enable ruff linting etc.

.github/workflows/lint.yaml

@@ -0,0 +1,38 @@
+name: Lint
+on:
+  push: { branches: [ "main" ] }
+  pull_request: { branches: [ "main" ] }
+
+concurrency:
+  group: lint-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  python-linter:
+    runs-on: ubuntu-latest
+    steps:
+      - name: checkout
+        uses: actions/checkout@v4
+        with: { submodules: recursive }
+      - name: setup conda environment
+        uses: conda-incubator/setup-miniconda@v3
+        with:
+          python-version: "${{ matrix.python }}"
+          miniforge-variant: Mambaforge
+      - name: install dependencies
+        shell: bash -l {0}
+        run: |
+          mamba env update --quiet -n test -f environment-dev.yml
+          mamba list
+      - name: ruff lint
+        shell: bash -l {0}
+        run: |
+          ruff check .
+      - name: ruff format
+        shell: bash -l {0}
+        run: |
+          ruff format .
+      - name: ruff isort
+        shell: bash -l {0}
+        run: |
+          ruff check --select I .

environment-dev.yml

@@ -7,12 +7,10 @@ channels:
   - defaults
 dependencies:
   - astropy>=5,<6
-  - black
   - click>=8,<9
   - datapackage>=1.15,<2
   - desktop-app>=0.3
   - dill>=0.3.4,<0.4
-  - isort
   - jupytext
   - mypy>0.93
   - myst-nb
@@ -21,10 +19,10 @@ dependencies:
   - pint>=0.18,<1
   - pip>=22,<23
   - pyinstaller>=5.7.0
-  - pylint>=2.12,<3
   - pyqt>=5.12,<5.131
   - pytest>=6.2,<7
   - pyyaml>=6,<7
+  - ruff
   - sphinx
   - sphinx_rtd_theme
   - toml>0.10