function _ps_name_and_server {
    echo "`whoami`@`hostname -s`"
}

function _ps_git_branch_and_status {
    _GIT_STATUS="`git status --porcelain 2>/dev/null`"
    if [ $? -eq 0 ];then
        _GIT_DIRTY=""
        if [ "$_GIT_STATUS" != "" ];then
            _GIT_DIRTY="*"
        fi
        _GIT_BRANCH="`git branch --no-color | grep '*' | cut -d ' ' -f 2`"

        echo " $_GIT_BRANCH$_GIT_DIRTY"
    else
        echo ""
    fi
}

function _ps_virtual_env {
    if [ "$VIRTUAL_ENV" != "" ];then
        echo " `basename "$VIRTUAL_ENV"`"
    fi
}

function _ps_prompt {
    # regular colors
    local K="\[\033[0;30m\]"    # black
    local R="\[\033[0;31m\]"    # red
    local G="\[\033[0;32m\]"    # green
    local Y="\[\033[0;33m\]"    # yellow
    local B="\[\033[0;34m\]"    # blue
    local M="\[\033[0;35m\]"    # magenta
    local C="\[\033[0;36m\]"    # cyan
    local W="\[\033[0;37m\]"    # white

    # emphasized (bolded) colors
    local BK="\[\033[1;30m\]"
    local BR="\[\033[1;31m\]"
    local BG="\[\033[1;32m\]"
    local BY="\[\033[1;33m\]"
    local BB="\[\033[1;34m\]"
    local BM="\[\033[1;35m\]"
    local BC="\[\033[1;36m\]"
    local BW="\[\033[1;37m\]"

    # reset
    local RESET="\[\033[0;37m\]"

    local HOST="$RESET@$BB\h"
    if [ -z "$SSH_CONNECTION" ];then
        HOST=""
    fi

    echo "$Y\u$HOST $BG\w$C$(_ps_virtual_env)$M$(_ps_git_branch_and_status) $Y\$$RESET "
}

PS1=$(_ps_prompt)
PROMPT_COMMAND='PS1=$(_ps_prompt)'