👷(backend) use astral-sh/ruff to make linting faster and simpler

Introduce ruff and use it to replace isort, flake8, pycodestyle and
bandit by configuring it through pyproject.toml

This change might not be iso but should be close and brings a
considerable speed improvement to the make lint command

Not all checks have been activated in the config file so we can still
make ruff stricter.

The fix flag is set to true and ruff will (apparently aggressively) fix
the violations. This behavior can be tamed via the unfixable config
entry

.circleci/config.yml

@@ -163,31 +163,14 @@ jobs:
       - restore_cache:
           keys:
             - v1-dependencies-python:3.11-{{ .Revision }}
-      - run:
-          name: Lint code with flake8
-          command: ~/.local/bin/flake8 --toml-config core/pyproject.toml core plugins
-          working_directory: src/backend
-      - run:
-          name: Lint code with isort
-          command: ~/.local/bin/isort --recursive --check-only --settings-file core/pyproject.toml core plugins
-          working_directory: src/backend
       - run:
           name: Lint code with black
           command: ~/.local/bin/black --check --config core/pyproject.toml core plugins
           working_directory: src/backend
       - run:
-          name: Lint code with pylint
-          command: ~/.local/bin/pylint core plugins
+          name: Lint code with ruff
+          command: ~/.local/bin/ruff --config core/pyproject.toml core plugins
           working_directory: src/backend
-      - run:
-          name: Lint code with bandit
-          command: ~/.local/bin/bandit -c core/pyproject.toml -qr core/warren plugins
-          working_directory: src/backend
-      - run:
-          name: Lint code with pydocstyle
-          command: ~/.local/bin/pydocstyle --config core/pyproject.toml core plugins
-          working_directory: src/backend
-
   test-backend:
     parameters:
       python-image:

Makefile

@@ -175,16 +175,10 @@ fixtures: \
 
 
 # -- Linters
-#
-# Nota bene: Black should come after isort just in case they don't agree...
 lint: ## lint backend python sources
 lint: \
-  lint-isort \
   lint-black \
-  lint-flake8 \
-  lint-pylint \
-  lint-bandit \
-  lint-pydocstyle \
+  lint-ruff \
 	lint-frontend
 .PHONY: lint
 
@@ -195,30 +189,15 @@ lint-black: ## lint backend python sources with black
 	@$(COMPOSE_RUN_BACKEND) black --config core/pyproject.toml core plugins
 .PHONY: lint-black
 
-lint-flake8: ## lint backend python sources with flake8
-	@echo 'lint:flake8 started…'
-	@$(COMPOSE_RUN_BACKEND) flake8 --toml-config core/pyproject.toml core plugins
-.PHONY: lint-flake8
-
-lint-isort: ## automatically re-arrange python imports in backend code base
-	@echo 'lint:isort started…'
-	@$(COMPOSE_RUN_BACKEND) isort --settings-file core/pyproject.toml --atomic core plugins
-.PHONY: lint-isort
-
-lint-pylint: ## lint backend python sources with pylint
-	@echo 'lint:pylint started…'
-	@$(COMPOSE_RUN_BACKEND) pylint core plugins
-.PHONY: lint-pylint
-
-lint-bandit: ## lint backend python sources with bandit
-	@echo 'lint:bandit started…'
-	@$(COMPOSE_RUN_BACKEND) bandit -c core/pyproject.toml -qr core/warren plugins
-.PHONY: lint-bandit
-
-lint-pydocstyle: ## lint Python docstrings with pydocstyle
-	@echo 'lint:pydocstyle started…'
-	@$(COMPOSE_RUN_BACKEND) pydocstyle --config core/pyproject.toml core plugins
-.PHONY: lint-pydocstyle
+lint-ruff: ## lint backend python sources with ruff
+	@echo 'lint:ruff started…'
+	@$(COMPOSE_RUN_BACKEND) ruff --config core/pyproject.toml core plugins
+.PHONY: lint-ruff
+
+lint-ruff-fix: ## lint and fix backend python sources with ruff
+	@echo 'lint:ruff-fix started…'
+	@$(COMPOSE_RUN_BACKEND) ruff --config core/pyproject.toml core plugins --fix
+.PHONY: lint-ruff-fix
 
 ### Frontend ###