Adds the current git branch and a dirty flag (lighting bolt) to your prompt

git_prompt.bash

function parse_git_dirty {
  git diff --quiet HEAD &>/dev/null
  [[ $? == 1 ]] && echo "⚡"
}

function parse_git_branch {
  git branch --no-color 2> /dev/null | sed -e '/^[^*]/d' -e "s/* \(.*\)/[\1$(parse_git_dirty)]/"
}

function proml {
  local        BLUE="\[\033[0;34m\]"
  local         RED="\[\033[0;31m\]"
  local   LIGHT_RED="\[\033[1;31m\]"
  local       GREEN="\[\033[0;32m\]"
  local LIGHT_GREEN="\[\033[1;32m\]"
  local       WHITE="\[\033[1;37m\]"
  local  LIGHT_GRAY="\[\033[0;37m\]"
  case $TERM in
    xterm*)
    TITLEBAR='\[\033]0;\w\007\]'
    ;;
    *)
    TITLEBAR=""
    ;;
  esac

PS1="${TITLEBAR}\
$LIGHT_GRAY\w$GREEN $(parse_git_branch)\
 $WHITE\$ $LIGHT_GRAY"
PS2='> '
PS4='+ '
}
proml