Print simple help with ANSI highlighting

sample_help.sh

# ANSI color codes for the console.
reset="\033[0m"
bold="\033[1m"
ital="\033[3m" # does not work on OS X

# Function used to highlight text.
function hi() {
    echo -e "$bold$@$reset"
}

function help() {
    cat | less -RX << EOF 
    
$(hi USAGE)
   $(basename $(realpath $0)) [COMMAND] [OPTIONS]

$(hi SYNOPSIS)
    Provide a short description here

$(hi COMMANDS)
    $(hi command1)   Do something
    $(hi command2)   Do something else

$(hi OPTIONS)
    $(hi -o|--option) flag me

$(hi EXAMPLES)

EOF
}

if [[ $# == 0 ]] ; then
	help
	exit
fi