setup.py

"""Setup script for git-version-utils.

The package version is determined dynamically from git tags.
Run `python tools/write_version.py` before building to generate
src/git_version/_version.py with the correct version.

The version in pyproject.toml is declared as dynamic and resolved
from git_version._version.__version__ at build time.
"""

import os
import re
from pathlib import Path

from setuptools import setup


def get_version() -> str:
    """Get the package version from the generated _version.py or from git.

    Priority:
    1. src/git_version/_version.py (generated by tools/write_version.py)
    2. GIT_VERSION_UTILS_VERSION environment variable
    3. pyproject.toml fallback (0.0.0)
    """
    # Try _version.py first (generated by tools/write_version.py)
    version_py = Path(__file__).parent / "src" / "git_version" / "_version.py"
    if version_py.exists():
        ns: dict[str, str] = {}
        exec(version_py.read_text(), ns)
        if "__version__" in ns:
            return ns["__version__"]

    # Try environment variable
    env_version = os.environ.get("GIT_VERSION_UTILS_VERSION")
    if env_version:
        return env_version

    # Fallback to pyproject.toml
    pyproject = Path(__file__).parent / "pyproject.toml"
    if pyproject.exists():
        content = pyproject.read_text()
        match = re.search(r'^version\s*=\s*"([^"]+)"', content, re.MULTILINE)
        if match:
            return match.group(1)

    return "0.0.0"


if __name__ == "__main__":
    setup(version=get_version())