fix: GitHub Action can now be used on ubuntu-18.04 runner

.github/workflows/action.yml

@@ -0,0 +1,22 @@
+name: Action
+on:
+ push:
+ branches:
+ - 'main'
+ - '**action**'
+ pull_request:
+ paths:
+ - '.github/workflows/action.yml'
+ - 'action.yml'
+env:
+ FORCE_COLOR: "1"
+jobs:
+ action-default-tests:
+ runs-on: ${{ matrix.os }}
+ strategy:
+ matrix:
+ os: [ubuntu-18.04, ubuntu-20.04, ubuntu-22.04, windows-2019, windows-2022, macos-10.15, macos-11, macos-12]
+ steps:
+ - uses: actions/checkout@v3
+ - uses: ./
+ - run: nox --non-interactive --error-on-missing-interpreter --session github_actions_default_tests

action.yml

@@ -31,5 +31,6 @@ runs:
  python-version: "3.10"
 
  - name: "Install nox"
- run: pipx install '${{ github.action_path }}'
+ # --python "$(which python)" => always use the last setup-python version to install nox.
+ run: pipx install --python "$(which python)" '${{ github.action_path }}'
  shell: bash

noxfile.py

@@ -105,3 +105,31 @@ def docs(session: nox.Session) -> None:
  sphinx_args.insert(0, "--open-browser")
 
  session.run(sphinx_cmd, *sphinx_args)
+
+
+# The following sessions are only to be run in CI to check the nox GHA action
+def _check_python_version(session: nox.Session) -> None:
+ if session.python.startswith("pypy"):
+ python_version = session.python[4:]
+ implementation = "pypy"
+ else:
+ python_version = session.python
+ implementation = "cpython"
+ session.run(
+ "python",
+ "-c",
+ "import sys; assert '.'.join(str(v) for v in sys.version_info[:2]) =="
+ f" '{python_version}'",
+ )
+ if python_version[:2] != "2.":
+ session.run(
+ "python",
+ "-c",
+ f"import sys; assert sys.implementation.name == '{implementation}'",
+ )
+
+
+@nox.session(python=["3.7", "3.8", "3.9", "3.10", "pypy3.7", "pypy3.8", "pypy3.9"])
+def github_actions_default_tests(session: nox.Session) -> None:
+ """Check default versions installed by the nox GHA Action"""
+ _check_python_version(session)