The architecture of uv does not necessarily match that of the python interpreter (#2326). In cross compiling/testing scenarios the operating system can also mismatch. To solve this, we move arch and os detection to python, vendoring the relevant pypa/packaging code, preventing mismatches between what the python interpreter was compiled for and what uv was compiled for. To make the scripts more manageable, they are now a directory in a tempdir and we run them with `python -m` . I've simplified the pypa/packaging code since we're still building the tags in rust. A `Platform` is now instantiated by querying the python interpreter for its platform. The pypa/packaging files are copied verbatim for easier updates except a `lru_cache()` python 3.7 backport. Error handling is done by a `"result": "success|error"` field that allow passing error details to rust: ```console $ uv venv --no-cache × Can't use Python at `/home/konsti/projects/uv/.venv/bin/python3` ╰─▶ Unknown operation system `linux` ``` I've used the [maturin sysconfig collection](https://github.com/PyO3/maturin/tree/855f6d2cb1fb8fb43c2bb9e500ab0e5e84bd3140/sysconfig) as reference. I'm unsure how to test these changes across the wide variety of platforms. Fixes #2326
Crates
bench
Functionality for benchmarking uv.
cache-key
Generic functionality for caching paths, URLs, and other resources across platforms.
distribution-filename
Parse built distribution (wheel) and source distribution (sdist) filenames to extract structured metadata.
distribution-types
Abstractions for representing built distributions (wheels) and source distributions (sdists), and the sources from which they can be downloaded.
install-wheel-rs
Install built distributions (wheels) into a virtual environment.]
once-map
A waitmap-like concurrent hash map for executing tasks
exactly once.
pep440-rs
Utilities for interacting with Python version numbers and specifiers.
pep508-rs
Utilities for interacting with PEP 508 dependency specifiers.
platform-host
Functionality for detecting the current platform (operating system, architecture, etc.).
platform-tags
Functionality for parsing and inferring Python platform tags as per PEP 425.
uv
Command-line interface for the uv package manager.
uv-build
A PEP 517-compatible build frontend for uv.
uv-cache
Functionality for caching Python packages and associated metadata.
uv-client
Client for interacting with PyPI-compatible HTTP APIs.
uv-dev
Development utilities for uv.
uv-dispatch
A centralized struct for resolving and building source distributions in isolated environments.
Implements the traits defined in uv-traits.
uv-distribution
Client for interacting with built distributions (wheels) and source distributions (sdists). Capable of fetching metadata, distribution contents, etc.
uv-extract
Utilities for extracting files from archives.
uv-fs
Utilities for interacting with the filesystem.
uv-git
Functionality for interacting with Git repositories.
uv-installer
Functionality for installing Python packages into a virtual environment.
uv-interpreter
Functionality for detecting and leveraging the current Python interpreter.
uv-normalize
Normalize package and extra names as per Python specifications.
uv-package
Types and functionality for working with Python packages, e.g., parsing wheel files.
uv-resolver
Functionality for resolving Python packages and their dependencies.
uv-traits
Shared traits for uv, to avoid circular dependencies.
pypi-types
General-purpose type definitions for types used in PyPI-compatible APIs.
uv-virtualenv
A venv replacement to create virtual environments in Rust.
uv-warnings
User-facing warnings for uv.
requirements-txt
Functionality for parsing requirements.txt files.