# get current status of git repo
function __prompt_parse_git_dirty() {
    git_status=$(git status 2>&1 | tee)
    dirty=$(echo -n "${git_status}" 2> /dev/null | grep "modified:" &> /dev/null; echo "$?")
    untracked=$(echo -n "${git_status}" 2> /dev/null | grep "Untracked files" &> /dev/null; echo "$?")
    ahead=$(echo -n "${git_status}" 2> /dev/null | grep "Your branch is ahead of" &> /dev/null; echo "$?")
    newfile=$(echo -n "${git_status}" 2> /dev/null | grep "new file:" &> /dev/null; echo "$?")
    renamed=$(echo -n "${git_status}" 2> /dev/null | grep "renamed:" &> /dev/null; echo "$?")
    deleted=$(echo -n "${git_status}" 2> /dev/null | grep "deleted:" &> /dev/null; echo "$?")
    bits=''
    if [ ${renamed} -eq 0 ]; then
        bits=">${bits}"
    fi
    if [ ${ahead} -eq 0 ]; then
        bits="*${bits}"
    fi
    if [ ${newfile} -eq 0 ]; then
        bits="+${bits}"
    fi
    if [ ${untracked} -eq 0 ]; then
        bits="?${bits}"
    fi
    if [ ${deleted} -eq 0 ]; then
        bits="x${bits}"
    fi
    if [ ${dirty} -eq 0 ]; then
        bits="!${bits}"
    fi
    if [ -z "$bits" ]; then
        echo ""
    else
        echo " ${bits}"
    fi
}

# get current branch in git repo
function __prompt_parse_git_branch() {
    git_branch=`git branch 2> /dev/null | sed -e '/^[^*]/d' -e 's/* \(.*\)/\1/'`
    if [ -z "${git_branch}" ]; then
        echo ""
    else
        git_stat=$(__prompt_parse_git_dirty)
        echo "[${git_branch}${git_stat}]"
    fi
}

# Display return value only when non-zero
function __prompt_nonzero_return() {
    RETVAL=$?
    [ $RETVAL -ne 0 ] && echo "[$RETVAL]"
}

export PS1="\e[31m\`__prompt_nonzero_return\`\e[m[\[\e[32m\]\u\[\e[m\]@\[\e[34m\]\h\[\e[36m\] \w\[\e[m\]]\e[35m\`__prompt_parse_git_branch\`\e[m\n42sh$ "