style: add ruff config

Signed-off-by: Kiki L Hakiem <[email protected]>

Author: kikihakiem

providers/openfeature-provider-unleash/pyproject.toml

@@ -34,6 +34,7 @@ dev = [
   "psycopg2-binary>=2.9.0,<3.0.0",
   "testcontainers>=4.12.0,<5.0.0",
   "types-requests>=2.31.0",
+  "ruff>=0.12.10",
 ]
 
 [tool.uv.build-backend]
@@ -69,6 +70,68 @@ markers = [
     "integration: marks tests as integration tests (deselect with '-m \"not integration\"')",
 ]
 
+[tool.ruff]
+target-version = "py39"
+exclude = [
+    ".git",
+    ".venv",
+    "__pycache__",
+    "venv",
+]
+
+[tool.ruff.lint]
+select = [
+    "A",
+    "B",
+    "C4",
+    "C90",
+    "E",
+    "F",
+    "FLY",
+    "FURB",
+    "I",
+    "LOG",
+    "N",
+    "PERF",
+    "PGH",
+    "PLC",
+    "PLR0913",
+    "PLR0915",
+    "RUF",
+    "S",
+    "SIM",
+    "T10",
+    "T20",
+    "UP",
+    "W",
+    "YTT",
+]
+ignore = [
+    "E501", # the formatter will handle any too long line
+]
+
+[tool.ruff.lint.per-file-ignores]
+"**/tests/**/*" = [
+    "S101",  # Use of assert detected
+    "S105",  # Possible hardcoded password
+    "S106",  # Possible hardcoded password assigned to argument
+    "S104",  # Possible binding to all interfaces
+    "T201",  # print found
+    "PERF203",  # try-except within a loop incurs performance overhead
+    "PLR0915",  # Too many statements
+]
+
+[tool.ruff.lint.isort]
+known-first-party = ["openfeature"]
+
+[tool.ruff.lint.pylint]
+max-args = 6
+max-statements = 30
+
+[tool.ruff.lint.pyupgrade]
+# Preserve types, even if a file imports `from __future__ import annotations`.
+keep-runtime-typing = true
+
 [project.scripts]
 # workaround while UV doesn't support scripts directly in the pyproject.toml
 # see: https://github.com/astral-sh/uv/issues/5903

providers/openfeature-provider-unleash/src/scripts/scripts.py

@@ -26,3 +26,8 @@ def cov() -> None:
 def mypy() -> None:
     """Run mypy."""
     subprocess.run("mypy", shell=True, check=True)
+
+
+def lint() -> None:
+    """Run ruff linting."""
+    subprocess.run("ruff check", shell=True, check=True)