contrib/packaging/packaging.py

test-copies: move the new files in the `i` branch

The initial branch is moving some of the "same content" file around. We do the
same for the "different content" before start to implement more tests.

The new files have harmless impact of various existing tests.

Differential Revision: https://phab.mercurial-scm.org/D10054

#!/usr/bin/env python3
#
# packaging.py - Mercurial packaging functionality
#
# Copyright 2019 Gregory Szorc <[e-mail]>
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.

import os
import pathlib
import subprocess
import sys
import venv


HERE = pathlib.Path(os.path.abspath(__file__)).parent
REQUIREMENTS_TXT = HERE / "requirements.txt"
SOURCE_DIR = HERE.parent.parent
VENV = SOURCE_DIR / "build" / "venv-packaging"


def bootstrap():
    venv_created = not VENV.exists()

    VENV.parent.mkdir(exist_ok=True)

    venv.create(VENV, with_pip=True)

    if os.name == "nt":
        venv_bin = VENV / "Scripts"
        pip = venv_bin / "pip.exe"
        python = venv_bin / "python.exe"
    else:
        venv_bin = VENV / "bin"
        pip = venv_bin / "pip"
        python = venv_bin / "python"

    args = [
        str(pip),
        "install",
        "-r",
        str(REQUIREMENTS_TXT),
        "--disable-pip-version-check",
    ]

    if not venv_created:
        args.append("-q")

    subprocess.run(args, check=True)

    os.environ["HGPACKAGING_BOOTSTRAPPED"] = "1"
    os.environ["PATH"] = "%s%s%s" % (venv_bin, os.pathsep, os.environ["PATH"])

    subprocess.run([str(python), __file__] + sys.argv[1:], check=True)


def run():
    import hgpackaging.cli as cli

    # Need to strip off main Python executable.
    cli.main()


if __name__ == "__main__":
    try:
        if "HGPACKAGING_BOOTSTRAPPED" not in os.environ:
            bootstrap()
        else:
            run()
    except subprocess.CalledProcessError as e:
        sys.exit(e.returncode)
    except KeyboardInterrupt:
        sys.exit(1)