.bash_ps1

if [[ $- == *i* ]] ; then

    # some people may prefer this off, so lets handle it nicely
    function use_extglob {
        # it's defaulting to on, leave it as is
        if [ -z "$extglob_off" ] ; then return ; fi

        # else we're either turning it on to use it, or turning it off to return to prefered setting
        if [ "$1" = "on" ] ; then shopt -s extglob ; else shopt -u extglob ; fi
    }

    # what branch is this?
    function git_branch {
        foo=$(git branch --no-color 2> /dev/null | sed -e '/^[^*]/d' -e 's/* \(.*\)/\1/')
        if [ "$foo" != "" ] ; then foo="[$foo]" ; fi
        echo $foo
    }

    # bash does not have a builtin version of this, so time to do it the long winded way :/
    function expand_ps1 {
        if [[ "$PWD" =~ ^$HOME ]] ; then pwd=$( echo $PWD | sed "s:^${HOME}:~:") ; else pwd="$PWD" ; fi
        use_extglob on
        sane_PS1="${PS1//\\\[*(\\[^]]|[^\\])\\\]/}"
        use_extglob off
        sane_PS1="${sane_PS1//\\t/xx:xx:xx}"
        sane_PS1="${sane_PS1//\\u/$USER}"
        sane_PS1="${sane_PS1//\\h/${HOSTNAME%%.*}}"
        sane_PS1="${sane_PS1//\\w/$pwd}"
        sane_PS1="${sane_PS1/\$(git_branch)/$(git_branch)}"
        sane_PS1="${sane_PS1/\\n$/}"
    }

    function prompt_command {
        # store the state of the extglob shell option (and then either act on it or not in the use_extglob function)
        shopt -q extglob || extglob_off=1

        # expand the PS1, setting sane_PS1
        expand_ps1

        # COLUMNS only gets set on a SIGWINCH, which doesn't happen on remote shells, fudge
        # around it
        if [ -z "$COLUMNS" ] ; then cols="$(tput col)" ; else cols="${COLUMNS}" ; fi

        # if the expanded PS1 is greater than screen size, just set it to "-"
        if [ "${#sane_PS1}" -gt "$cols" ] ; then
            fill="-"

        # else we need to calc how big to make it
        else

            # create a $fill of all screen width minus the time string and a space:
            fillsize="$(( $cols - ${#sane_PS1} + 3 ))"

            # echo $sane_PS1 | hexdump -C
            # perl -e "print 'sane_PS1: ' . length('$sane_PS1') . \" - $sane_PS1\n\";"
            # echo "Working with fillsize of $fillsize, $cols ${#sane_PS1}"

            fill=" "
            while [ "$fillsize" -gt "0" ]
            do
                fill="${fill}-" # fill with underscores to work on
                let fillsize=${fillsize}-1
            done
            fill="${fill} "
        fi
    }

    # are we on a color-capable TERM?
    color_term="$(tput colors)"

    if [ "$color_term" -gt "0" ] ; then
        res="\[$(tput sgr0)\]"
        und="\[$(tput smul)\]"
        bol="\[$(tput bold)\]"
        bli="\[$(tput blink)\]"

        # might need this for bold
        # bol="\[$(tput smso)\]"

        col0="\[$(tput setaf 0)\]" # black
        col1="\[$(tput setaf 1)\]" # red
        col2="\[$(tput setaf 2)\]" # green
        col3="\[$(tput setaf 3)\]" # yellow
        col4="\[$(tput setaf 4)\]" # blue
        col5="\[$(tput setaf 5)\]" # magenta
        col6="\[$(tput setaf 6)\]" # cyan
        col7="\[$(tput setaf 7)\]" # white
    fi

    prom='$ '
    usercol=$col5

    # if I am root? set different username and prompt (# vs $)
    if [ "$UID" = "0" ]; then
        usercol=$bol$col1
        prom='# '
    fi

    # Set the prompt
    PS1="${bol}${col7}(${res}${usercol}\u@${res}${col2}\h${bol}${col7}${bol})${res}-${bol}(${res}${col6}\w${bol}${col7})${col5}\$(git_branch)${res}"

    # Modify for xterms to set the title bar too
    if [ "$TERM" = 'xterm-color' -o "$TERM" = 'xterm' ] ; then
        PS1="\[\033]0;[\h] \w\007\]$PS1"
    fi

    OLD_PS1="$PS1"
    PS1="$OLD_PS1"'$fill'"${bol}(${res}\t${bol})${res}\n${prom}"

    PROMPT_COMMAND=prompt_command
fi