ci: add initial GitHub Actions integration

[acuteaangle]

Hopefully prevent future regressions such as gh-63.

Closes: gh-62
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This is currently blocked by gh-63, as we need to fix the tests before we can make sure this works as intended.

[za3k]

Aww thanks, I wasn't expecting someone else to do this!

[acuteaangle]

:3
I had some semi-recent experience setting up GitHub Actions for PineFlash, so it wasn’t difficult to cut out the Rust stuff and repurpose that ^-^

[acuteaangle]

This currently only runs tests on Linux. It should probably test MacOS as well, but I’m not certain about the dependency installation process over there. I’ll try it out in a different branch and report back if I have any success.

EDIT: Update, looks good; pushing here.

[acuteaangle]

Marking this as no longer a draft so that hopefully the checks will actually attempt to run here.
Also technically not a draft, just waiting on other fixes.

I’m not sure why the checks aren’t running on this PR itself. They’re running on my branch.
In my PineFlash PR, checks definitely also ran on the CI PR itself.

Also, I need to force-push an update to the last commit, ‘linux’ is no longer accurate as a job name.

[za3k]

Unsure why it wasn't running for you. I just cherry-picked this over and it ran for me.

https://github.com/za3k/qr-backup/actions/runs/14048836380

[za3k]

Added to master as 8d40ed3 (You have been credited as "Summer Tea", let me know if you would prefer another name)

Feel free to revise to add working OS X continuous integration support, or to close this PR if you don't want to.

[acuteaangle]

I’m taking a look at the MacOS CI.

[acuteaangle]

I’m getting a core.getfont error currently.
https://github.com/acuteaangle/qr-backup/actions/runs/14050727326/job/39340482844
Not sure what’s causing it yet

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Notes so far:

1. We should use apt-get over apt, as apt is not intended to be stable for scripts
2. We should probably use the official setup-python action so we don’t get flakiness because of whatever version of Python the runner happens to have installed; also comes with pip caching and the ability to test multiple Python versions.

In my current iteration, I added a bunch of off-the-shelf caching to all the dependencies because it was taking a very long time to retry after each failure. This also abstracts away 1.

The Linux test still works, so I believe this pillow issue to be MacOS-specific.

Also, we probably shouldn’t list Python 3.6 as supported anymore in the install guide; it’s long-EOL and not even available to test in GitHub CI anymore. 3.9 is the oldest non-EOL Python version currently, and qr-backup does pass tests on Linux with 3.9

[za3k]

shouldn't list Python 3.6 as supported

from the nix packager... hmmm sus (yes this is fine, feel free to bump to 3.9)

You probably need to install the font, as listed in the install guide. Unfortunately the listed advice on how to install is "double click the font". Good luck!

Edit: That could use a better error message on our end if that's really the problem, but let's focus this PR on just CI.