ci: test Python 3.13 and 3.14.0-alpha - 3.14

[JohnVillalovos]

Also stop testing Python 3.8 as it is End-of-Life as of 2024-10-07. https://devguide.python.org/versions/

[tomchristie]

Okay, shall we see about getting these passing?
The behaviour change is identified in #995

One resolution here would be to change this line...

httpcore/httpcore/__init__.py

Line 138 in a173552

for __name in __all__:

To add an exclusion for SOCKET_OPTION.

[JohnVillalovos]

Okay, shall we see about getting these passing? The behaviour change is identified in #995

One resolution here would be to change this line...

httpcore/httpcore/__init__.py

Line 138 in a173552

for __name in __all__:

To add an exclusion for SOCKET_OPTION.

First will likely need #999 or something similar merged to get the other parts of the CI to pass.

[hugovk]

We can simplify this (allow-prereleases: true is set below):

Suggested change

	python-version: ["3.9", "3.10", "3.11", "3.12", "3.13", "3.14.0-alpha - 3.14"]
	python-version: ["3.9", "3.10", "3.11", "3.12", "3.13", "3.14"]

[hugovk]

The next failure in the yak stack can be fixed by setting the PYO3_USE_ABI3_FORWARD_COMPATIBILITY: 1 env var to allow PYO3 to run on Python 3.14 pre-releases, for example:

• hugovk@6ef3247
• https://github.com/hugovk/httpcore/actions/runs/14191922956/job/39758340950

(FORCE_COLOR: 1 is optional and adds colour to the CI output, which makes errors easier to find in long logs.)

Then the next failure is because it's trying to build Pillow (a dependency of a dependency) from source because doesn't have wheels yet for 3.14, and most likely they'll be available in the 1st July release (the first one after beta):

The headers or library files could not be found for jpeg,
a required dependency when compiling Pillow from source.

• https://github.com/hugovk/httpcore/actions/runs/14191922956/job/39758340950

This can be worked around by temporarily installing libjpeg8-dev, something like this (it could be restricted to just the 3.14 build):

• hugovk@bd7d194

Pillow then builds:

• https://github.com/hugovk/httpcore/actions/runs/14194081780/job/39765107948

And that gets us to the typing.Union failure from:

• Python 3.14 incompatibility related to some typing objects being immutable #995

[tomchristie]

@hugovk Rather than resolve those weirdly specific alpha buglettes, I'd suggest we drop the "benchmarking requirements" as suggested in #964. They're breaking our builds.

(Let's de-yak the stack, please & thanks)

[hugovk]

Good idea, there's an approved PR for that issue awaiting merge: #965.