noxfile.py

"""Nox sessions."""

import os
import shlex
import shutil
import sys
from glob import glob
from pathlib import Path
from textwrap import dedent

import nox

try:
    from nox_poetry import Session, session
except ImportError:
    message = f"""\
    Nox failed to import the 'nox-poetry' package.

    Please install it using the following command:

    {sys.executable} -m pip install nox-poetry"""
    raise SystemExit(dedent(message)) from None


package = "shrinkray"
python_versions = ["3.12"]
nox.needs_version = ">= 2021.6.6"
nox.options.sessions = (
    "pre-commit",
    "safety",
    "mypy",
    "tests",
    "typeguard",
    "xdoctest",
    "docs-build",
)


def activate_virtualenv_in_precommit_hooks(session: Session) -> None:
    """Activate virtualenv in hooks installed by pre-commit.

    This function patches git hooks installed by pre-commit to activate the
    session's virtual environment. This allows pre-commit to locate hooks in
    that environment when invoked from git.

    Args:
        session: The Session object.
    """
    assert session.bin is not None  # noqa: S101

    # Only patch hooks containing a reference to this session's bindir. Support
    # quoting rules for Python and bash, but strip the outermost quotes so we
    # can detect paths within the bindir, like <bindir>/python.
    bindirs = [
        bindir[1:-1] if bindir[0] in "'\"" else bindir
        for bindir in (repr(session.bin), shlex.quote(session.bin))
    ]

    virtualenv = session.env.get("VIRTUAL_ENV")
    if virtualenv is None:
        return

    headers = {
        # pre-commit < 2.16.0
        "python": f"""\
            import os
            os.environ["VIRTUAL_ENV"] = {virtualenv!r}
            os.environ["PATH"] = os.pathsep.join((
                {session.bin!r},
                os.environ.get("PATH", ""),
            ))
            """,
        # pre-commit >= 2.16.0
        "bash": f"""\
            VIRTUAL_ENV={shlex.quote(virtualenv)}
            PATH={shlex.quote(session.bin)}"{os.pathsep}$PATH"
            """,
        # pre-commit >= 2.17.0 on Windows forces sh shebang
        "/bin/sh": f"""\
            VIRTUAL_ENV={shlex.quote(virtualenv)}
            PATH={shlex.quote(session.bin)}"{os.pathsep}$PATH"
            """,
    }

    hookdir = Path(".git") / "hooks"
    if not hookdir.is_dir():
        return

    for hook in hookdir.iterdir():
        if hook.name.endswith(".sample") or not hook.is_file():
            continue

        if not hook.read_bytes().startswith(b"#!"):
            continue

        text = hook.read_text()

        if not any(
            Path("A") == Path("a") and bindir.lower() in text.lower() or bindir in text
            for bindir in bindirs
        ):
            continue

        lines = text.splitlines()

        for executable, header in headers.items():
            if executable in lines[0].lower():
                lines.insert(1, dedent(header))
                hook.write_text("\n".join(lines))
                break


@session(name="lint", python=python_versions[0])
def precommit(session: Session) -> None:
    session.install(
        "flake8",
        "flake8-bandit",
        "flake8-bugbear",
        "flake8-rst-docstrings",
        "flake8-trio",
    )

    session.run("flake8", "src", "tests")
    session.run("flake8-trio", *PY_FILES)


PY_FILES = glob("src/**/*.py", recursive=True) + glob("test/**/*.py", recursive=True)
assert PY_FILES


@session(python=python_versions[0])
def format(session: Session) -> None:
    session.install(
        "shed==2023.6.1",
    )
    session.run("shed", "--refactor", *PY_FILES)


@session(python=python_versions[0])
def safety(session: Session) -> None:
    """Scan dependencies for insecure packages."""
    requirements = session.poetry.export_requirements()
    session.install("safety")
    session.run("safety", "check", "--full-report", f"--file={requirements}")


@session(python=python_versions)
def mypy(session: Session) -> None:
    """Type-check using mypy."""
    args = session.posargs or ["src", "tests"]
    session.install(".")
    session.install("mypy", "pytest", "trio-typing", "types-tqdm")
    session.run("mypy", *args)
    if not session.posargs:
        session.run("mypy", f"--python-executable={sys.executable}", "noxfile.py")


@session(python=python_versions, reuse_venv=True)
def tests(session: Session) -> None:
    """Run the test suite."""
    session.install(".")
    session.run_always("poetry", "install", external=True)
    session.install("coverage[toml]", "pytest", "pytest-trio", "pygments")
    try:
        session.run("coverage", "run", "--parallel", "-m", "pytest", *session.posargs)
    finally:
        if session.interactive and not session.posargs:
            session.notify("coverage", posargs=[])


@session(python=python_versions[0])
def coverage(session: Session) -> None:
    """Produce the coverage report."""
    args = session.posargs or ["report"]

    session.install("coverage[toml]")

    if not session.posargs and any(Path().glob(".coverage.*")):
        session.run("coverage", "combine")

    session.run("coverage", *args)


@session(python=python_versions[0])
def typeguard(session: Session) -> None:
    """Runtime type checking using Typeguard."""
    session.install(".")
    session.install("pytest", "typeguard", "pygments")
    session.run("pytest", f"--typeguard-packages={package}", *session.posargs)


@session(python=python_versions)
def xdoctest(session: Session) -> None:
    """Run examples with xdoctest."""
    if session.posargs:
        args = [package, *session.posargs]
    else:
        args = [f"--modname={package}", "--command=all"]
        if "FORCE_COLOR" in os.environ:
            args.append("--colored=1")

    session.install(".")
    session.install("xdoctest[colors]")
    session.run("python", "-m", "xdoctest", *args)


@session(name="docs-build", python=python_versions[0])
def docs_build(session: Session) -> None:
    """Build the documentation."""
    args = session.posargs or ["docs", "docs/_build"]
    if not session.posargs and "FORCE_COLOR" in os.environ:
        args.insert(0, "--color")

    session.install(".")
    session.install("sphinx", "sphinx-click", "furo", "myst-parser")

    build_dir = Path("docs", "_build")
    if build_dir.exists():
        shutil.rmtree(build_dir)

    session.run("sphinx-build", *args)


@session(python=python_versions[0])
def docs(session: Session) -> None:
    """Build and serve the documentation with live reloading on file changes."""
    args = session.posargs or ["--open-browser", "docs", "docs/_build"]
    session.install(".")
    session.install("sphinx", "sphinx-autobuild", "sphinx-click", "furo", "myst-parser")

    build_dir = Path("docs", "_build")
    if build_dir.exists():
        shutil.rmtree(build_dir)

    session.run("sphinx-autobuild", *args)