Use Dulwich to retrieve the full commit hash and dirty state of a Git work tree

get_version_with_gitrev.py

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
# vim: set autoindent smartindent softtabstop=4 tabstop=4 shiftwidth=4 expandtab:
import functools
import os
from contextlib import suppress
from dulwich import porcelain
from dulwich.errors import NotGitRepository

__version__ = "0.1.2"


@functools.cache
def get_version(repo=None):
    repo = repo or os.getcwd()
    with suppress(NotGitRepository):
        revid = None
        with porcelain.open_repo_closing(repo) as r:
            revid = r.head().decode("ascii")
        status = porcelain.status(repo=repo, untracked_files="no")
        dirtymark = "+" if status.staged["add"] or status.staged["delete"] or status.staged["modify"] or status.unstaged else ""
        return f"{__version__}~git:{revid}{dirtymark}"
    return __version__


if __name__ == "__main__":
    print(get_version())

Goal here is to "enrich" the hardcoded version number with information from the Git repo and a dirty marker for the work tree.