Debug Cirrus CI testing

[joerick]

Fix the build on main.

Disables iOS testing on Cirrus.

Cirrus has a problem running the simulator, see a recent build on main, for example:

https://cirrus-ci.com/task/6394806932340736?logs=run_cibuildwheel_tests#L1832

I've removed the support tick from cirrus in the readme too, until/unless we can figure this out.

cc @freakboy3742

Fixes a bug with the GraalPy build

Sometimes vsdevcmd can print an error to console while it works. This messed up the environment JSON blob, so it's saved to a file instead.

[freakboy3742]

AFAICT, this is a manifestation of python/cpython#133131 - Xcode removed the iPhone SE simulator from the default set when they released Xcode 16.3, in favor of the newly released "iPhone 16e". As a result, the default simulator picked by the iOS testbed runner no longer exists.

This has been fixed upstream, and the patch will be rolled into the next release of the iOS binary support package. I was planning to cut an update once 3.14 beta 2 is released (which is due in a day or two).

[henryiii]

Beta 2 is out now! Also waiting on @mayut to trigger manylinux.

[freakboy3742]

Beta 2 is out now! Also waiting on @mayut to trigger manylinux.

ACK - still trying to dig my way out of my Pycon US backlog. Will cut a new release as soon as I surface :-)

[joerick]

I think you meant @mayeut above!

[joerick]

Whomp whomp, ran out of cirrus credits. I'm pretty sure i figured out what was wrong, vsdevcmd was outputting an error message that was corrupting the JSON stream. I'll tidy this up.

[joerick]

This is in fact, ready, the Cirrus CI failures are due to lack of credits.

[Copilot]

Pull Request Overview

This PR fixes CI test failures by disabling iOS testing on Cirrus CI, streamlines skip logic in the iOS tests, and improves the GraalPy environment capture process on Windows. It also updates the README to reflect Cirrus CI's unsupported iOS testing status.

• Centralize and apply skip_if_ios_testing_not_supported in test/test_ios.py
• Change GraalPy setup to write environment JSON to a file in cibuildwheel/platforms/windows.py
• Remove Cirrus CI iOS support indicator in README.md

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
test/test_ios.py	Added skip_if_ios_testing_not_supported helper and replaced inline skips, disabling iOS tests on Cirrus CI
cibuildwheel/platforms/windows.py	Capture GraalPy environment via a temporary JSON file instead of check_output
README.md	Cleared the Cirrus CI support tick to indicate unsupported iOS testing