ci: add ruff linter

Only checks for unused imports for now, more rules can be added later.

Signed-off-by: Erik Larsson <who+github@cnackers.org>

.ci/run.sh

@@ -103,6 +103,10 @@ function run_style() {
   "${PYTHON}" -m black --diff --check "${SRC_ROOT}"
 }
 
+function run_lint() {
+  ruff check "${SRC_ROOT}"
+}
+
 if [ "x${TEST}" != "x" ]; then
   run_test
 elif [ "x${WHITESPACE}" != "x" ]; then
@@ -111,4 +115,6 @@ elif [ "x${STYLE}" != "x" ]; then
   run_style
 elif [ "x${PUBLISH_PKG}" != "x" ]; then
   run_publish_pkg
+elif [ "x${LINT}" != "x" ]; then
+  run_lint()
 fi

.github/workflows/tests.yaml

@@ -92,3 +92,19 @@ jobs:
       env:
         STYLE: 1
       run: ./.ci/run.sh
+
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout Repository
+      uses: actions/checkout@v2
+
+    - name: Install Dependencies
+      run: |
+        python3 -m pip install --user --upgrade pip
+        python3 -m pip install --user --upgrade ruff
+
+    - name: Check
+      env:
+        LINT: 1
+      run: ./.ci/run.sh

pyproject.toml

@@ -22,3 +22,6 @@ exclude = '''
   )
 )
 '''
+
+[tool.ruff.lint]
+select = ["F401"]

setup.cfg

@@ -54,3 +54,4 @@ dev =
     myst-parser
     build
     installer
+    ruff