.pretty_print

have_tty()
{
    # return success if both stdin and stdout are tty
    local ret=1
    if [[ -t 0 && -t 1 ]] ; then
        ret=0
    fi
    return "$ret"
}

# some colors
_NC=""

_RED=""
_BRED=""
_URED=""

_GREEN=""
_BGREEN=""
_UGREEN=""

_YELLOW=""
_BYELLOW=""
_UYELLOW=""

_BLUE=""
_BBLUE=""

_PURPLE=""
_BPURPLE=""
_UPURPLE=""

_CYAN=""
_BCYAN=""
_UCYAN=""

_BOLD=""
_UND=""

if have_tty ; then
    _NC='\033[0m'

    _RED='\033[0;31m'
    _BRED='\033[1;31m'
    _URED='\033[4;31m'

    _GREEN='\033[0;32m'
    _BGREEN='\033[1;32m'
    _UGREEN='\033[4;32m'

    _YELLOW='\033[0;33m'
    _BYELLOW='\033[1;33m'
    _UYELLOW='\033[4;33m'

    _BLUE='\033[0;34m'
    _BBLUE='\033[1;34m'

    _PURPLE='\033[0;35m'
    _BPURPLE='\033[1;35m'
    _UPURPLE='\033[4;35m'

    _CYAN='\033[0;36m'
    _BCYAN='\033[1;36m'
    _UCYAN='\033[4;36m'

    _BOLD='\033[1m'
    _UND='\033[4m'
fi

print_bold() {
    echo -e "${_BOLD}${*}${_NC}"
}
print_und() {
    echo -e "${_UND}${*}${_NC}"
}
print_boldund() {
    echo -e "${_BOLD}${_UND}${*}${_NC}"
}
print_red() {
    echo -e "${_RED}${*}${_NC}"
}
print_bred() {
    echo -e "${_BRED}${*}${_NC}"
}
print_green() {
    echo -e "${_GREEN}${*}${_NC}"
}
print_bgreen() {
    echo -e "${_BGREEN}${*}${_NC}"
}
print_yellow() {
    echo -e "${_YELLOW}${*}${_NC}"
}
print_byellow() {
    echo -e "${_BYELLOW}${*}${_NC}"
}
print_blue() {
    echo -e "${_BLUE}${*}${_NC}"
}
print_bblue() {
    echo -e "${_BBLUE}${*}${_NC}"
}
print_purple() {
    echo -e "${_PURPLE}${*}${_NC}"
}
print_bpurple() {
    echo -e "${_BPURPLE}${*}${_NC}"
}