support older python versions

Author: jedwards4b

.github/workflows/pylint.yml

@@ -1,23 +1,98 @@
-name: Pylint
+name: CI
 
-on: [push]
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
 
 jobs:
-  build:
+  lint:
+    name: pre-commit
     runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.13'
+          cache: 'pip'
+
+      - name: Install Poetry
+        run: |
+          python -m pip install --upgrade pip
+          python -m pip install pipx
+          pipx install poetry
+          poetry --version
+
+      - name: Enable in-project venv for better caching
+        run: poetry config virtualenvs.in-project true
+
+      - name: Cache virtualenv
+        uses: actions/cache@v4
+        with:
+          path: .venv
+          key: venv-${{ runner.os }}-py${{ hashFiles('**/poetry.lock') }}
+          restore-keys: |
+            venv-${{ runner.os }}-
+
+      - name: Install deps (incl. dev)
+        run: poetry install --no-interaction --no-ansi
+
+      - name: Run pre-commit on all files
+        run: poetry run pre-commit run --all-files
+
+  tests:
+    name: pytest (matrix)
+    runs-on: ubuntu-latest
+    needs: lint
     strategy:
+      fail-fast: false
       matrix:
-        python-version: ["3.9", "3.x"]
+        python-version: ['3.10', '3.x']
+
     steps:
-    - uses: actions/checkout@v4
-    - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v3
-      with:
-        python-version: ${{ matrix.python-version }}
-    - name: Install dependencies
-      run: |
-        python -m pip install --upgrade pip
-        pip install pylint
-    - name: Analysing the code with pylint
-      run: |
-        pylint $(git ls-files '*.py')
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v5
+        with:
+          python-version: ${{ matrix.python-version }}
+          cache: 'pip'
+
+      - name: Install Poetry
+        run: |
+          python -m pip install --upgrade pip
+          python -m pip install pipx
+          pipx install poetry
+          poetry --version
+
+      - name: Enable in-project venv for better caching
+        run: poetry config virtualenvs.in-project true
+
+      - name: Cache virtualenv
+        uses: actions/cache@v4
+        with:
+          path: .venv
+          key: venv-${{ runner.os }}-py${{ matrix.python-version }}-${{ hashFiles('**/poetry.lock') }}
+          restore-keys: |
+            venv-${{ runner.os }}-py${{ matrix.python-version }}-
+            venv-${{ runner.os }}-
+
+      - name: Install deps (incl. dev)
+        run: poetry install --no-interaction --no-ansi
+
+      # If your tests need environment variables, set them here (example):
+      # - name: Set test env
+      #   run: echo "CMIP7_PREP_TEST=1" >> $GITHUB_ENV
+
+      - name: Run pytest
+        run: poetry run pytest -q