build

#!/usr/bin/env python3
from __future__ import annotations

import argparse
import os.path
import subprocess
from typing import NoReturn

HERE = os.path.abspath(os.path.dirname(__file__))
TOOLS = os.path.join(HERE, 'tools')
DOCKER_RUN = os.path.join(HERE, 'docker-run')


def _gpg_volumes() -> list[str]:
    def _gpg(f: str, *, home: str = os.path.expanduser('~')) -> str:
        return os.path.join(home, '.gnupg', f)

    for paths in (
        ('pubring.kbx', 'private-keys-v1.d'),  # new format
        # TODO: deadsnakes GHA still uses this
        ('pubring.gpg', 'secring.gpg'),  # old format
    ):
        if all(os.path.exists(_gpg(p)) for p in paths):
            return [
                f'--volume={_gpg(p)}:{_gpg(p, home="/root")}:ro'
                for p in paths
            ]
    else:
        raise AssertionError('no gpg keys found?')


def main() -> NoReturn:
    parser = argparse.ArgumentParser()
    parser.add_argument('--source', action='store_true')
    parser.add_argument('--git-build', action='store_true')
    args = parser.parse_args()

    print('*' * 79)
    print('Parsing target distribution')
    print('*' * 79)
    dist = subprocess.check_output((
        TOOLS, 'dpkg-parsechangelog', '--show-field=distribution',
    )).decode().strip()

    print('*' * 79)
    print('Running build (results will be in ../dist)')
    print('*' * 79)
    os.makedirs('../dist', exist_ok=True)
    pwd = os.getcwd()
    gbp_args = '' if args.source else '-us -uc'
    gbp_args += (
        '' if not args.git_build else
        ' --git-pristine-tar-commit '
        "--git-upstream-tag='deadsnakes/v%(version%~%_)s'"
    )
    extra = '--git-builder="debuild -S -sa"' if args.source else ''
    prog = (
        f'chmod 700 ~/.gnupg && '
        f'apt-get update -qq && '
        f'mk-build-deps --install --remove --tool "apt-get --yes" /code/debian/control && '  # noqa: E501
        f'cp -r /code /tmp && '
        f'cd /tmp/code && '
        f'git clean -fxfd && '
        f'gbp buildpackage {gbp_args} --git-pristine-tar --git-debian-branch=ubuntu/{dist} {extra} && '  # noqa
        f'find .. -maxdepth 1 -type f | xargs --replace cp {{}} /dist'
    )
    cmd = (
        DOCKER_RUN,
        *_gpg_volumes(),
        '-v', f'{pwd}:/code:ro',
        '-v', f'{pwd}/../dist:/dist:rw',
        f'ghcr.io/deadsnakes/{dist}', 'bash', '-euxc', prog,
    )
    os.execvp(cmd[0], cmd)


if __name__ == '__main__':
    raise SystemExit(main())