robotpajamas.pants.pyrefly 0.0.1

A Pants plugin adding support for the Pyrefly type checker.

pants-pyrefly-plugin

This plugin provides a Pants check backend using Pyrefly - the new Python type checker from Facebook.

Installation

This plugin was tested on Python 3.11 and Pants 2.31.0.dev3.

Add the following to your pants.toml file:

[GLOBAL]
plugins = [
    ...
    "robotpajamas.pants.pyrefly",
]

...

backend_packages = [
    ...
    "experimental.pyrefly",
]

Usage

This plugin is even more beta than Pyrefly itself. It's largely just a copy/paste/rename of the Ty plugin, so your mileage may vary.

pants check --only=pyrefly src/foo/bar.py

The hard part of adding a new linter or formatter isn't usually the code itself, it's how to untangle the mess of configurations for the tool and weave them into various Pants-isms (e.g. configurations, interpreter constraints, partitions, environment variables, reasonable defaults, escape hatches, etc...).