iiab/roles/moodle/tasks/mathjax.yml

# 2021-07-05: Thanks to https://github.com/moodlebox/moodlebox/blob/master/roles/moodleinstall/tasks/mathjax.yml

# Verify this Moodle plugin after installation at:
# http://box.lan/moodle/admin/plugins.php
# http://box.lan/moodle/admin/settings.php?section=filtersettingmathjaxloader

- name: Download (clone) MathJax library/plugin from https://github.com/mathjax/MathJax to {{ moodle_base }}/lib/MathJax
  git:
    repo: https://github.com/mathjax/MathJax    # Or: git://github.com/mathjax/MathJax.git
    dest: "{{ moodle_base }}/lib/MathJax"       # /opt/iiab/moodle
    #version: "{{ moodle_mathjax_version }}"    # 2021-07-05: https://github.com/moodlebox/moodlebox/blob/master/default.config.yml uses 2.7.9 from 2020-08-25 -- whereas https://github.com/mathjax/MathJax/releases offers 3.2.0 from 2021-07-17
    depth: 1

- name: chown -R {{ apache_user }}:{{ apache_user }} {{ moodle_base }}/lib/MathJax
  file:
    path: "{{ moodle_base }}/lib/MathJax"
    owner: "{{ apache_user }}"    # www-data
    group: "{{ apache_user }}"    # MoodleBox uses {{ moodlebox_username }} set to 'moodlebox' in https://github.com/moodlebox/moodlebox/blob/master/default.config.yml
    #mode: ug+w,o-w               # 2021-07-05: Let's stick with Moodle's default (755 dirs & 644 files), as we do in moodle/tasks/install.yml
    recurse: yes

# SEE https://github.com/moodle/moodle/blob/master/filter/mathjaxloader/lang/en/filter_mathjaxloader.php
- name: Run {{ moodle_base }}/admin/cli/cfg.php --component=filter_mathjaxloader to change MathJax library/plugin URL
  command: >
    /usr/bin/php {{ moodle_base }}/admin/cli/cfg.php --component=filter_mathjaxloader --name=httpsurl --set=/lib/MathJax/MathJax.js
  register: mathjax_url_result
  changed_when: mathjax_url_result.rc == 0