fix: add ruff config

pyproject.toml

@@ -6,64 +6,52 @@ readme = "README.md"
 authors = [{ name = "Foo", email = "[email protected]" }]
 license = { text = "MIT" }
 
-# [build-system]
-# requires = [
-#     "mypy",
-#     "flake8",
-#     "flake8-mypy",
-#     "black",
-#     "mccabe",
-#     "virtualenv",
-# ]
-# build-backend = "setuptools.build_meta"
+[tool.ruff]
+ignore = [
+    # E121,
+    # E123,
+    # E126,
+    "E203", # Whitespace before :
+    # E221,
+    "E226", # Whitespace around operators
+    # E228,
+    "E231", # Missing whitespace after ,
+    # E24,
+    # E251,
+    "E261", # 2 spaces before inline comment
+    "E262", # Comments should start with #
+    "E265", # Block comment should start with #
+    # E27,
+    # "E302", # Expected 2 lines between funcs/classes
+    # E501, # line too long (156 > 120 characters)
+    # E701,
+    # E704,
+    # H233,
+    # "W391", # Blank line and the EOF
+    # W503,
+    # W504,
+    "E402", # module level import not at top file
+]
+exclude = [
+    # No need to traverse our git directory
+    ".git",
+    # There's no value in checking cache directories
+    "__pycache__",
+    # The conf file is mostly autogenerated, ignore it
+    "build",
+    # This contains builds of flake8 that we don't want to check
+    "dist",
+]
 
-# # NOTE: flake8 does not support pyproject use .flake8 config
-# [tool.flake8]
-# max-complexity = 20
-# max-line-length = 120
-# ignore =
-#     # E121,
-#     # E123,
-#     # E126,
-#     # Whitespace before :
-#     E203,
-#     # E221,
-#     # Whitespace around operators
-#     E226,
-#     # E228,
-#     # Missing whitespace after ,
-#     E231,
-#     # E24,
-#     # E251,
-#     # 2 spaces before inline comment
-#     E261,
-#     # Comments should start with #
-#     E262,
-#     # Block comment should start with #
-#     E265,
-#     # E27,
-#     # Expected 2 lines between funcs/classes
-#     E302,
-#     # E501,
-#     # E701,
-#     # E704,
-#     # H233,
-#     # Blank line and the EOF
-#     W391,
-#     # W503,
-#     # W504,
-# exclude =
-#     # No need to traverse our git directory
-#     .git,
-#     # There's no value in checking cache directories
-#     __pycache__,
-#     # The conf file is mostly autogenerated, ignore it
-#     build,
-#     # This contains builds of flake8 that we don't want to check
-#     dist
-# per-file-ignores =
-#     # imported but unused
-#     __init__.py: F401
+[tool.ruff.per-file-ignores]
+"__init__.py" = ["F401"]
+
+[tool.ruff.lint.mccabe]
+# Flag errors (`C901`) whenever the complexity level exceeds 20.
+max-complexity = 20
+
+[tool.ruff.lint.pycodestyle]
+max-line-length = 120
 
 [tool.black]
 line-length = 120