Moodle 5 compatibility

[EJMFarrow]

Looks like Moodle 5 will in many ways make things simpler. All question categories will be in a module context with courses having (possibly multiple) question bank modules. This will require some (but not necessarily vast) rework. We'll need to make some design/scope choices, though, and think about how we want to go about supporting Moodle 4 and 5 simultaneously.

Things to consider:

• Reducing the number of command line argument parameters e.g. createrepo will always be at module level.
• Scrap using the course/module names option?
• 'Whole course' scripts will potentially need to deal with multiple course contexts. Do we try to cope? This gets particularly gnarly if a quiz pulls from more than 2 contexts.
• Do we need a separate whole course option which gets all the contexts but not the quizzes?
• What does the directory structure look like for a whole course? (Will the same set up as currently work, with the context directories all being siblings of the quizzes.)
• Are there any places in the code where a module is expected to be a quiz? Or similar? (e.g. Does the whole course script expect a course level manifest?)
• Do we need separate dev/release branches for Moodle 4 and Moodle 5 versions of Gitsync?
• What happens when exporting from 4 and importing to 5?