refactor: Switch to ruff for formatting.

.libcst.codemod.yaml

@@ -6,7 +6,7 @@ generated_code_marker: '@generated_module'
 # Command line and arguments for invoking a code formatter. Anything
 # specified here must be capable of taking code via stdin and returning
 # formatted code via stdout.
-formatter: ['black', '-q' , '-']
+formatter: ['ruff', 'format' , '-']
 # List of regex patterns which LibCST will evaluate against filenames to
 # determine if the module should be touched.
 blacklist_patterns: []

.pre-commit-config.yaml

@@ -37,14 +37,9 @@ repos:
         exclude_types: [json, pofile]
         exclude: 'changelog/|py.typed|disnake/bin/COPYING|.github/PULL_REQUEST_TEMPLATE.md|.github/CODEOWNERS|LICENSE|MANIFEST.in'
 
-  - repo: https://github.com/psf/black-pre-commit-mirror
-    rev: 23.9.1
-    hooks:
-      - id: black
-        name: "run black in all files"
-
   - repo: https://github.com/charliermarsh/ruff-pre-commit
     rev: v0.3.4
     hooks:
       - id: ruff
         args: [--fix, --fixable=I]
+      - id: ruff-format

CONTRIBUTING.md

@@ -70,7 +70,7 @@ Once PDM is installed, use the following command to initialize a virtual environ
 $ pdm run setup_env
 ```
 
-Other tools used in this project include [black](https://black.readthedocs.io/en/stable/) (formatter), [ruff](https://beta.ruff.rs/docs/) (linter), and [pyright](https://microsoft.github.io/pyright/#/) (type-checker). For the most part, these automatically run on every commit with no additional action required - see below for details.
+Other tools used in this project include [ruff](https://beta.ruff.rs/docs/) (linter and formatter), and [pyright](https://microsoft.github.io/pyright/#/) (type-checker). For the most part, these automatically run on every commit with no additional action required - see below for details.
 
 All of the following checks also automatically run for every PR on GitHub, so don't worry if you're not sure whether you missed anything. A PR cannot be merged as long as there are any failing checks.
 

pyproject.toml

@@ -80,7 +80,7 @@ changelog = [
 codemod = [
     # run codemods on the respository (mostly automated typing)
     "libcst~=1.1.0",
-    "black==23.9.1",
+    "ruff==0.3.4",
     "autotyping==23.2.0",
 ]
 typing = [
@@ -104,7 +104,6 @@ build = [
 ]
 
 [tool.pdm.scripts]
-black = { composite = ["lint black"], help = "Run black" }
 docs = { cmd = "nox -Rs docs --", help = "Build the documentation for development" }
 lint = { cmd = "nox -Rs lint --", help = "Check all files for linting errors" }
 pyright = { cmd = "nox -Rs pyright --", help = "Run pyright" }
@@ -114,7 +113,6 @@ test = { cmd = "nox -Rs test --", help = "Run pytest" }
 
 # legacy tasks for those who still type `task`
 [tool.taskipy.tasks]
-black = { cmd = "black", help = "Run black" }
 docs = { cmd = "docs", help = "Build the documentation for development" }
 lint = { cmd = "lint", help = "Check all files for linting errors" }
 pyright = { cmd = "pyright", help = "Run pyright" }
@@ -124,10 +122,6 @@ test = { cmd = "test", help = "Run pytest" }
 [tool.taskipy.settings]
 runner = "pdm run"
 
-[tool.black]
-line-length = 100
-target-version = ["py38", "py39", "py310", "py311", "py312"]
-
 [tool.ruff]
 line-length = 100
 target-version = "py38"