contrib/automation/automation.py

bundle2: make the "hgtagsfnodes" part advisory

This bundle2 part is about helping the client to warms its cache. There is no
reason for it to be mandatory.

So we mark it advisory.

#!/usr/bin/env python3
#
# automation.py - Perform tasks on remote machines
#
# 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-automation'


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['HGAUTOMATION_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 hgautomation.cli as cli

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


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