uv/crates/uv-python
Zanie Blue 0dea932d83
Improve Python executable name discovery when using alternative implementations (#7649)
There are two parts to this. 

The first is a restructuring and refactoring. We had some debt around
expected executable name generation, which we address here by
consolidating into a single function that generates a combination of
names. This includes a bit of extra code around free-threaded variants
because this was written on top of #7431 — I'll rebase that on top of
this.

The second addresses some bugs around alternative implementations.
Notably, `uv python list` does not discovery executables with
alternative implementation names. Now, we properly generate all of the
executable names for `VersionRequest::Any` (originally implemented in
https://github.com/astral-sh/uv/pull/7508) to properly show all the
implementations we can find:

```
❯ cargo run -q -- python list --no-python-downloads
cpython-3.12.6-macos-aarch64-none     /opt/homebrew/opt/python@3.12/bin/python3.12 -> ../Frameworks/Python.framework/Versions/3.12/bin/python3.12
cpython-3.11.10-macos-aarch64-none    /opt/homebrew/opt/python@3.11/bin/python3.11 -> ../Frameworks/Python.framework/Versions/3.11/bin/python3.11
cpython-3.9.6-macos-aarch64-none      /Library/Developer/CommandLineTools/usr/bin/python3 -> ../../Library/Frameworks/Python3.framework/Versions/3.9/bin/python3
pypy-3.10.14-macos-aarch64-none       /opt/homebrew/bin/pypy3 -> ../Cellar/pypy3.10/7.3.17/bin/pypy3
```

While doing both of these changes, I ended up changing the priority of
interpreter discovery slightly. For example, given that the executables
are in the same directory, do we query `python` or `python3.10` first
when you request `--python 3.10`? Previously, we'd check `python3.10`
but I think that was an incorrect optimization. I think we should always
prefer the bare name (i.e. `python`) first. Similarly, this applies to
`python` and an executable for an alternative implementation like
`pypy`. If it's not compatible with the request, we'll skip it anyway.
We might have to query more interpreters with this approach but it seems
rare.


Closes https://github.com/astral-sh/uv/issues/7286 superseding
https://github.com/astral-sh/uv/pull/7508
2024-09-23 17:17:55 -05:00
..
python Block Python <3.7 not only on linux (#7266) 2024-09-10 15:15:41 -05:00
src Improve Python executable name discovery when using alternative implementations (#7649) 2024-09-23 17:17:55 -05:00
Cargo.toml Run cargo upgrade (#7448) 2024-09-17 12:39:58 +02:00
download-metadata.json Add support for managed Python 3.13 and update CPython versions (#7263) 2024-09-10 14:36:16 -05:00
fetch-download-metadata.py Add support for managed Python 3.13 and update CPython versions (#7263) 2024-09-10 14:36:16 -05:00
template-download-metadata.py Deprecate the --isolated flag (#5466) 2024-07-30 22:40:38 +00:00