git supercharged bash prompt

.bash_prompt.sh

txtund=$(tput sgr 0 1)          # Underline
txtbld=$(tput bold)             # Bold

reset='\[\e[00m\]'
bold='\[\e[01m\]'
red='\[\e[31m\]'
green='\[\e[32m\]'
orange='\[\e[33m\]'
blue='\[\e[34m\]'
purple='\[\e[35m\]'
cyan='\[\e[36m\]'
gray='\[\e[37m\]'
bright='\[\e[39m\]'

function short_pwd {
  pwd=$(pwd)
  first=$(basename $pwd)
  rest=$(dirname $pwd)
  second=$(basename $rest)
  rest=$(dirname $rest)
  third=$(basename $rest)
  if [ $second = "/" ]; then
      echo -n "/$first"
  elif [ $third = "/" ]; then
    echo -n "/$second/$first"
  else
    echo -n "$third/$second/$first"
  fi
}

function myprompt {
  git_top=$(git rev-parse --show-toplevel 2>/dev/null)

  if [ $? -ne 0 ]; then
      git_top=""
      GIT=0
  else
      git_top=$(basename $git_top)
      GIT=1
  fi

  if [ $GIT -ne 0 ]; then
      git_branch=$(git branch | grep "*" | awk '{print $2}')
      if [ $? -ne 0 ]; then
          git_branch=""
      fi

      if [ $git_branch = "master" ]; then
          branch=""
      else
          branch=" $bold$red($git_branch)$reset"
      fi
  fi

  colordir="${bold}${blue}$(short_pwd)"
  if [ $GIT -ne 0 ]; then
      # We're in a git repo
      EDITS=$(git status -s | wc -l)
      if [ $EDITS -ne 0 ]; then
          edits=" $bold$orange($EDITS)$reset"
      else
          edits=""
      fi
      AHEAD=$(git rev-list @{u}..HEAD 2>/dev/null | wc -l)
      BEHIND=$(git rev-list HEAD..@{u} 2>/dev/null | wc -l)
      if [ $AHEAD -ne 0 -a $BEHIND -eq 0 ]; then
          ahead_behind="$bold$red +$AHEAD"
      elif [ $BEHIND -ne 0 -a $AHEAD -eq 0 ]; then
          ahead_behind="$bold$red -$BEHIND"
      elif [ $AHEAD -eq 0 -a $BEHIND -eq 0 ]; then
          ahead_behind=""
      else
          ahead_behind="$bold$red +$AHEAD -$BEHIND"
      fi
      git="${bold}${green}$git_top$edits$ahead_behind"
      PS1="$git$branch $colordir$reset\$ "
  else
      PS1="$colordir$reset\$ "
  fi
  if [ $VIRTUAL_ENV ]; then
      PS1="$bold$cyan$(basename $VIRTUAL_ENV)$reset $PS1"
  fi
}

unset PS1
if [ $USER = 'slacy' ]; then
   PROMPT_COMMAND=myprompt
else
   PS1='\u@\h$ '
fi

Thanks. This was awesome!