pyautogui: just skip stubtest

[AlexWaygood]

I realised immediately after merging the pyautogui PR that there's not much point running stubtest on this package, since stubtest isn't able to import any of PyAutoGUI without access to a display screen

[github-actions]

According to mypy_primer, this change has no effect on the checked open source code. 🤖🎉

[JelleZijlstra]

I looked into whether we could fudge this with environment variables, but it really does need an actual display it can talk to at import time.

(Also, remind me not to try to install pyautogui on a Mac, it installs like 100 dependencies.)

[Akuli]

We could use xvfb-run if we want an actual display. I do it for the tests of my GUI programs, e.g. https://github.com/Akuli/porcupine/blob/b4e3e0a0015af661bb4974b1ab200854ce638126/.github/workflows/check.yml#L55-L57

[AlexWaygood]

We could use xvfb-run if we want an actual display. I do it for the tests of my GUI programs, e.g. https://github.com/Akuli/porcupine/blob/b4e3e0a0015af661bb4974b1ab200854ce638126/.github/workflows/check.yml#L55-L57

Interesting. Would this slow down running stubtest at all? Would there be a way of specifying in METADATA.toml whether a package needs a display, and then only using xvfb for packages that need it?

[Akuli]

It would slow starting stubtest, but only by about 300ms:

$ time xvfb-run sleep 1

real	0m1,341s
user	0m0,019s
sys	0m0,010s

Once stubtest is running, it has a DISPLAY environment variable but otherwise runs as usual.

[AlexWaygood]

Sounds great to me, in that case!

[AlexWaygood]

Could we maybe unskip stubtesting pynput as well, if we did this?

typeshed/stubs/pynput/METADATA.toml

Line 4 in 8e4b89a

skip = true # A display server (e.g. X11) is required to import pynput

[AlexWaygood]

@Akuli, could you work up a PR for this? (GitHub Actions are... not my strong suit.)

[Akuli]

Sure. I'll probably get it done during this weekend :)