gistfile1.sh

# version for bash 2.03
# no use of =~ and BASH_REMATCH allowed
function parse_git_branch {
  if [[ `uname -s` == "SunOS" ]]; then
      return 1
  fi
  if git rev-parse --git-dir >/dev/null 2>&1
  then
      git_status="$(git status 2> /dev/null)"
      remote_pattern="# Your branch is "
      diverge_pattern="have diverged"
      if echo ${git_status} | grep -qv "working directory clean"; then
	  state="*"
      fi
      # add an else if or two here if you want to get more specific
      if echo ${git_status} | grep -q "${remote_pattern}"; then
	  if echo ${git_status} | grep -q "ahead" ; then
	      remote="↑"
	  else
	      remote="↓"
	  fi
      fi
      if echo ${git_status} | grep -q "${diverge_pattern}"; then
	  remote="↕"
      fi
      branch=`echo ${git_status} | grep -v "Not currently on any branch" | head -n1 | sed -e 's/^\# On branch \([a-zA-Z0-9\-]*\).*$/\1/'`
      echo "[${branch}${state}${remote}] "
  fi
}