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import os
import shutil

import nox


def tests_impl(session, extras="socks,secure,brotli"):
    # Install deps and the package itself.
    session.install("-r", "dev-requirements.txt")
    session.install(".[{extras}]".format(extras=extras))

    # Show the pip version.
    session.run("pip", "--version")
    # Print the Python version and bytesize.
    session.run("python", "--version")
    session.run("python", "-c", "import struct; print(struct.calcsize('P') * 8)")
    # Print OpenSSL information.
    session.run("python", "-m", "OpenSSL.debug")

    # Inspired from https://github.com/pyca/cryptography
    # We use parallel mode and then combine here so that coverage.py will take
    # the paths like .tox/pyXY/lib/pythonX.Y/site-packages/urllib3/__init__.py
    # and collapse them into src/urllib3/__init__.py.

    session.run(
        "coverage",
        "run",
        "--parallel-mode",
        "-m",
        "pytest",
        "-r",
        "a",
        "--tb=native",
        "--no-success-flaky-report",
        *(session.posargs or ("test/",)),
        env={"PYTHONWARNINGS": "always::DeprecationWarning"}
    )
    session.run("coverage", "combine")
    session.run("coverage", "report", "-m")
    session.run("coverage", "xml")


@nox.session(python=["2.7", "3.5", "3.6", "3.7", "3.8", "3.9", "pypy"])
def test(session):
    tests_impl(session)


@nox.session(python=["2", "3"])
def google_brotli(session):
    # https://pypi.org/project/Brotli/ is the Google version of brotli, so
    # install it separately and don't install our brotli extra (which installs
    # brotlipy).
    session.install("brotli")
    tests_impl(session, extras="socks,secure")


@nox.session(python="2.7")
def app_engine(session):
    session.install("-r", "dev-requirements.txt")
    session.install(".")
    session.run(
        "coverage",
        "run",
        "--parallel-mode",
        "-m",
        "pytest",
        "-r",
        "sx",
        "test/appengine",
        *session.posargs
    )
    session.run("coverage", "combine")
    session.run("coverage", "report", "-m")
    session.run("coverage", "xml")


@nox.session()
def blacken(session):
    """Run black code formatter."""
    session.install("black")
    session.run("black", "src", "dummyserver", "test", "noxfile.py", "setup.py")

    lint(session)


@nox.session
def lint(session):
    session.install("flake8", "black")
    session.run("flake8", "--version")
    session.run("black", "--version")
    session.run(
        "black", "--check", "src", "dummyserver", "test", "noxfile.py", "setup.py"
    )
    session.run("flake8", "setup.py", "docs", "dummyserver", "src", "test")


@nox.session
def docs(session):
    session.install("-r", "docs/requirements.txt")
    session.install(".[socks,secure,brotli]")

    session.chdir("docs")
    if os.path.exists("_build"):
        shutil.rmtree("_build")
    session.run("sphinx-build", "-W", ".", "_build/html")