Add ruff configuration and run ruff in pre-commit

.github/workflows/pre-commit.yml

@@ -17,6 +17,10 @@ jobs:
           source /root/pre-commit-venv/bin/activate
           pip install pre-commit
           export PYTHONPATH=$VIRTUAL_ENV/lib/python3.$(python3 -c 'import sys; print(f"{sys.version_info[1]}")')/site-packages:$PYTHONPATH
+          # Newer versions of git are more cautious around the github runner
+          # environment and without this git rev-parse --show-cdup in pre-commit
+          # fails
+          git config --global --add safe.directory $(pwd)
           pre-commit run --show-diff-on-failure \
             --color=always \
             --all-files

.pre-commit-config.yaml

@@ -3,3 +3,10 @@ repos:
     rev: v4.5.0
     hooks:
       - id: check-xml
+  - repo: local
+    hooks:
+      - id: ruff-format
+        name: ruff-format
+        entry: ruff format --force-exclude
+        types: [python]
+        language: system

.ruff.toml

@@ -0,0 +1,10 @@
+target-version = "py311"
+
+line-length = 99
+
+[format]
+# Make things format the same way as black
+quote-style = "double"
+indent-style = "space"
+skip-magic-trailing-comma = false
+line-ending = "auto"