gitget allows you to get current git commit hash or tag name

gitget.py

#! /usr/bin/env python
# -*- coding: utf-8 -*-
import os, subprocess, shlex

# param 'short' for shortening hash (slice for commit hash, abbreviation for tag name)
# param 'tag and not commit' for returning tag name only
# param 'commit and not tag' for returning commit hash only
def gitget(short=False, tag=False, commit=False):
    if tag and commit : tag, commit = False, False
    # Cosntants
    devnull = open(os.devnull, 'w')
    cmd_git_tag_exact = [shlex.split('git describe --tags --exact-match --abbrev=0'), shlex.split('git describe --tags --exact-match --abbrev=1')]
    cmd_git_tag = [shlex.split('git describe --tags --abbrev=1'), shlex.split('git describe --tags --abbrev=0')]
    cmd_git_commit = shlex.split('git rev-parse HEAD')

    # Git Tag Name
    tag_name = None
    if tag: tag_name = subprocess.check_output(cmd_git_tag[short], stderr=devnull)
    try:
        success = subprocess.check_call(cmd_git_tag_exact[short], stdout=devnull, stderr=devnull) == 0
        if success: tag_name = subprocess.check_output(cmd_git_tag_exact[short], stderr=devnull)
    except subprocess.CalledProcessError:
        pass

    # Git Commit Hash
    commit_hash = subprocess.check_output(cmd_git_commit, stderr=devnull)
    if short: commit_hash = commit_hash[:7]

    if tag_name is not None: tag_name = tag_name.strip()
    if commit_hash is not None: commit_hash = commit_hash.strip()

    if tag: return tag_name
    if commit: return commit_hash
    return [tag_name, commit_hash][tag_name is None]

# Only Commit Hash
def commit_hash(short=False):
    return gitget(short=short, commit=True)

# Only Tag Name
def tag_name(short=False):
    return gitget(short=short, tag=True)

# Tag Name if exactly matches, Commit Hash otherwise
def mixed(short=False):
    return gitget(short=short)

if __name__ == '__main__':
    print('\n ===  gitget.gitget  === \n')
    for tag in [False, True]:
        for commit in [False, True]:
            for short in [False, True]:
                print('gitget(short={}, tag={}, commit={})'.format(short, tag, commit))
                print('>> ' + str(gitget(short=short, tag=tag, commit=commit)))

    print('\n ===  gitget.commit_hash  === \n')
    for short in [False, True]:
        print('gitget.commit_hash(short={})'.format(short))
        print('>> ' + str(commit_hash(short=short)))

    print('\n ===  gitget.tag_name  === \n')
    for short in [False, True]:
        print('gitget.tag_name(short={})'.format(short))
        print('>> ' + str(tag_name(short=short)))

    print('\n ===  gitget.mixed  === \n')
    for short in [False, True]:
        print('gitget.mixed(short={})'.format(short))
        print('>> ' + str(mixed(short=short)))