next-version

#!/usr/bin/env python3

import subprocess

MAJOR_VERSION = 2
MINOR_VERSION = 1


def get_latest_version() -> (int, int, int):
    """
    Gets latest version based on Git Tags.
    """
    proc = subprocess.run(['git', 'tag'], stdout=subprocess.PIPE)

    versions = sorted(map(lambda version: tuple(int(sub)
                                                for sub
                                                in version.split('.')),
                          proc.stdout.decode().splitlines()))
    return versions[-1]


if __name__ == '__main__':
    major, minor, build = get_latest_version()

    if major != MAJOR_VERSION or minor != MINOR_VERSION:
        new_build = 0
    else:
        new_build = build + 1

    print(f"{MAJOR_VERSION}.{MINOR_VERSION}.{new_build}")