noxfile.py

import os
import tempfile

import nox

ALL_PYTHON = ["3.10", "3.11", "3.12"]


# ref: https://stackoverflow.com/questions/59768651/how-to-use-nox-with-poetry
def install_with_constraints(session, *args: str, **kwargs) -> None:
    """
    Install packages constrained by Poetry's lock file.

    This function is a wrapper for nox.sessions.Session.install. It
    invokes pip to install packages inside of the session's virtualenv.
    Additionally, pip is passed a constraints file generated from
    Poetry's lock file, to ensure that the packages are pinned to the
    versions specified in poetry.lock. This allows you to manage the
    packages as Poetry development dependencies.

    Arguments:
        session: The Session object.
        args: Command-line arguments for pip.
        kwargs: Additional keyword arguments for Session.install.
    """
    req_path = os.path.join(tempfile.gettempdir(), os.urandom(24).hex())
    session.run(
        "poetry",
        "export",
        "--with=dev",
        "--format=requirements.txt",
        f"--output={req_path}",
        external=True,
    )
    session.install(f"--constraint={req_path}", "--use-deprecated=legacy-resolver", *args, **kwargs)
    os.unlink(req_path)


@nox.session(reuse_venv=True)
@nox.parametrize("python", ALL_PYTHON)
def tests(session):
    # Prepare pip and poetry
    session.run("python", "-m", "ensurepip", "--upgrade")
    session.install("poetry")
    session.run("poetry", "self", "add", "poetry-plugin-export@latest")

    # Install dev/test dependencies
    session.install("-e", ".[all]")
    install_with_constraints(
        session,
        "pytest",
        "pytest-django",
        "pytest-mock",
    )
    # Install the SQLite driver manually because some environment's sqlite3 version is too old
    # to meet the Django requirement.
    session.install("pysqlite3-binary")

    django_versions = [
        ">=4.2,<5",
        ">=5.0,<6",
    ]
    for django in django_versions:
        session.install(f"django{django}")
        session.run("pytest", *session.posargs)