contrib/packaging/packaging.py

nodemap: add a todo list for getting out of experimental

This is all the requirement I can think off. More might be added as they emerge.

The first ones are mostly simple technical matters that will be taken care of
soon. The question about the "status" of the persistent nodemap and the revlogs
that will use it requires more discussion and thinking.

Differential Revision: https://phab.mercurial-scm.org/D8181

#!/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)