chore(dev): switch from black to ruff format

One tool fewer to install and maintain.

Author: scop

.dir-locals.el

@@ -2,7 +2,7 @@
 ;;; For more information see (info "(emacs) Directory Variables")
 
 ((python-mode
-  (eval add-hook 'before-save-hook 'blacken-buffer nil t))
+  (mode . ruff-format-on-save))
  (sh-mode
   (mode . shfmt-on-save)
   (shfmt-arguments "-s")

.github/renovate.json

@@ -39,11 +39,6 @@
       "commitMessageTopic": "{{depName}}",
       "semanticCommitScope": "pre-commit"
     },
-    {
-      "matchPackagePatterns": ["(^|/)black(-pre-commit-mirror)?$"],
-      "versioning": "pep440",
-      "groupName": "black"
-    },
     {
       "matchPackagePatterns": ["(^|/)gitlint$"],
       "versioning": "pep440",

.pre-commit-config.yaml

@@ -49,11 +49,7 @@ repos:
         types: [text]
         files: ^(helpers/python|.+\.py)$
         exclude: ^completions/
-
-  - repo: https://github.com/psf/black-pre-commit-mirror
-    rev: 23.1.0
-    hooks:
-      - id: black
+      - id: ruff-format
         types: [text]
         files: ^(helpers/python|.+\.py)$
         exclude: ^completions/

doc/testing.md

@@ -11,9 +11,8 @@ and [pexpect](https://pexpect.readthedocs.io/).
 
 ## Coding style
 
-For the Python part, all of it is formatted using
-[Black](https://github.com/psf/black), and we also run
-[Ruff](https://github.com/charliermarsh/ruff) on it.
+For the Python part, all of it is checked and formatted using
+[Ruff](https://docs.astral.sh/ruff/).
 
 ## Installing dependencies
 

pyproject.toml

@@ -1,15 +1,25 @@
-[tool.black]
-line-length = 79
-target-version = ["py36", "py37", "py38", "py39", "py310"]
-
 [tool.ruff]
 line-length = 79
 target-version = "py37"
 select = ["E", "F", "B"]
 ignore = [
-    "E50", # Black
-    "E70", # Black
-
+    # https://docs.astral.sh/ruff/formatter/#conflicting-lint-rules
+    # (keep order of ignores here same as ^there for maintainability)
+    "W191",
+    "E111",
+    "E114",
+    "E117",
+    "D206",
+    "D300",
+    "Q000",
+    "Q001",
+    "Q002",
+    "Q003",
+    "COM812",
+    "COM819",
+    "ISC001",
+    "ISC002",
+    "E501",
 ]
 fix = true
 

test/requirements-dev.txt

@@ -2,6 +2,5 @@
 
 -r requirements.txt
 
-black==23.1.0
 mypy==1.2.0
 ruff==0.1.6