Replace pylint CI with ruff

.github/workflows/on_pull_request.yaml

@@ -18,22 +18,29 @@ jobs:
     steps:
       - name: Checkout Code
         uses: actions/checkout@v3
-      - name: Set up Python 3.10
-        uses: actions/setup-python@v4
+      - uses: actions/setup-python@v4
         with:
-          python-version: 3.10.6
-          cache: pip
-          cache-dependency-path: |
-            **/requirements*txt
-      - name: Install PyLint
-        run: | 
-          python -m pip install --upgrade pip
-          pip install pylint
-      # This lets PyLint check to see if it can resolve imports
-      - name: Install dependencies
-        run: |
-          export COMMANDLINE_ARGS="--skip-torch-cuda-test --exit"
-          python launch.py
-      - name: Analysing the code with pylint
-        run: |
-          pylint $(git ls-files '*.py')
+          python-version: 3.11
+          # NB: there's no cache: pip here since we're not installing anything
+          #     from the requirements.txt file(s) in the repository; it's faster
+          #     not to have GHA download an (at the time of writing) 4 GB cache
+          #     of PyTorch and other dependencies.
+      - name: Install Ruff
+        run: pip install ruff==0.0.265
+      - name: Run Ruff
+        run: ruff .
+
+# The rest are currently disabled pending fixing of e.g. installing the torch dependency.
+
+#      - name: Install PyLint
+#        run: |
+#          python -m pip install --upgrade pip
+#          pip install pylint
+#      # This lets PyLint check to see if it can resolve imports
+#      - name: Install dependencies
+#        run: |
+#          export COMMANDLINE_ARGS="--skip-torch-cuda-test --exit"
+#          python launch.py
+#      - name: Analysing the code with pylint
+#        run: |
+#          pylint $(git ls-files '*.py')

ruff.toml

@@ -0,0 +1,10 @@
+target-version = "py310"
+
+select = [
+    "E999",  # syntax error
+]
+
+extend-exclude = [
+    "extensions",
+    "extensions-disabled",
+]