_own_version_helper.py

"""
this module is a hack only in place to allow for setuptools
to use the attribute for the versions

it works only if the backend-path of the build-system section
from pyproject.toml is respected
"""

from __future__ import annotations

import logging

from typing import Callable

from setuptools import build_meta as build_meta

from setuptools_scm import Configuration
from setuptools_scm import _types as _t
from setuptools_scm import get_version
from setuptools_scm import git
from setuptools_scm import hg
from setuptools_scm.fallbacks import parse_pkginfo
from setuptools_scm.version import ScmVersion
from setuptools_scm.version import get_local_node_and_date
from setuptools_scm.version import guess_next_dev_version

log = logging.getLogger("setuptools_scm")
# todo: take fake entrypoints from pyproject.toml
try_parse: list[Callable[[_t.PathT, Configuration], ScmVersion | None]] = [
    parse_pkginfo,
    git.parse,
    hg.parse,
    git.parse_archival,
    hg.parse_archival,
]


def parse(root: str, config: Configuration) -> ScmVersion | None:
    for maybe_parse in try_parse:
        try:
            parsed = maybe_parse(root, config)
        except OSError as e:
            log.warning("parse with %s failed with: %s", maybe_parse, e)
        else:
            if parsed is not None:
                return parsed
    return None


def scm_version() -> str:
    return get_version(
        relative_to=__file__,
        parse=parse,
        version_scheme=guess_next_dev_version,
        local_scheme=get_local_node_and_date,
    )


version: str


def __getattr__(name: str) -> str:
    if name == "version":
        global version
        version = scm_version()
        return version
    raise AttributeError(name)