Introduce Ruff github CI with some basic linter rules

And also to help catching syntax errors on older Python versions.

.github/workflows/ci-black-formatting.yaml

@@ -23,6 +23,8 @@ jobs:
         run: |
           python3 -m pip install --upgrade pip
           python3 -m pip install 'black>=24.10.0'
+          curl -LsSf https://astral.sh/uv/install.sh | sh
+          uv tool install ruff
 
       # black doesn't catch all syntax errors, so we check them explicitly.
       - name: Check syntax errors
@@ -35,18 +37,27 @@ jobs:
         continue-on-error: true
 
       - name: Black formatter
-        id: linting
+        id: black
         run: |
           python3 -m black --diff --check .
         continue-on-error: true
 
+      - name: Ruff check
+        id: ruff
+        run: |
+          uvx ruff check
+        continue-on-error: true
+
       - name: Final check
         run: |
           ERROR=0
           if [ "${{ steps.syntax-errors.outcome }}" != "success" ]; then
             echo "::error::Syntax errors check failed, see 'syntax-errors' step for the details." && ERROR=1
           fi
-          if [ "${{ steps.linting.outcome }}" != "success" ]; then
-            echo "::error::Black formatting check failed, see 'linting' step for the details." && ERROR=1
+          if [ "${{ steps.black.outcome }}" != "success" ]; then
+            echo "::error::Black formatting check failed, see 'black' step for the details." && ERROR=1
+          fi
+          if [ "${{ steps.ruff.outcome }}" != "success" ]; then
+            echo "::error::Ruff check failed, see 'ruff' step for the details." && ERROR=1
           fi
           exit $ERROR

pyproject.toml

@@ -38,3 +38,46 @@ disableBytesTypePromotions = true
 reportUnnecessaryTypeIgnoreComment = true
 # Just to add a quick insert of `# pyright: ignore[xxx]` comments in Pylance.
 enableTypeIgnoreComments = false
+
+# Define here general ruff settings,
+# then they will be inherited projects .toml files.
+# This allows using assuming different Python version for different projects.
+[tool.ruff]
+exclude = [
+    # Submodules.
+    "src/ifcopenshell-python/ifcopenshell/express",
+    "src/ifcopenshell-python/ifcopenshell/mvd",
+    "src/ifcopenshell-python/ifcopenshell/simple_spf",
+    "src/svgfill",
+    #
+    # Unformatted.
+    "src/exterior-shell-extractor",
+    # Incompatible with linter.
+    "src/ifc2ca/templates",
+]
+[tool.ruff.lint]
+select = [
+    # Default Ruff rules.
+    # "E4",  # imports
+    # "E7",  # statements
+    "E9",  # io errors
+    # "F",  # pyflakes
+    #
+    "FA",  # future annotations
+    "UP",  # pyupgrade
+]
+ignore = [
+    "FA100", # Conflicts with Blender using annotations for props definitions.
+    # Maybe will enable later:
+    "UP006", # deprecated symbols
+    "UP007", # Optional to X | Y
+    "UP015", # Unnecessary mode argument
+    "UP028", # yield for -> yield from
+    "UP030", # implicit references for positional format fields
+    "UP031", # Replace % with .format
+    "UP032", # Replace .format with f-string
+    "UP035", # List -> list
+
+    # Deprecated Ruff rules.
+    "UP038", # Use X | Y in isinstance
+]

src/bonsai/docs/guides/development/code_style.rst

@@ -2,7 +2,7 @@ Code style
 ============
 
 
-Black code formatter
+Code formatters
 -------------------------------
 For Python code formatting, we use `Black code formatter <https://pypi.org/project/black/>`__, 
 black settings are stored in the repository's pyproject.toml.
@@ -19,3 +19,17 @@ We have GitHub workflow `ci-black-formatting` to maintain black formatting acros
    # Format only some specific file.
    black src/bonsai/bonsai/bim/module/qto/operator.py
 
+
+There is also `ruff` with some basic linter rules (checked automatically by the same Github workflow).
+Which also helps maintaining consistency across the code base
+and ensure new Python syntax doesn't break code on older Python versions.
+
+``ruff`` can be installed using ``pip install ruff`` and files can be formatted with the following example commands:
+
+.. code-block:: bash
+   # Check issues for the entire repository.
+   ruff check
+   # Apply some automatic fixes, if available.
+   ruff check --fix
+   # Check only some specific file.
+   ruff src/bonsai/bonsai/bim/module/qto/operator.py

src/bonsai/pyproject.toml

@@ -13,6 +13,7 @@ keywords = ["IFC", "Blender", "BIM"]
 classifiers = [
     "Programming Language :: Python :: 3",
 ]
+requires-python = ">=3.11"
 dependencies = [
     "ifcopenshell",
 ]
@@ -28,3 +29,6 @@ exclude = ["test*"]
 
 [tool.setuptools.package-data]
 "*" = ["*.*", "libs/desktop/bonsai", "libs/bin/ifcmerge"]
+
+[tool.ruff]
+extend = "../../pyproject.toml"

src/ifcopenshell-python/pyproject.toml

@@ -36,3 +36,6 @@ include = ["ifcopenshell*"]
 
 [tool.setuptools.package-data]
 "*" = ["*.*"]
+
+[tool.ruff]
+extend = "../../pyproject.toml"