Install svn on unbutu for github workflows

[notatallshaw]

No description provided.

[ichard26]

I don't understand why CI is blowing on Ubuntu 24.04 with PEP 668 errors. Is the virtual environment sitecustomize functionality somehow broken...? I'm on an Ubuntu 24.04 install myself and the test suite is passing...

[notatallshaw]

Perhaps there is a difference between where the tests set up the externally managed file and where it should set up on the 24.04 runner?

I don't have time to look right now, if it's non obvious we could always pin the previous runner.

[notatallshaw]

So, for at least one of the tests, the virtual environment created seems to be refusing to do user installs:

ERROR: Can not perform a '--user' install. User site-packages are not visible in this virtualenv

Where as the test is expecting it to refuse to do an externally managed install.

I don't know why this started on Ubuntu 24.04, perhaps they've patched venv to different default settings?

It's perhaps possible to change the values in pyenv.cfg to allow user installs and show that under this circumstance externally managed will still block installs, which I think expresses the intent of this test. Or if venv is patched in such a way this isn't possible, also accept that error message for user installs?