.bash_prompt

#!/bin/bash
#
# Sets prompt dependent on given number of colors.

case $1 in
    ''|*[!0-9]*) return ;;
esac

# Turn off all attributes
rs="\[$(tput sgr0)\]"

# Turn on bold (extra bright) mode
if tput bold > /dev/null 2>&1; then
    bold="\[$(tput bold)\]"
fi

if [ "$1" -ge 256 ]; then
    r="\[$(tput setaf 167)\]"
    g="\[$(tput setaf 142)\]"
    y="\[$(tput setaf 214)\]"
    b="\[$(tput setaf 109)\]"
elif [ "$1" -ge 8 ]; then
    r="\[$(tput setaf 1)\]"
    g="\[$(tput setaf 2)\]"
    y="\[$(tput setaf 3)\]"
    b="\[$(tput setaf 4)\]"
fi

# Prints exit code if there was an error.
function err_status {
    local ec=$?
    [ $ec -ne 0 ] && echo "$ec "
}

# Primary prompt.
export PS1="\n${bold}${g}\u@\h ${y}\w\n${r}\$(err_status)${rs}\$ "
# Secondary prompt (e.g. multi-line command).
export PS2="${bold}${b}>${rs} "

unset rs bold r g y b