CI: Convert tox config to pyproject.toml, update tox envs

.github/workflows/main.yml

@@ -21,7 +21,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        tox_env: [py39, py310,  py311,  py312,  py313, pypy3, pep8]
+        tox_env: [py39, py310,  py311,  py312,  py313, pypy3]
 
     # Use GitHub's Linux Docker host
     runs-on: ubuntu-latest
@@ -32,23 +32,15 @@ jobs:
       - uses: actions/checkout@v4
         with:
           fetch-depth: 0
-      - name: Install ruff
-        run: |
-          python3 -m pip install --break-system-packages ruff mypy
+      - name: Install tox
+        run: python -m pip install tox
       - name: Run ruff format
         run: |
-          ruff --version
-          if ! ruff format --check --quiet varlink
-          then
-              echo "Please run 'ruff format' on the above files or apply the diffs below manually"
-              ruff format --check --quiet --diff varlink
-          fi
+          tox -e ruff-format
       - name: Run ruff check
         run: |
-          ruff --version
-          ruff check varlink
+          tox -e ruff-check
       - name: Type Checking (mypy)
         run: |
-          python3 -m mypy --version
-          python3 -m mypy varlink/
+          tox -e mypy
     runs-on: ubuntu-latest

pyproject.toml

@@ -13,3 +13,46 @@ local_scheme = "no-local-version"
 target-version = "py39"
 line-length = 109
 lint.select = ["E", "F", "I", "UP"]
+
+[tool.mypy]
+python_version = 3.9
+
+### tox configuration ###
+[tool.tox]
+env_list = ["py313", "py312", "py311", "py310", "py39", "pypy3"]
+
+[tool.tox.env_run_base]
+description = "Run test suite on {base_python}"
+deps = ["-r{toxinidir}/test-requirements.txt"]
+commands = [
+    ["pytest", "--cov=varlink", "--cov-report=term", "{posargs:varlink}"]
+]
+
+[tool.tox.env_run_base.set_env]
+VIRTUAL_ENV="{envdir}"
+BRANCH_NAME="master"
+CLIENT_NAME="varlink"
+
+[tool.tox.env.ruff-format]
+description = "Check formatting using the ruff tool"
+deps = ["ruff"]
+commands = [
+    ["ruff", "--version"],
+    ["ruff", "format", "--quiet", "--check", "--diff", "{posargs:varlink}"]
+]
+
+[tool.tox.env.ruff-check]
+description = "Run linting checks using the ruff tool"
+deps = ["ruff"]
+commands = [
+    ["ruff", "--version"],
+    ["ruff", "check", "{posargs:varlink}"]
+]
+
+[tool.tox.env.mypy]
+description = "Run type checking tool mypy"
+deps = ["mypy"]
+commands = [
+    ["mypy", "--version"],
+    ["mypy", "{posargs:varlink}"]
+]

test-requirements.txt

@@ -1,2 +1,2 @@
-fixtures
-nose2
+pytest
+pytest-cov