Bash PS1 for git

.bash_git.sh

exists() {
    if [ -z "$1" ]; then
        return 99;
    fi

    type -t "$1" 2>&1 1>/dev/null
}

if ! exists _command && ! shopt -oq posix; then
    if [ -f /etc/bash_completion ]; then
        . /etc/bash_completion
    elif exists brew && [ -f $(brew --prefix)/etc/bash_completion ]; then #homebrew
        . $(brew --prefix)/etc/bash_completion
        if [ -f /usr/local/etc/bash_completion.d/git-completion.bash ]; then
            . /usr/local/etc/bash_completion.d/git-completion.bash
        else
            logger -t homedir "Cannot find git bash completion, try installing git-core+bash_completion"
        fi
    fi
fi

# set a fancy prompt (non-color, unless we know we "want" color)
case "$TERM" in
    xterm-color) color_prompt=yes;;
esac

if [ -n "$force_color_prompt" ]; then
    if [ -x /usr/bin/tput ] && tput setaf 1 >&/dev/null; then
    # We have color support; assume it's compliant with Ecma-48
    # (ISO/IEC-6429). (Lack of such support is extremely rare, and such
    # a case would tend to support setf rather than setaf.)
    color_prompt=yes
    else
    color_prompt=
    fi
fi

if [ "$color_prompt" = "yes" ]; then
    if exists __git_ps1; then
        PS1='${debian_chroot:+($debian_chroot)}\[\033[01;32m\]\u@\h\[\033[00m\]:\[\033[01;34m\]\w\[\033[00m\]$(__git_ps1 " \[\e[0;36m\](%s)\[\e[0m\]")\$ '
    else
        PS1='${debian_chroot:+($debian_chroot)}\[\033[01;32m\]\u@\h\[\033[00m\]:\[\033[01;34m\]\w\[\033[00m\]\$ '
    fi
else
    if exists __git_ps1; then
        PS1='${debian_chroot:+($debian_chroot)}\u@\h:\w$(__git_ps1 " (%s)")\$ '
    else
        PS1='${debian_chroot:+($debian_chroot)}\u@\h:\w\$ '
    fi
fi
unset color_prompt force_color_prompt