nextcloud: update to 16.0.0

[kyrofa]

This PR resolves #972 by updating Nextcloud to the latest v16 release.

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Note that this PR gets the groundwork of upgrading out of the way and gives us something to test, but we'll continue our tradition of not upgrading everyone until the first point release (16.0.1). Please use the 16/candidate channel if you want to upgrade to 16.0.0 now.

[kyrofa]

Only issue I've discovered so far (which I discovered in RC2) is not a blocking bug: nextcloud/server#15236 .

[kyrofa]

Hmm... something is too old on the Trusty runners used by CircleCI for these tests to pass (they pass locally on Bionic). I suspect it's just webkit-related. Trying to figure that out, probably will need to move to a modern JS interpreter.

[omyno]

Hmm... something is too old on the Trusty runners used by CircleCI for these tests to pass (they pass locally on Bionic).

Is there a reason not to specify bionic in .circleci/config.yml?

[kyrofa]

Is there a reason not to specify bionic in .circleci/config.yml?

I'd love to, but the docs lead me to believe such a thing is impossible with the machine executor. I've asked the question, though.

[omyno]

Thanks for the reply. It's irritating that they still rely on 14.04 as the default. Apparently you can also use image: ubuntu-1604:201903-01, which in turn uses

Ubuntu 16.04, docker 18.09.3, docker-compose 1.23.1

Might be worth a try.

[kyrofa]

Wait, how did I miss that?! Thanks @omyno, I'll give that a shot now.

[kyrofa]

Ah, it seems these tests don't pass in Xenial either. Also, the Xenial image on CircleCI is busted. I'll continue trying to move to chrome headless.

[kyrofa]

Alright, got things sorted by moving the tests to chrome.

[kyrofa]

I have extracted the test changes from this PR into #977 so it can land before this, which will unblock the failing daily tests against upstream Nextcloud's master and allow us to setup daily tests against v16 as well.