Improve tooling

.flake8

@@ -0,0 +1,13 @@
+[flake8]
+doctests = 1
+ignore =
+    # black takes care of line length
+    E501,
+    # black takes care of where to break lines
+    W503,
+    # black takes care of spaces within slicing (list[:])
+    E203,
+    # black takes care of spaces after commas
+    E231,
+    # as one has to use self.XX it should not be a problem
+    A003,

.github/workflows/testing.yml

@@ -9,14 +9,10 @@ env:
 jobs:
   test:
     name: Testing on
-    runs-on: ${{ matrix.os }}
+    runs-on: "ubuntu-latest"
     strategy:
       matrix:
         python-version: ["3.12", "3.11", "3.10", 3.9, 3.8, pypy-3.9]
-        os: ["ubuntu-22.04"]
-        include:
-          - os: "ubuntu-latest"
-            python-version: 3.11
     steps:
       - uses: actions/checkout@v4
       - name: Set up Python
@@ -27,39 +23,36 @@ jobs:
         uses: actions/cache@v3
         with:
           path: ~/.cache/pip
-          key: ${{ runner.os }}-pip-${{ matrix.python-version }}-${{ hashFiles('requirements.txt') }}
+          key: ${{ runner.os }}-pip-${{ matrix.python-version }}-${{ hashFiles('tox.ini') }}
           restore-keys: |
             ${{ runner.os }}-pip-${{ matrix.python-version }}-
-      - name: pip version
-        run: pip --version
       - name: Install dependencies
-        if: matrix.python-version == '3.9'
-        run: python -m pip install -r requirements-lint.txt
-      - name: Install dependencies
-        if: matrix.python-version != '3.9'
-        run: python -m pip install -r requirements.txt
-      # formatters
-      - name: Run pyupgrade
-        if: matrix.python-version == '3.9'
-        run: pyupgrade --py37-plus *.py
-      - name: Run isort
-        if: matrix.python-version == '3.9'
-        run: isort --check-only *.py
-      - name: Run black
-        if: matrix.python-version == '3.9'
-        run: black --check --skip-string-normalization *.py
-      # linters
-      - name: Lint with bandit
-        if: matrix.python-version == '3.9'
-        run: bandit --skip B101 *.py  # B101 is assert statements
-      - name: Lint with codespell
-        if: matrix.python-version == '3.9'
-        run: codespell *.rst *.py
-      - name: Lint with flake8
-        if: matrix.python-version == '3.9'
-        run: flake8 *.py --count --max-complexity=18 --max-line-length=88 --show-source --statistics
-      # tests and coverage
+        run: python -m pip install tox
       - name: Test
-        run: pytest run_tests.py --cov --cov-report term-missing
-      - name: Coverage
-        run: coveralls --service=github
+        run: tox -e test
+
+  lint:
+    name: Lint code
+    runs-on: "ubuntu-latest"
+    strategy:
+      matrix:
+        python-version: [3.8]
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up Python
+        uses: actions/setup-python@v4
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Cache packages
+        uses: actions/cache@v3
+        with:
+          path: |
+            ~/.cache/pre-commit
+            ~/.cache/pip
+          key: ${{ runner.os }}-pip-${{ matrix.python-version }}-${{ hashFiles('tox.ini') }}
+          restore-keys: |
+            ${{ runner.os }}-pip-${{ matrix.python-version }}-
+      - name: Install dependencies
+        run: python -m pip install tox
+      - name: Run linting
+        run: tox -e lint

.pre-commit-config.yaml

@@ -0,0 +1,50 @@
+ci:
+    autofix_prs: false
+    autoupdate_schedule: monthly
+
+repos:
+-   repo: https://github.com/asottile/pyupgrade
+    rev: v3.14.0
+    hooks:
+    -   id: pyupgrade
+        args: [--py38-plus]
+-   repo: https://github.com/pycqa/isort
+    rev: 5.12.0
+    hooks:
+    -   id: isort
+-   repo: https://github.com/psf/black
+    rev: 23.9.1
+    hooks:
+    -   id: black
+-   repo: https://github.com/PyCQA/flake8
+    rev: 6.1.0
+    hooks:
+    -   id: flake8
+        additional_dependencies:
+          - flake8-bugbear
+          - flake8-comprehensions
+          - flake8-debugger
+          - flake8-deprecated
+          - flake8-isort
+          - flake8-pep3101
+          - flake8-print
+          - flake8-quotes
+
+-   repo: https://github.com/codespell-project/codespell
+    rev: v2.2.6
+    hooks:
+    -   id: codespell
+        additional_dependencies:
+          - tomli
+-   repo: https://github.com/mgedmin/check-manifest
+    rev: "0.49"
+    hooks:
+    -   id: check-manifest
+-   repo: https://github.com/regebro/pyroma
+    rev: "4.2"
+    hooks:
+    -   id: pyroma
+-   repo: https://github.com/mgedmin/check-python-versions
+    rev: "0.21.3"
+    hooks:
+    -   id: check-python-versions

CHANGES.rst

@@ -6,8 +6,8 @@ Changelog
 2.2.0a1 (unreleased)
 --------------------
 
-- Nothing changed yet.
-
+- Use `tox` and `pre-commit` to ease project maintenance.
+  [gforcada]
 
 2.2.0a0 (2023-11-01)
 --------------------

flake8_builtins.py

@@ -1,14 +1,8 @@
+from flake8 import utils as stdin_utils
+
 import ast
 import builtins
 import inspect
-import sys
-
-from flake8 import utils as stdin_utils
-
-if sys.version_info >= (3, 8):
-    NamedExpr = ast.NamedExpr
-else:  # There was no walrus operator before python3.8
-    NamedExpr = type('NamedExpr', (ast.AST,), {})
 
 
 class BuiltinsChecker:
@@ -88,7 +82,7 @@ def run(self):
 
         value = None
         for statement in ast.walk(tree):
-            if isinstance(statement, (ast.Assign, ast.AnnAssign, NamedExpr)):
+            if isinstance(statement, (ast.Assign, ast.AnnAssign, ast.NamedExpr)):
                 value = self.check_assignment(statement)
 
             elif isinstance(statement, function_nodes):

pyproject.toml

@@ -27,6 +27,7 @@ classifiers = [
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
         "Programming Language :: Python :: 3.11",
+        "Programming Language :: Python :: 3.12",
         "Programming Language :: Python :: Implementation :: CPython",
         "Programming Language :: Python :: Implementation :: PyPy",
         "Topic :: Software Development",
@@ -44,3 +45,16 @@ test = ["pytest"]
 
 [project.entry-points."flake8.extension"]
 A00 = "flake8_builtins:BuiltinsChecker"
+
+[tool.isort]
+profile = "plone"
+
+[tool.black]
+target-version = ["py38"]
+skip-string-normalization = true
+
+[tool.check-manifest]
+ignore = [
+    ".vscode/*",
+    "venv/*",
+]