Put current git branch in shell prompt

.bash_profile

function parse_git_branch {
  ref=$(git symbolic-ref HEAD 2> /dev/null) || return
  echo "("${ref#refs/heads/}") "
}

RED="\[\033[0;31m\]"
YELLOW="\[\033[0;33m\]"
GREEN="\[\033[0;32m\]"
WHITE='\e[47m'
RESET='\e[0m'   
# found these here https://wiki.archlinux.org/index.php/Color_Bash_Prompt

export PS1="\h $RED\W $GREEN\$(parse_git_branch)\$$RESET "