Split Pex .whl into two .whls.
#3057
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We now pulish two wheels: 1. `pex-<rev>.py27.py35.py36.py37.py38.py39.py310.py311-none-any.whl`: Targets exactly the Pythons in the python tag. 2. `pex-<rev>.py3.py312-none-any.whl`: Targets Python>=3.12. The 1st wheel carries the same contents as the existing `pex-<rev>.py2.py3.py312-none-any.whl` wheel and the 2nd wheel (`pex-<rev>.py3.py312-none-any.whl`) ships without vendored `pip`, `setuptools`, `toml` or `tomli` since these are either unusable or un-needed under Python>=3.12. Fixes pex-tool#2785.
Importantly, Pex without vendored Pip can now materialize vendored Pip from its VCS requirement.
Also apply package command CI timeout fix in a test that packages the Pex PEX scie.
This need not rely on a ranked tag.
An incidental bug noticed stress testing Pex split `.whl`s.
The one potentially tricky case in the split `.whl` regime is bootstrapping what would normally be vendored Pip to satisfy older `--python`s and / or explicitly requested `--pip-version vendored`.
This was referenced Jan 1, 2026
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We now publish two wheels:
pex-<rev>.py27.py35.py36.py37.py38.py39.py310.py311-none-any.whl:Targets exactly the Pythons in the python tag.
pex-<rev>.py3.py312-none-any.whl: Targets Python>=3.12.The 1st wheel carries the same contents as the existing
pex-<rev>.py2.py3-none-any.whlwheel and the 2nd wheel(
pex-<rev>.py3.py312-none-any.whl) ships without vendoredpip,setuptools,tomlortomlisince these are either unusable orun-needed under Python>=3.12.
Fixes #1526
Fixes #1527
Fixes #1528
Fixes #1877
Fixes #2731
Fixes #2785