Check if /etc is clean before logout

.bash_logout

# Check /etc git is clean (from etckeeper)
if sudo -n true 2> /dev/null; then  # if we can run sudo without prompting
    cd /etc/
    if [[ `sudo git status --porcelain` ]]; then    # if git is not clean
        echo -e "\033[0;31mPlease commit changes in /etc first\033[0m"
        exec sudo bash -l   # start a new bash (i.e. abort logout) as root in /etc
        # the login bash is now running as root
    fi
fi