Re: [PATCH] ci: fix Python dependency on Ubuntu 24.04

On 24/05/06 07:35AM, Patrick Steinhardt wrote:

Newer versions of Ubuntu have dropped Python 2 starting with Ubuntu
23.04. By default though, our CI setups will try to use that Python
version on all Ubuntu-based jobs except for the "linux-gcc" one.

We didn't notice this issue due to two reasons:

  - The "ubuntu:latest" tag always points to the latest LTS release.
    Until a few weeks ago this was Ubuntu 22.04, which still had Python
    2.

  - Our Docker-based CI jobs had their own script to install
    dependencies until 9cdeb34b96 (ci: merge scripts which install
    dependencies, 2024-04-12), where we didn't even try to install
    Python at all for many of them.

Since the CI refactorings have originally been implemented, Ubuntu
24.04 was released, and it being an LTS versions means that the "latest"
tag now points to that Python-2-less version. Consequently, those jobs
that use "ubuntu:latest" broke.

Address this by using Python 2 on Ubuntu 20.04, only, whereas we use
Python 3 on all other Ubuntu jobs. Eventually, we should think about
dropping support for Python 2 completely.

Reported-by: Justin Tobler <redacted>

Not a big deal, but the email is slightly off. Should be:
[off-list ref]

Otherwise this patch looks good to me. :)

-Justin 

Signed-off-by: Patrick Steinhardt <redacted>

...