Git auto user. Switch git user/email based on active directory

.gitautouser

#!/usr/bin/env python
"""
Checks and sets git username and email based on dir root matching

1. Add the following to ~/.bashrc

    function cd {
        builtin cd "$@"

        if [ -d ".git" ] ; then
          $HOME/.gitautouser
        fi
    }

2. Save this Python file to ~/.gitautouser and run `chmod +rx ~/.gitautouser`
"""
import subprocess


PROJECTS_DIR = lambda x: '/home/ptysoe/Projects/{}'.format(x)
GIT_USER_NAME = 'Phil Tysoe'

USER_CONFIG = {
    # path (matched with startswith()): (username, email)
    PROJECTS_DIR('work'): (GIT_USER_NAME, 'phil@work.com'),
    PROJECTS_DIR('personal'): (GIT_USER_NAME, 'phil@personal.com'),
}


def check_config(command_arg, value):
    command = ['git', 'config', command_arg]
    output = subprocess.check_output(command).replace('\n', '')
    if output != value:
        subprocess.check_output(command + [value])
        new_value = subprocess.check_output(command).replace('\n', '')
        print('git {} updated from {} -> {}'.format(
            command_arg,
            output,
            new_value
        ))


def main():
    current_dir = subprocess.check_output('pwd')
    for path_root in USER_CONFIG.keys():
        if current_dir.startswith(path_root):
            username, email = USER_CONFIG[path_root]
            check_config('user.name', username)
            check_config('user.email', email)


if __name__ == '__main__':
    main()