Warn when --platform resolves fail tag checks.#2533
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jsirois merged 2 commits intopex-tool:mainfrom Sep 17, 2024
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The addition of wheel tag compatibility to the resolve chech adding in pex-tool#2512 regressed users of abbreviated `--platform` in some cases by failing PEX builds that would otherwise succeed and, later, actually work at runtime. Keep the spirit of pex-tool#2512 by emitting a detailed warning at build time with remediation steps instead of failing the build outright. Fixes pex-tool#2532
jsirois
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Sep 16, 2024
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| PEXWarning: The resolved distributions for 1 target may not be compatible: | ||
| 1: abbreviated platform cp311-cp311-manylinux_2_28_x86_64 may not be compatible with: | ||
| cryptography 42.0.8 requires cffi>=1.12; platform_python_implementation != "PyPy" but 2 incompatible dists were resolved: | ||
| cffi-1.16.0-cp311-cp311-manylinux_2_17_x86_64.manylinux2014_x86_64.whl | ||
| cffi-1.16.0-cp311-cp311-linux_x86_64.whl | ||
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| Its generally advisable to use `--complete-platform` instead of `--platform` to | ||
| ensure resolved distributions will be compatible with the target platform at | ||
| runtime. For instructions on how to generate a `--complete-platform` see: | ||
| https://docs.pex-tool.org/buildingpex.html#complete-platform |
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@cburroughs added you FYI. Avoid Pex 2.19.0 as a |
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Thanks for the alert. FYI, although I imagine it doesn't particularly change anything on the Pex side: Pants almost doesn't use it any more, as the last use on |
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Yeah, I did that research here: pantsbuild/pants#21425 (comment) |
jsirois
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Dec 2, 2024
Previously, when speculatively building a wheel from an sdist for a foreign platform target, the wheel tags needed to match the foreign platform target's tags exactly in all cases. For `--complete-platform` this makes sense, we have complete information about the foreign platform target's tags, but for an abbreviated `--platform` it does not since we have abbreviated information that is not enough to know a tag mismatch definitively signals the wheel will never work on the foreign platform target. Now only those definitive cases (e.g.: the speculative wheel is Linux but the foreign abbreviated platform is macOS) are rejected. This will let some eventually failing wheels though, but the warning added in #2533 already covers this risk.
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The addition of a wheel tag compatibility check to the overall
post-resolve check in #2512 regressed users of abbreviated
--platformin some cases by failing PEX builds that would otherwise succeed and,
later, actually work at runtime. Keep the spirit of #2512 by emitting a
detailed warning at build time with remediation steps instead of failing
the build outright.
Fixes #2532