exit code in bash prompt

.bashrc

ps1_prompt() {
    local ps1_exit=$?

    if [ $ps1_exit -eq 0 ]; then
        #ps1_status=`echo -e "\[\033[32m\]"'\$'"\[\033[0m\]"`
        ps1_status='\$'
    else
        ps1_status=`echo -e "\[\033[1;31m\]"'\$'"\[\033[0m\]"`

    fi

    ps1_git=''

    PS1="${debian_chroot:+($debian_chroot)}\u@\h:\[\033[01;34m\]\w\[\033[00m\]${ps1_git}${ps1_status} "
    PS1="\[\e[1;31m\][\u@\h \w] (${ps1_exit}) \$\[\e[0m\] "
}

# preserve earlier PROMPT_COMMAND entries...
PROMPT_COMMAND="ps1_prompt;$PROMPT_COMMAND"