feat: Replace ppa/deadsnakes with uv

[peterdragun]

Description

Deadsnake repository stopped supporting Ubuntu 20.04 (see deadsnakes/issues#251), which is required because of the GLIBC version (see espressif/esptool#1100). So this MR is fixing the issue with building the esptool by replacing the deadsnakes with uv. I have also replaced all pip calls with uv, which seems to speed up the process quite a bit.

I have also noticed that sometimes during apt-get update -y there is an interactive prompt for time zone info - I have disabled this by setting the noninteractive mode and timezone to UTC.

Failed job: https://github.com/espressif/esptool/actions/runs/18274789103/job/52027147066
Tested in: https://github.com/peterdragun/esptool/actions/runs/18279077745

Related

No related issues

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[Copilot]

Pull Request Overview

This PR addresses the issue where the deadsnakes PPA repository no longer supports Ubuntu 20.04 (required for GLIBC compatibility) by replacing it with pyenv for Python installation. The change ensures continued compatibility with the required Ubuntu version while maintaining the same functionality.

Key changes:

• Replace deadsnakes PPA with pyenv for Python installation
• Add environment variables to prevent interactive prompts during apt-get operations
• Update Python executable references from versioned to generic python command

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[dobairoland]

LGTM with one suggestion. uv replaces many tools and is much faster. I think projects like this offer a good chance to experiment with such tools.

This can be merged as is.

[radimkarnis]

LGTM, thanks!

[peterdragun]

Hi @dobairoland thank you for the recommendation to use uv, seems much better than pyenv in terms of performance. We got to roughly the same performance as before! I have updated the code to use the uv everywhere (it took me a couple of iterations to make it work 😅, but I think it was worth it!). Test results have also been updated. Please take a look.

BTW, should I also bump the default Python version to 3.14? What do you think?

[dobairoland]

LGTM.

BTW, should I also bump the default Python version to 3.14? What do you think?

I think can we can wait with that for the next time when there will already be some bugfix releases for it.

[radimkarnis]

uv solution LGTM as well.