## Summary
This PR gets rid of the `requirements.in` and `requirements.txt` files
in the `scripts/fuzz-parser` directory, and replaces them with
`pyproject.toml` and `uv.lock` files. The script is renamed from
`fuzz-parser` to `py-fuzzer` (since it can now also be used to fuzz
red-knot as well as the parser, following
https://github.com/astral-sh/ruff/pull/14566), and moved from the
`scripts/` directory to the `python/` directory, since it's now a
(uv)-pip-installable project in its own right.
I've been resisting this for a while, because conceptually this script
just doesn't feel "complicated" enough to me for it to be a full-blown
package. However, I think it's time to do this. Making it a proper
package has several advantages:
- It means we can run it from the project root using `uv run` without
having to activate a virtual environment and ensure that all required
dependencies are installed into that environment
- Using a `pyproject.toml` file means that we can express that the
project requires Python 3.12+ to run properly; this wasn't possible
before
- I've been running mypy on the project locally when I've been working
on it or reviewing other people's PRs; now I can put the mypy config for
the project in the `pyproject.toml` file
## Test Plan
I manually tested that all the commands detailed in
`python/py-fuzzer/README.md` work for me locally.
---------
Co-authored-by: David Peter <sharkdp@users.noreply.github.com>
## Summary
- Properly fix the race condition identified in
https://github.com/astral-sh/ruff/pull/11039. Instead of running the
version of Ruff we're testing by invoking `cargo run --release` on each
generated source file, we either (1) accept a path to an executable on
the command line or (2) if that's not specified, we run `cargo build
--release` once at the start and then invoke the executable found in
`target/release/ruff` directly.
- Now that the race condition is properly fixed, remove the workaround
for the race condition added in
https://github.com/astral-sh/ruff/pull/11039.
- Also allow users to pass in an executable to compare against for the
`--only-new-bugs` argument (previously it was hardcoded to always
compare against the version of Ruff installed into the Python
environment)
- Use `argparse.RawDescriptionHelpFormatter` as the formatter class
rather than `argparse.RawTextHelpFormatter`. This means that long help
texts for the individual arguments will be wrapped to a sensible width.
- On completion of the script, indicate success or failure of the script
overall by raising `SytemExit` with the appropriate exit code.
- Add myself as a codeowner for the script
Alex Waygood
Micha Reiser
Douglas Creager
Andrew Gallant
David Peter
Carl Meyer
Dhruv Manilawala
Charlie Marsh