Script to detect if one user has root privileges

is_root.sh

#!/usr/bin/env bash

userdo=

echo Testing if you have root access!
if [[ 'root' == whoami ]]; then
    is_root=true
else
    is_root=false
fi

if [[ $is_root == false ]]; then
    userdo=$(which sudo)
    if [[ $userdo != '' ]]; then
        $userdo ls /root/ &>/dev/null && is_root=true     
    fi
fi

if [[ $is_root == true ]]; then
    echo 'Root access detected ( ͡° ͜ʖ ͡°)' 
else
    echo This script requires root access
    echo Bye!
    exit 2
fi
# User can install pkg1 pkg2
# $userdo pm -y install pkg1 pkg2