Function decompress_dependencies

noxfile.py:1285–1419

(session)

@nox.session(python=False, name="decompress-dependencies")
def decompress_dependencies(session):
    if not session.posargs:
        session.error(
            "The 'decompress-dependencies' session target needs "
            "two arguments, '<platform> <arch>'."
        )
    try:
        platform = session.posargs.pop(0)
        arch = session.posargs.pop(0)
        if session.posargs:
            session.error(
                "The 'decompress-dependencies' session target only accepts "
                "two arguments, '<platform> <arch>'."
            )
    except IndexError:
        session.error(
            "The 'decompress-dependencies' session target needs "
            "two arguments, '<platform> <arch>'."
        )
    if platform == "windows":
        extension = "tar.gz"
        scripts_dir_name = "Scripts"
        pyexecutable = "python.exe"
    else:
        extension = "tar.xz"
        scripts_dir_name = "bin"
        pyexecutable = "python"
    nox_dependencies_tarball = f"nox.{platform}.{arch}.{extension}"
    nox_dependencies_tarball_path = REPO_ROOT / nox_dependencies_tarball
    if not nox_dependencies_tarball_path.exists():
        session.error(
            f"The {nox_dependencies_tarball} file "
            "does not exist. Not decompressing anything."
        )

    session_run_always(session, "tar", "xpf", nox_dependencies_tarball)
    if os.environ.get("DELETE_NOX_ARCHIVE", "0") == "1":
        nox_dependencies_tarball_path.unlink()

    session.log("Finding broken 'python' symlinks and configs under '.nox/' ...")
    # ``compress-dependencies`` archives the whole ``.nox`` tree. That tree is not
    # only per-session virtualenv folders (``ci-test-onedir``, etc.): it can also
    # contain plain files written by tooling, for example:
    #
    #   - ``.nox/.gitignore`` — tells Git to ignore generated venv files
    #   - ``.nox/CACHEDIR.TAG`` — cache-dir marker used by virtualenv and similar tools
    #
    # Those files are siblings of the venv directories. The code below must only
    # treat *directories* as virtualenvs. Otherwise we build paths like
    # ``.nox/.gitignore/Scripts`` and ``os.scandir`` raises FileNotFoundError.
    for entry in os.scandir(REPO_ROOT / ".nox"):
        if not entry.is_dir():
            continue

        venv_dir = pathlib.Path(entry.path)
        scan_path = venv_dir / scripts_dir_name
        if not scan_path.is_dir():
            # Unexpected layout; skip rather than failing the whole session.