ci!: Add ruff, replacing isort, black, flake8 and its plugins

See also:
- https://ruff.rs/
- https://beta.ruff.rs/
- https://github.com/charliermarsh/ruff

.github/workflows/tests.yml

@@ -25,16 +25,16 @@ jobs:
 
       - name: Install dependencies
         run: |
-          poetry install -E "docs test coverage lint format"
+          poetry install -E "docs test coverage lint"
           poetry run pip install docutils~=${{ matrix.docutils-version }}
 
       - name: Print python versions
         run: |
           python -V
           poetry run python -V
 
-      - name: Lint with flake8
-        run: poetry run flake8
+      - name: Lint with ruff
+        run: poetry run ruff .
 
       - name: Lint with mypy
         run: poetry run mypy .

Makefile

@@ -12,12 +12,6 @@ entr_warn:
 	@echo "See https://eradman.com/entrproject/                      " 
 	@echo "----------------------------------------------------------"
 
-isort:
-	poetry run isort `${PY_FILES}`
-
-black:
-	poetry run black `${PY_FILES}`
-
 test:
 	poetry run py.test $(test)
 
@@ -36,11 +30,11 @@ start_docs:
 design_docs:
 	$(MAKE) -C docs design
 
-flake8:
-	flake8
+ruff:
+	ruff .
 
-watch_flake8:
-	if command -v entr > /dev/null; then ${PY_FILES} | entr -c $(MAKE) flake8; else $(MAKE) flake8 entr_warn; fi
+watch_ruff:
+	if command -v entr > /dev/null; then ${PY_FILES} | entr -c $(MAKE) ruff; else $(MAKE) ruff entr_warn; fi
 
 mypy:
 	poetry run mypy `${PY_FILES}`

docs/developing.md

@@ -48,11 +48,96 @@ Rebuild docs and run server via one terminal: `make dev_docs` (requires above, a
 
 ## Formatting / Linting
 
-The project uses [black] and [isort] (one after the other) and runs [flake8] via
-CI. See the configuration in `pyproject.toml` and `setup.cfg`:
+### ruff
 
-`make black isort`: Run `black` first, then `isort` to handle import nuances
-`make flake8`, to watch (requires `entr(1)`): `make watch_flake8`
+The project uses [ruff] to handles formatting, sorting imports and linting.
+
+````{tab} Command
+
+poetry:
+
+```console
+$ poetry run ruff
+```
+
+If you setup manually:
+
+```console
+$ ruff .
+```
+
+````
+
+````{tab} make
+
+```console
+$ make ruff
+```
+
+````
+
+````{tab} Watch
+
+```console
+$ make watch_ruff
+```
+
+requires [`entr(1)`].
+
+````
+
+````{tab} Fix files
+
+poetry:
+
+```console
+$ poetry run ruff . --fix
+```
+
+If you setup manually:
+
+```console
+$ ruff . --fix
+```
+
+````
+
+### mypy
+
+[mypy] is used for static type checking.
+
+````{tab} Command
+
+poetry:
+
+```console
+$ poetry run mypy .
+```
+
+If you setup manually:
+
+```console
+$ mypy .
+```
+
+````
+
+````{tab} make
+
+```console
+$ make mypy
+```
+
+````
+
+````{tab} Watch
+
+```console
+$ make watch_mypy
+```
+
+requires [`entr(1)`].
+````
 
 ## Releasing
 
@@ -70,6 +155,6 @@ Update `__version__` in `src/gp_libs.py` and `pyproject.toml`::
 
 [poetry]: https://python-poetry.org/
 [entr(1)]: http://eradman.com/entrproject/
-[black]: https://github.com/psf/black
-[isort]: https://pypi.org/project/isort/
-[flake8]: https://flake8.pycqa.org/
+[`entr(1)`]: http://eradman.com/entrproject/
+[ruff]: https://ruff.rs
+[mypy]: https://mypy-lang.org/