My Custom Bash Prompt

bashprompt

# Make a bash prompt that looks like this:
# λ directory [master !?] $

# get current branch in git repo
function parse_git_branch() {

    BRANCH=`git branch 2> /dev/null | sed -e '/^[^*]/d' -e 's/* \(.*\)/\1/'`

    if [ ! "${BRANCH}" == "" ]; then
        STAT=`parse_git_dirty`
        echo "[${BRANCH}${STAT}]"
    else
        echo ""
    fi
}

# get current status of git repo
function parse_git_dirty {

    status=`git status 2>&1 | tee`
    dirty=`echo -n "${status}" 2> /dev/null | grep "modified:" &> /dev/null; echo "$?"`
    untracked=`echo -n "${status}" 2> /dev/null | grep "Untracked files" &> /dev/null; echo "$?"`
    ahead=`echo -n "${status}" 2> /dev/null | grep "Your branch is ahead of" &> /dev/null; echo "$?"`
    newfile=`echo -n "${status}" 2> /dev/null | grep "new file:" &> /dev/null; echo "$?"`
    renamed=`echo -n "${status}" 2> /dev/null | grep "renamed:" &> /dev/null; echo "$?"`
    deleted=`echo -n "${status}" 2> /dev/null | grep "deleted:" &> /dev/null; echo "$?"`
    bits=''

    if [ "${renamed}" == "0" ]; then
        bits=">${bits}"
    fi

    if [ "${ahead}" == "0" ]; then
        bits="*${bits}"
    fi

    if [ "${newfile}" == "0" ]; then
        bits="+${bits}"
    fi

    if [ "${untracked}" == "0" ]; then
        bits="?${bits}"
    fi

    if [ "${deleted}" == "0" ]; then
        bits="x${bits}"
    fi

    if [ "${dirty}" == "0" ]; then
        bits="!${bits}"
    fi

    if [ ! "${bits}" == "" ]; then
        echo " ${bits}"
    else
        echo ""
    fi
}

export PS1="λ \[\e[36m\]\W\[\e[m\] \[\e[31m\]\`parse_git_branch\`\[\e[m\] \\$ "