Update all Git repositories in the current folder

git-update-all.py

#!/usr/bin/env python
"""
Update all Git repos in the current directory. Fast-forward only, no merge commits.

Copyright (c) 2018 Yuriy Guts

usage: git-update-all.py
"""

from __future__ import division, print_function

import os
import subprocess
import sys
import traceback


def is_git_repo(path):
    return os.path.isdir(path) and os.path.isdir(os.path.join(path, '.git'))


def run_command(command):
    print('> Running:', command)
    subprocess.call(command, shell=True)


def update_repo(repo):
    print('-' * 30)
    print('Updating {}...'.format(os.path.basename(repo)))

    os.chdir(repo)
    run_command('git remote update -p && git merge --ff-only @{u}')
    os.chdir('..')

    print()


def main():
    workdir = os.getcwd()
    repos = [
        os.path.join(workdir, dir_entry)
        for dir_entry in os.listdir(workdir)
        if is_git_repo(dir_entry)
    ]

    for repo in repos:
        try:
            update_repo(repo)
        except Exception:
            print('ERROR while updating repo')
            traceback.print_exc()
            sys.exit(1)


if __name__ == '__main__':
    main()