build: add Ruff for Python code linting

.github/workflows/main.yml

@@ -8,7 +8,7 @@ env:
     libjson-glib-dev libsystemd-dev libudev-dev libunistring-dev
     python3-dev python3-evdev swig python3-sphinx
   UBUNTU_DEP_TEST: check python3-gi python3-lxml valgrind
-  PIP_PACKAGES: meson ninja libevdev pyudev pytest sphinx_rtd_theme black
+  PIP_PACKAGES: meson ninja libevdev pyudev pytest sphinx_rtd_theme black ruff
 
 jobs:
   build-and-dist:

meson.build

@@ -649,4 +649,21 @@ test(
   env: env_test,
 )
 
+#### code linting #####
+run_target(
+  'python-ruff',
+  command : 'tools/python-ruff.sh',
+)
+
+python_ruff_check = find_program(join_paths(meson.source_root(), 'test/python-ruff-check.sh'))
+run_target(
+  'python-ruff-check',
+  command : python_ruff_check,
+)
+test(
+  'python-ruff-check',
+  python_ruff_check,
+  env: env_test,
+)
+
 subdir('doc')

pyproject.toml

@@ -1,2 +1,23 @@
 [tool.black]
 target-version = ["py37"]
+
+[tool.ruff]
+target-version = "py37"
+select = [
+	# pycodestyle
+	"E",
+	"W",
+	# pyflakes
+	"F",
+	# pyupgrade
+	# Use modern Python features for the best possible develop experience.
+	"UP",
+	# flake8-bugbear
+	# Find obvious bugs.
+	"B",
+]
+ignore = [
+	# Line too long.
+	# We have some places where it's just impossible to make it fit,
+	"E501",
+]

test/python-ruff-check.sh

@@ -0,0 +1,10 @@
+#!/bin/sh
+
+if [ -z "$MESON_SOURCE_ROOT" ]; then
+	echo "Expected \$MESON_SOURCE_ROOT to be set. Are you sure you are running this through ninja?"
+	exit 100
+fi
+
+cd "$MESON_SOURCE_ROOT" || exit 101
+
+ruff check $(git ls-files "*.py" "*.py.in")

tools/python-ruff.sh

@@ -0,0 +1,10 @@
+#!/bin/sh
+
+if [ -z "$MESON_SOURCE_ROOT" ]; then
+	echo "Expected \$MESON_SOURCE_ROOT to be set. Are you sure you are running this through ninja?"
+	exit 100
+fi
+
+cd "$MESON_SOURCE_ROOT" || exit 101
+
+ruff check --fix $(git ls-files "*.py" "*.py.in")