Tune ruff config, using xarray's setup to start

CHANGELOG.md

@@ -18,6 +18,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Improved README.
 - Improved CONTRIBUTING.
 - Add project URLs to package metadata.
+- Various improvement to internal code formatting and style.
 
 ## [0.1.0] - 2026-05-06
 

pyproject.toml

@@ -26,3 +26,34 @@ dev = [
     { include-group = "tests" },
     "prek>=0.3.13",
 ]
+
+[tool.ruff.lint]
+extend-select = [
+  "YTT",  # flake8-2020
+  "B",    # flake8-bugbear
+  "C4",   # flake8-comprehensions
+  "ISC",  # flake8-implicit-str-concat
+  "PIE",  # flake8-pie
+  "TID",  # flake8-tidy-imports (absolute imports)
+  "PYI",  # flake8-pyi
+  "SIM",  # flake8-simplify
+  "FLY",  # flynt
+  "I",    # isort
+  "PERF", # Perflint
+  "W",    # pycodestyle warnings
+  "PGH",  # pygrep-hooks
+  "PLC",  # Pylint Convention
+  "PLE",  # Pylint Errors
+  "PLR",  # Pylint Refactor
+  "PLW",  # Pylint Warnings
+  "UP",   # pyupgrade
+  "FURB", # refurb
+  "RUF",
+]
+
+[tool.ruff.lint.isort]
+known-first-party = ["isku"]
+
+[tool.ruff.lint.flake8-tidy-imports]
+# Disallow all relative imports.
+ban-relative-imports = "all"

src/isku/__init__.py

@@ -1,18 +1,18 @@
+from collections.abc import Callable
 from dataclasses import dataclass
-from typing import Protocol, Callable
+from typing import Protocol
 
 import xarray as xr
 
-
 __all__ = [
+    "ExtractionWorkflow",
+    "GridWeightingRegions",
+    "ProjectionWorkflow",
+    "RegionExtractor",
     "build_extraction_workflow",
-    "extract_regions",
     "build_projection_workflow",
+    "extract_regions",
     "project",
-    "GridWeightingRegions",
-    "ExtractionWorkflow",
-    "RegionExtractor",
-    "ProjectionWorkflow",
 ]
 
 

tests/smoke_test.py

@@ -3,6 +3,7 @@
 """
 
 import xarray as xr
+
 import isku