Editing language files and permissions on the languages/ dir

[hyanwong]

@lentinj wrote in #778 (comment)

We should probably chown all the OZtree/languages/* files to www when we run grunt?
No, we should be disabling the language re-generation, and putting it behind another config option. It only serves to slow beta down, and having python-writable python files which are executed on each request is an obvious chink in our armour. We also set ourselves up for merge conflicts.

Previously we have allowed logged-in users with certain privileges to edit the language files. I think that's useful, but I agree that we should probably lock down the "auto-create" option for anonymous visitors. I'm not sure we do this, though?

[lentinj]

We don't, and that's definitely worth adding:

OZtree/models/db.py

Lines 44 to 45 in 0e513c9

	# Allow translators to add new languages e.g. on the test (beta) site, but not on prod
	T.is_writable = is_testing

Agreed, being able to use the translation machinery we get for free is a good thing. I'm still somewhat nervous about languages being writable by default in an installation though.

Maybe is_writable = is_testing and logged_in and languages_directory_writable, and we ~manually tweak the permissions for beta?

[hyanwong]

Ah yes, I think we only allowed editing of languages on beta, now I come to think of it. This seems like a good compromise.