pyproject.toml

[tool.ruff]
# Target Python 3.10+
target-version = "py310"

# Line length to match common standards
line-length = 120

# Exclude common directories
exclude = [
    ".git",
    ".github",
    ".venv",
    "venv",
    "__pycache__",
    "build",
    "dist",
    "*.egg-info",
    ".idea",
]

[tool.ruff.lint]
# Enable common rule sets
select = [
    "E",      # pycodestyle errors
    "W",      # pycodestyle warnings
    "F",      # Pyflakes
    "I",      # isort
    "B",      # flake8-bugbear
    "C4",     # flake8-comprehensions
    "UP",     # pyupgrade
    "SIM",    # flake8-simplify
]

# Ignore specific rules that may be too strict for existing codebase
ignore = [
    "E501",   # line too long (handled by formatter)
    "E701",   # multiple statements on one line
    "E713",   # test for membership should be `not in`
    "E714",   # test for identity should be `is not`
    "W605",   # invalid escape sequence (many in SQL strings)
    "F541",   # f-string without placeholders
    "B006",   # mutable default argument
    "B008",   # function call in default argument
    "B012",   # return in finally
    "B905",   # zip without strict
    "SIM102", # nested if statements
    "SIM103", # return condition directly
    "SIM108", # ternary operator
    "SIM114", # combine if branches
    "SIM401", # use dict.get()
    "UP007",  # Use X | Y for Union
    "UP009",  # UTF-8 encoding declaration
    "UP015",  # redundant open mode
    "UP030",  # implicit format references
    "UP031",  # format specifiers vs percent
    "UP032",  # f-string vs format()
    "UP036",  # outdated version block
    "I001",   # import sorting (can be enabled later)
]

# Allow unused variables when underscore-prefixed
dummy-variable-rgx = "^(_+|(_+[a-zA-Z0-9_]*[a-zA-Z0-9]+?))$"

[tool.ruff.lint.per-file-ignores]
# Tests can have more relaxed rules
"tests/*" = ["B", "SIM"]
# __init__ files often have unused imports for re-export
"__init__.py" = ["F401"]

[tool.ruff.lint.isort]
known-first-party = ["db_sync_tool"]