An excellent .bashrc script for styling the bash prompt on Mac OS

.bashrc

# In order to use this script, you should copy git-prompt.sh from here...
# https://github.com/git/git/blob/master/contrib/completion/git-prompt.sh
# ... into here: /usr/local/share/bash-completion/git/git-prompt.sh

# You might consider following these commands after copying that file:
# sudo mkdir -p /usr/local/share/bash-completion/git
# sudo cat > /usr/local/share/bash-completion/git/git-prompt.sh
# (paste the contents of the file, then press Enter and then CTRL-D)
# sudo chmod -R 755 /usr/local/share/bash-completion

# ... after you've done those steps above, you should be good to go!


# If not running interactively, don't do anything
case $- in
  *i*) ;;
  *) return;;
esac

PATH=$PATH:~/bin

# don't put duplicate lines or lines starting with space in the history.
# See bash(1) for more options
HISTCONTROL=ignoreboth

export BASH_SILENCE_DEPRECATION_WARNING=1

# append to the history file, don't overwrite it
shopt -s histappend

# for setting history length see HISTSIZE and HISTFILESIZE in bash(1)
HISTSIZE=1000
HISTFILESIZE=2000

# check the window size after each command and, if necessary,
# update the values of LINES and COLUMNS.
shopt -s checkwinsize

# If set, the pattern "**" used in a pathname expansion context will
# match all files and zero or more directories and subdirectories.
#shopt -s globstar

# make less more friendly for non-text input files, see lesspipe(1)
[ -x /usr/bin/lesspipe ] && eval "$(SHELL=/bin/sh lesspipe)"

# set variable identifying the chroot you work in (used in the prompt below)
if [ -z "${debian_chroot:-}" ] && [ -r /etc/debian_chroot ]; then
  debian_chroot=$(cat /etc/debian_chroot)
fi

export EDITOR=/usb/bin/vim
export BLOCKSIZE=1k
export CLICOLOR=1
export LSCOLORS=ExFxBxDxCxegedabagacad
export TERM=xterm-256color

# set a fancy prompt (non-color, unless we know we "want" color)
case "$TERM" in
  xterm-color|*-256color) color_prompt=yes;;
esac
# uncomment for a colored prompt, if the terminal has the capability; turned
# off by default to not distract the user: the focus in a terminal window
# should be on the output of commands, not on the prompt
#force_color_prompt=yes

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

# If this is an xterm set the title to user@host:dir
case "$TERM" in
xterm*|rxvt*)
  PS1="\[\e]0;${debian_chroot:+($debian_chroot)}\u@\h: \w\a\]$PS1"
  ;;
*)
  ;;
esac

# enable color support of ls and also add handy aliases
if [ -x /usr/bin/dircolors ]; then
  test -r ~/.dircolors && eval "$(dircolors -b ~/.dircolors)" || eval "$(dircolors -b)"
  alias ls='ls --color=auto'
  #alias dir='dir --color=auto'
  #alias vdir='vdir --color=auto'
  alias grep='grep --color=auto'
  alias fgrep='fgrep --color=auto'
  alias egrep='egrep --color=auto'
fi

# colored GCC warnings and errors
#export GCC_COLORS='error=01;31:warning=01;35:note=01;36:caret=01;32:locus=01:quote=01'

# some more ls aliases
alias ll='ls -alF'
alias la='ls -A'
alias l='ls -CF'

# Add an "alert" alias for long running commands.  Use like so:
#   sleep 10; alert
alias alert='notify-send --urgency=low -i "$([ $? = 0 ] && echo terminal || echo error)" "$(history|tail -n1|sed -e '\''s/^\s*[0-9]\+\s*//;s/[;&|]\s*alert$//'\'')"'

# Alias definitions.
# You may want to put all your additions into a separate file like
# ~/.bash_aliases, instead of adding them here directly.
# See /usr/share/doc/bash-doc/examples in the bash-doc package.

if [ -f ~/.bash_aliases ]; then
  . ~/.bash_aliases
fi

# enable programmable completion features (you don't need to enable
# this, if it's already enabled in /etc/bash.bashrc and /etc/profile
# sources /etc/bash.bashrc).
if ! shopt -oq posix; then
  if [ -f /usr/share/bash-completion/bash_completion ]; then
    . /usr/share/bash-completion/bash_completion
  elif [ -f /etc/bash_completion ]; then
    . /etc/bash_completion
  fi
fi

source "/usr/local/share/bash-completion/git/git-prompt.sh"

GIT_PS1_SHOWDIRTYSTATE=1;
GIT_PS1_SHOWCOLORHINTS=1;
GIT_PS1_SHOWUNTRACKEDFILES=1;

SH_WHITE="\[\033[1;37m\]"
SH_BLUE="\[\033[1;34m\]"
SH_RED="\[\033[1;31m\]"
SH_GREEN="\[\033[1;32m\]"
SH_YELLOW="\[\033[1;33m\]"

BL_ANGLE="\342\224\224"
TL_ANGLE="\342\224\214"
HORIZ_LINE="\342\224\200"

#BATT="\$(acpi -b | awk '{print \$4}' | cut -b1-3)"
FILES_STAT="\$(ls -1 | wc -l | sed 's: ::g')"
FILES_SIZE="\$(ls -lah | grep -m 1 total | sed 's/1:total //')b"
GIT_PS1='$(__git_ps1 "(%s)")'

if [ $UID -eq 0 ]; then
  PS1='\[\e[0;31m\]\u\[\e[m\]\[\e[1;37m\]@\h\[\e[m\] \[\e[1;34m\]\W\[\e[m\] \[\e[1;32m\]\$\[\e[m\] \[\e[1;32m\]'
elif [ -n "$SSH_CLIENT" ]; then
  PS1='\[\e[0;31m\](SSH)\[\e[m\]\[\e[1;37m\]\u@\h\[\e[m\] \[\e[1;34m\]\W\[\e[m\] \[\e[1;32m\]$(acpi -b | awk "{print \$4}" | cut -b1-3) $(__git_ps1 "(%s) ")\$\[\e[m\] \[\e[1;32m\]'
else
  PS1="\n-----------------------------------------------------------------------------\n"${SH_WHITE}"|"${SH_BLUE}"\u"${SH_WHITE}"@"${SH_RED}"\h"${SH_WHITE}": "${SH_GREEN}"Exited \$?"${SH_WHITE}" ("${SH_GREEN}"\@ \d"${SH_WHITE}")\n| "${SH_GREEN}"\w"${SH_WHITE}": "${SH_YELLOW}${FILES_STAT}" files, "${FILES_SIZE}${SH_WHITE}" "${SH_BLUE}${GIT_PS1}${SH_WHITE}"\n"${BL_ANGLE}${HORIZ_LINE}"> "
fi

debug()
{
  echo -n $'\e[0m';
}
trap debug DEBUG