chore: replace black/flake8 with ruff

tox.ini

@@ -5,7 +5,7 @@
 
 [tox]
 # we use any Python 3
-envlist = py3,mypy,check_style
+envlist = py3,mypy,ruff_test
 skip_missing_interpreters=true
 
 [testenv]
@@ -25,34 +25,25 @@ deps =
 commands=
     mypy sphinx_reredirects
 
-[testenv:check_style]
-description =
-    Run style checks. Do not modify files.
+[testenv:ruff_fix]
+description = Lint and format the code (modify files).
 skip_install = True
 deps =
-    isort==5.10.1
-    black==22.3.0
-    flake8==4.0.1
+    ruff
 commands =
-    ; import order compatible with black formatter
-    isort --check-only --diff --profile black sphinx_reredirects tests setup.py
-    black --check --diff sphinx_reredirects tests setup.py
-    ; Make Flake8 linter compatible with Black formatter
-    ; https://black.readthedocs.io/en/stable/guides/using_black_with_other_tools.html#flake8
-    flake8 --ignore E203 --max-line-length 88 sphinx_reredirects tests setup.py
+    ruff check --fix
+    ruff format
 
-[testenv:fix_style]
-description =
-    Run and fix style (modify files).
+[testenv:ruff_test]
+description = Check linting and formatting rules (do NOT modify files)
 skip_install = True
 deps =
-    isort==5.10.1
-    black==22.3.0
-    flake8==4.0.1
+    ruff
 commands =
-    isort --profile black sphinx_reredirects tests setup.py
-    black sphinx_reredirects tests setup.py
-    flake8 --ignore E203 --max-line-length 88 sphinx_reredirects tests setup.py
+    ; Fail even if violations were fixed
+    ruff check --exit-non-zero-on-fix
+    ; Fail if not properly formatted (don't modify files)
+    ruff format --check
 
 [testenv:docs]
 description = Build docs