ps1.sh

if [[ ! -f ~/.git-prompt.sh ]]; then
    curl -o ~/.git-prompt.sh https://raw.githubusercontent.com/git/git/master/contrib/completion/git-prompt.sh
fi

. ~/.git-prompt.sh

function get_version_ctl_branch() {
    local dir="$PWD"
    local vcs
    local nick
    while [[ "$dir" != "/" ]]; do
        for vcs in git hg svn bzr; do
            if [[ -d "$dir/.$vcs" ]] && hash "$vcs" &>/dev/null; then
                case "$vcs" in
                    git) __git_ps1 "${1:-(%s) }"; return;;
                    hg) nick=$(hg branch 2>dev/null);;
                    svn) nick=$(svn info 2>/dev/null\
                        | grep -e '^Repository Root:'\
                        | sed -e 's#.*/##');;
                    bzr)
                        local conf="${dir}/.bzr/branch/branch.conf"
                        [[ -f "$conf" ]] && nick=$(grep -E '^nickname =' "$conf" | cut -d' ' -f 3)
                        conf="${dir}/.bzr/branch/location" # colo/lightweight branch
                        [[ -z "$nick" ]] && [[ -f "$conf" ]] && nick="$(basename "$(< $conf)")"
                        [[ -z "$nick" ]] && nick="$(basename "$(readlink -f "$dir")")";;
                esac
                [[ -n "$nick" ]] && printf "${1:-(%s) }" "$nick"
                return 0
            fi
        done
        dir="$(dirname "$dir")"
    done
}

PS1_UN="\[\033[38;5;33m\]\u@\h\[\033[00m\]"
PS1_DIR="\[\033[38;5;26m\]\w\[\033[00m\]"
PS1_GIT_CUR="\[\033[0;35;49m\]\$(get_version_ctl_branch "$2")\[\033[00m\]"
PS1_LAMBDA="\[\033[38;5;173m\]λ\[\033[0;00m\]"
PS1="${PS1_UN}:${PS1_DIR} ${PS1_GIT_CUR}\n${PS1_LAMBDA} \[$(tput sgr0)\]"