.bash_git_prompt

# From stconfig's .gitrc_st

COLOR_RESET="\[\033[0;39;49m\]"
COLOR_BRANCH="\[\033[0;1;32;44m\]"
COLOR_REPO="\[\033[0;1;33;44m\]"
COLOR_WORKDIR="\[\033[0;1;33;42m\]"
MOD_GLYPH="*"
STATE_GLYPH="|"
PS1_GLYPH="\$"

# shamelessly ripped off from http://github.com/rtomayko/git-sh/tree/master
# ... and Ubuntu's __git_ps1() in /etc/bash_completion.d/git
_git_prompt_color() {
    local g r b rel loc mod

    g="$(git rev-parse --git-dir 2>/dev/null)"
    if [ -z $g ]; then
        export BASH_GIT_BRANCH=""
        PS1="\u@\h:\w$PS1_GLYPH "
        return
    fi

    if [ -d "$g/../.dotest" ]
    then
        if test -f "$g/../.dotest/rebasing"
        then
            r="${STATE_GLYPH}REBASE"
        elif test -f "$g/../.dotest/applying"
        then
            r="${STATE_GLYPH}AM"
        else
            r="${STATE_GLYPH}AM/REBASE"
        fi
        b="$(git symbolic-ref HEAD 2>/dev/null)"
    elif [ -f "$g/.dotest-merge/interactive" ]
    then
        r="${STATE_GLYPH}REBASE-i"
        b="$(cat "$g/.dotest-merge/head-name")"
    elif [ -d "$g/.dotest-merge" ]
    then
        r="${STATE_GLYPH}REBASE-m"
        b="$(cat "$g/.dotest-merge/head-name")"
    elif [ -f "$g/MERGE_HEAD" ]
    then
        r="${STATE_GLYPH}MERGING"
        b="$(git symbolic-ref HEAD 2>/dev/null)"
    else
        if [ -f "$g/BISECT_LOG" ]
        then
            r="${STATE_GLYPH}BISECTING"
        fi
        if ! b="$(git symbolic-ref HEAD 2>/dev/null)"
        then
            if ! b="$(git describe --exact-match HEAD 2>/dev/null)"
            then
                b="$(cut -c1-7 "$g/HEAD")..."
            fi
        fi
    fi

    b="${b##refs/heads/}" # make it a pretty name
    export BASH_GIT_BRANCH="$b"

    mod=`git ls-files --modified --deleted --others --exclude-standard 2>/dev/null | head -1`
    if [ ! -z "$mod" ]; then
        r="${MOD_GLYPH}$r"
    fi

    rel=$(git rev-parse --show-prefix 2>/dev/null)
    rel="${rel%/}"
    loc="${PWD%/$rel}"

    PS1="\u@\h:${COLOR_BRANCH}${b}${r}${COLOR_RESET}!${COLOR_REPO}${loc/*\/}${COLOR_RESET}${COLOR_WORKDIR}${rel:+/$rel}${COLOR_RESET}${PS1_GLYPH} "
}

# write this after source-ing this file
#PROMPT_COMMAND=_git_prompt_color