#!/bin/bash


real_file=/etc/sudoers
tmp_file=$(mktemp /tmp/XXXXXXX)

# Backup sudoers file
cp ${real_file} ${tmp_file}

# Add Command Aliases
add_cmd_alias() {
    sudo_file=$1
    {% for sudo_name, sudo_cmd in sudo_alias.items %}
        {% if sudo_name != 'ALL' %}
        if $(grep '^Cmnd_Alias \<{{ sudo_name }}\>' ${sudo_file} &> /dev/null); then
            sed -i 's@^Cmnd_Alias \<{{ sudo_name }}\>.*@Cmnd_Alias {{ sudo_name }} = {{ sudo_cmd }}@g' ${sudo_file}
        else
            echo "Cmnd_Alias {{ sudo_name }} = {{ sudo_cmd }}" >> ${sudo_file}
        fi
        {% endif %}
    {% endfor %}
}


# Add Command Aliases to role
add_role_chosen() {
    sudo_file=$1
    {% for user, alias in sudo_user.items %}
        if $(grep '^{{ user }}\>' ${sudo_file} &> /dev/null); then
            sed -i 's@^{{ user }}\>.*@{{ user }} ALL = (root) NOPASSWD: {{ alias }}@g' ${sudo_file}
        else
            echo "{{ user }} ALL = (root)  NOPASSWD: {{ alias }}"  >> ${sudo_file}
        fi
    {% endfor %}
}


check_syntax(){
    visudo -c -f $1
}

cp $real_file $tmp_file && add_cmd_alias $tmp_file && add_role_chosen $tmp_file || exit 1
check_syntax $tmp_file && add_cmd_alias $real_file && add_role_chosen $real_file && rm -f $tmp_file || exit 2
check_syntax $real_file