#!/bin/sh
  # Print additional version information for non-release trees.

  usage() {
  	echo "Usage: $0 [srctree]" >&2
  	exit 1

  }

  cd "${1:-.}" || usage

  # Check for git and a git repo.
  if head=`git rev-parse --verify HEAD 2>/dev/null`; then
  	# Do we have an untagged version?

  	if git name-rev --tags HEAD | grep -E '^HEAD[[:space:]]+(.*~[0-9]*|undefined)$' > /dev/null; then

  		printf '%s%s' -g `echo "$head" | cut -c1-8`
  	fi

  	# Are there uncommitted changes?

  	if git diff-index HEAD | read dummy; then

  		printf '%s' -dirty

  	fi
  fi