git-prompt.sh

# version __git_ps1 that won't invoke any git commands, but might be a little disk intensive in deep repositories

function __git_ps1() {
    local P="";

    until [[ `readlink -f "$P"` = "/" ]]; do
        if [[ -d "$P.git/" ]]; then
            P="$P.git/";
            local B=`cat ${P}HEAD | sed -re 's/.+\///g'`;

            if [[ -d "${P}rebase-merge/" ]]; then
                if [[ -f "${P}rebase-merge/interactive" ]]; then
                    B="$B|MERGING-i";
                else
                    B="$B|MERGING-m";
                fi
            else
                if [ -d "${P}rebase-apply" ]; then
                    if [ -f "${P}rebase-apply/rebasing" ]; then
                        B="$B|REBASE"
                    elif [ -f "${P}rebase-apply/applying" ]; then
                        B="$B|AM"
                    else
                        B="$B|AM/REBASE"
                    fi
                elif [ -f "${P}MERGE_HEAD" ]; then
                    B="$B|MERGING"
                elif [ -f "${P}CHERRY_PICK_HEAD" ]; then
                    B="$B|CHERRY-PICKING"
                elif [ -f "${P}REVERT_HEAD" ]; then
                    B="$B|REVERTING"
                elif [ -f "${P}BISECT_LOG" ]; then
                    B="$B|BISECTING"
                fi
            fi

            printf "$1" $B;
            P="/";
        else
            P="$P../";
        fi
    done
}