replace flake8 with ruff

.flake8

@@ -1,4 +0,0 @@
-[flake8]
-ignore = E127,E226,E301,E302,E303,E305,E306,E309,E402,E701,E711,E712,E731,E741,W504
-max_line_length = 120
-show_source = True

Makefile

@@ -66,25 +66,25 @@ test-shell: $(env)
 test-schema: $(env)
 	$(with_tests_env) ./recreate-schema.sh test
 
-pyflakes: $(env)
-	$(env_py) -m flake8 app.py liberapay tests
+lint: $(env)
+	$(env_py) -m ruff check app.py liberapay tests
 
 test: test-schema pytest
 tests: test
 
 pytest: $(env)
 	$(py_test) ./tests/py/test_$${PYTEST-*}.py
-	@$(MAKE) --no-print-directory pyflakes
+	@$(MAKE) --no-print-directory lint
 	$(py_test) --doctest-modules liberapay
 
 pytest-cov: $(env)
 	$(py_test) --cov-report html --cov liberapay ./tests/py/test_$${PYTEST-*}.py
-	@$(MAKE) --no-print-directory pyflakes
+	@$(MAKE) --no-print-directory lint
 	$(py_test) --doctest-modules liberapay
 
 pytest-re: $(env)
 	$(py_test) --lf ./tests/py/
-	@$(MAKE) --no-print-directory pyflakes
+	@$(MAKE) --no-print-directory lint
 
 pytest-i18n-browse: $(env)
 	@if [ -f sql/branch.sql ]; then $(MAKE) --no-print-directory test-schema; fi

liberapay/models/participant.py

@@ -2863,7 +2863,7 @@ class Participant(Model, MixinTeam):
                 for naive_group in naive_groups:
                     naive_group.sort(key=due_date_getter)
                     group = None
-                    execution_date = weeks_until_execution = None  # for flake8
+                    execution_date = weeks_until_execution = None  # for the linter
                     for tip in naive_group:
                         last_payment_amount = last_payment_amounts.get(tip.tippee)
                         # Start a new group if…

liberapay/testing/elsewhere.py

@@ -1,4 +1,4 @@
-# flake8: noqa
+# ruff: noqa
 
 """
 Examples of data returned by the APIs of the elsewhere platforms.

liberapay/utils/history.py

@@ -241,7 +241,7 @@ def iter_payday_events(db, participant, period_start, period_end, today, minimiz
     prev_date = None
     get_timestamp = lambda e: e['timestamp']
     events = sorted(exchanges+transfers, key=get_timestamp, reverse=True)
-    day_events, day_open = None, None  # for pyflakes
+    day_events, day_open = None, None  # for the linter
     for event in events:
 
         collapse = False

pyproject.toml

@@ -0,0 +1,10 @@
+[tool.ruff]
+# https://docs.astral.sh/ruff/configuration/
+line-length = 120
+output-format = "full"
+
+[tool.ruff.lint]
+ignore = [
+    "E226", "E301", "E302", "E303", "E305", "E306", "E402",
+    "E701", "E711", "E712", "E721", "E731", "E741",
+]

requirements_tests.txt

@@ -1,8 +1,8 @@
-pytest
-pytest-cov
-pytest-cache
-pytest-profiling
-flake8
-vcrpy
 Faker
 html5lib
+pytest
+pytest-cache
+pytest-cov
+pytest-profiling
+ruff
+vcrpy

tox.ini

@@ -7,7 +7,7 @@ commands =
     pip install -q -r requirements_base.txt
     pip install -q -r requirements_tests.txt
     python cli/run.py -e defaults.env,tests/test.env,tests/local.env python -m pytest -Wd --cov liberapay --cov-report lcov tests/py {posargs}
-    flake8 app.py liberapay tests
+    ruff check app.py liberapay tests
     python cli/run.py -e defaults.env,tests/test.env,tests/local.env python -m pytest --doctest-modules liberapay
 passenv =
     LIBERAPAY_I18N_TEST