uv/crates/uv-build
Charlie Marsh f7f6453287
Communicate PEP 517 hook results via files (#2314)
## Summary

In #1813, we were failing to install `scikit-image==0.19.3` from source
in Python 3.11. Confusingly, though, the trace showed that the build
command exited with status 0...

The issue is that we get results from the PEP 517 hooks by reading from
`stdout` -- that is, we `print` at the end of the script, and parse the
printed output on the other side.

It turns out that for `scikit-image`, in this case, there was output
_after_ the wheel filename:

```
...
no previously-included directories found matching 'doc/gh-pages'
adding license file 'LICENSE.txt'
writing manifest file 'scikit_image.egg-info/SOURCES.txt'
Copying scikit_image.egg-info to build/bdist.macosx-12.6-arm64/wheel/scikit_image-0.19.3-py3.11.egg-info
running install_scripts
scikit_image-0.19.3-cp311-cp311-macosx_14_0_arm64.whl
INFO:
########### EXT COMPILER OPTIMIZATION ###########
INFO: Platform      :
  Architecture: aarch64
  Compiler    : clang

CPU baseline  :
  Requested   : 'min'
  Enabled     : NEON NEON_FP16 NEON_VFPV4 ASIMD
  Flags       : none
  Extra checks: none

CPU dispatch  :
  Requested   : 'max -xop -fma4'
  Enabled     : ASIMDHP ASIMDDP ASIMDFHM
  Generated   : none
INFO: CCompilerOpt.cache_flush[864] : write cache to path -> /private/var/folders/nt/6gf2v7_s3k13zq_t3944rwz40000gn/T/.tmp5ZPIbv/built-wheels-v0/pypi/scikit-image/0.19.3/hLW_f7wWeGDOPRlSazQXw/scikit-image-0.19.3.tar.gz/build/temp.macosx-12.6-arm64-3.11/ccompiler_opt_cache_ext.py
```

We need the `scikit_image-0.19.3-cp311-cp311-macosx_14_0_arm64.whl`
line, but we were failing to find it due to all the extra output at the
end (presumedly, some kind of `atexit` logging).

This PR modifies the hooks to instead write their results to files that
are passed in by the parent. On the other end, we then read the results
back from disk. This makes it much more robust to "other" output in the
script.

Closes https://github.com/astral-sh/uv/issues/1813.

## Test Plan

Ran `cargo run pip install scikit-image==0.19.3 --reinstall
--no-cache-dir` on Python 3.11.
2024-03-09 06:49:57 -05:00
..
src Communicate PEP 517 hook results via files (#2314) 2024-03-09 06:49:57 -05:00
.gitignore Rename to uv (#1302) 2024-02-15 11:19:46 -06:00
Cargo.toml Move source distribution unpacking out of build (#2294) 2024-03-08 03:40:11 +00:00