make a directory /edx/app/edxapp/themes/testtheme

• create a template at /edx/app/edxapp/themes/testtheme/lms/templates/dashboard.html, and put this content into it:

<%inherit file="dashboard.html" />
<%block name="pagetitle">Overridden Title!</%block>
${parent.body()}

If you want, you could add other blocks like <%block name="bodyextra">Overriden Body Extra!</%block>

2. In devstatck settings:

COMPREHENSIVE_THEME_DIRS: ["/edx/app/edxapp/themes"]
ENABLE_COMPREHENSIVE_THEMING: true
DEFAULT_SITE_THEME: "testtheme"

After you restart the LMS, you should be able to see "Overriddden Title!" used as the page title on the student dashboard, if the patch is working correctly.

Maybe you need delete cache:
rm -rf /tmp/mako_*
sudo service memcached restart.

Reviewers

• @felipemontoya
• @diegomillan

[felipemontoya]

This is outdated