## Summary
PythonDownloadKey (cpython-3.13.0rc3-darwin-aarch64-none) and
PlatformTriple in `fetch-download-metadata.py` have a slight
inconsistency in the ordering of `os` and `arch`. In PythonDownloadKey,
`os` precedes `arch`, while in PlatformTriple, `arch` comes before
`platform` (equivalent to os). This difference in ordering affects the
sorting logic, giving arch higher priority than platform in the
`download-metadata.json` file, leading to a little bit of unexpected
order of entries.
Before:
<img width="676" alt="image"
src="https://github.com/user-attachments/assets/adb24a2e-da70-4a09-a702-4b5d71600b2c">
After:
<img width="725" alt="image"
src="https://github.com/user-attachments/assets/c6c76e6a-d3fd-43dc-bfb0-b3a4a3fe2b6b">
## Summary
Resolves#4834
## Test Plan
```sh
# 3.12.3 is a `install_only` archive
$ cargo run -- python install --preview --force 3.12.3
# 3.9.4 has only `full` archive
$ cargo run -- python install --preview --force 3.9.4
```
Fix#4774.
## Summary
Change the python interpreter for linux installed with `uv python` to an
optimized one.
## Test Plan
I ran the following command on Linux (glibc) to confirm that an
optimized (not debug built) Python is installed.
```bash
# install python
uv python install 3.12.3
# check build type
uv run python -c "import sysconfig;print(sysconfig.get_config_var('Py_DEBUG'))"
0
```
Whew this is a lot.
The user-facing changes are:
- `uv toolchain` to `uv python` e.g. `uv python find`, `uv python
install`, ...
- `UV_TOOLCHAIN_DIR` to` UV_PYTHON_INSTALL_DIR`
- `<UV_STATE_DIR>/toolchains` to `<UV_STATE_DIR>/python` (with
[automatic
migration](https://github.com/astral-sh/uv/pull/4735/files#r1663029330))
- User-facing messages no longer refer to toolchains, instead using
"Python", "Python versions" or "Python installations"
The internal changes are:
- `uv-toolchain` crate to `uv-python`
- `Toolchain` no longer referenced in type names
- Dropped unused `SystemPython` type (previously replaced)
- Clarified the type names for "managed Python installations"
- (more little things)
