A handy bash prompt customization that shows the working directory followed by the current branch, and an asterisk if the branch is dirrrrty.

gistfile1.sh

# Highlighting on prompt
RED="\[\033[0;31m\]"
YELLOW="\[\033[0;33m\]"
GREEN="\[\033[0;32m\]"
COLOR_NONE="\[\e[0m\]"

parse_git_branch() {
  git_status="$(git status 2> /dev/null)"
  branch_pattern="^# On branch ([^${IFS}]*)"
  remote_pattern="# Your branch is (.*) of"
  diverge_pattern="# Your branch and (.*) have diverged"

  if [[ ! ${git_status}} =~ "working directory clean" ]]; then
    state="${RED} "
  fi

  # add an else if or two here if you want to get more specific
  if [[ ${git_status} =~ ${remote_pattern} ]]; then
    if [[ ${BASH_REMATCH[1]} == "ahead" ]]; then
      remote="${YELLOW}↑"
    else
      remote="${YELLOW}↓"
    fi
  fi

  if [[ ${git_status} =~ ${diverge_pattern} ]]; then
    remote="${YELLOW}↕"
  fi

  if [[ ${git_status} =~ ${branch_pattern} ]]; then
    branch=${BASH_REMATCH[1]}
    echo " (${branch})${remote}${state}"
  fi
}

prompt_func() {
  git rev-parse --git-dir &> /dev/null
  previous_return_value=$?
  prompt="\w${GREEN}$(parse_git_branch)${COLOR_NONE} "
  if [[ $previous_return_value == 0 ]]; then
    PS1="${prompt}\$ "
  else
    PS1=$PS1_DEFAULT
  fi
}

PS1_DEFAULT=$PS1
PROMPT_COMMAND=prompt_func

set_tab_title() {
  echo -n -e "\033]0;${PWD##*/}\007"
}

PROMPT_COMMAND="set_tab_title ; $PROMPT_COMMAND"

Ok. Forget this - get on board with zsh and oh-my-zsh instead :D

https://github.com/robbyrussell/oh-my-zsh