My simple version of a bash prompt that shows current git info.

git-prompt.sh

## git status in prompt
find_git_status() {
 
  local c_red='\[\e[31m\]'
  local c_green='\[\e[32m\]'
  local c_clear='\[\e[0m\]'
 
  ps1pc_start="$1"
  ps1pc_end="$2"
 
  local branch
 
  if branch=$(git rev-parse --abbrev-ref HEAD 2> /dev/null); then
    if [[ "$branch" == "HEAD" ]]; then
      branch='detached*'
    fi
    git_branch="$branch"
  else
    git_branch=""
  fi
 
  if [[ "$git_branch" != "" ]]; then
    git_sha=$(git rev-parse --short HEAD 2> /dev/null)
    local status=$(git status --porcelain 2> /dev/null)
    if [[ "$status" != "" ]]; then
      git_message=" ($c_red$git_sha@$git_branch*$c_clear)"
    else
      git_message=" ($c_green$git_sha@$git_branch$c_clear)"
    fi
  else
    git_message=''
  fi

  ## Virtual env
  if test -z "$VIRTUAL_ENV" ; then
      PYTHON_VIRTUALENV=""
  else
    PYTHON_VIRTUALENV="(`basename $VIRTUAL_ENV`)"
  fi

 
  export PS1=$ps1pc_start$git_message$ps1pc_end
}

PROMPT_COMMAND='find_git_status "$PYTHON_VIRTUALENV\u@\h:\w" "\\\$ "'