#!/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		if tag=`git describe 2>/dev/null`; then			echo $tag | awk -F- '{printf("-%05d-%s", $(NF-1),$(NF))}'		fi	fi 	# Are there uncommitted changes?	git update-index --refresh --unmerged > /dev/null	if git diff-index --name-only HEAD | grep -v "^scripts/package" \	    | read dummy; then		printf '%s' -dirty	fi 	# All done with git	exitfi # Check for mercurial and a mercurial repo.if hgid=`hg id 2>/dev/null`; then	tag=`printf '%s' "$hgid" | cut -d' ' -f2` 	# Do we have an untagged version?	if [ -z "$tag" -o "$tag" = tip ]; then		id=`printf '%s' "$hgid" | sed 's/[+ ].*//'`		printf '%s%s' -hg "$id"	fi 	# Are there uncommitted changes?	# These are represented by + after the changeset id.	case "$hgid" in		*+|*+\ *) printf '%s' -dirty ;;	esac 	# All done with mercurial	exitfi # Check for svn and a svn repo.if rev=`svn info 2>/dev/null | grep '^Revision'`; then	rev=`echo $rev | awk '{print $NF}'`	changes=`svn status 2>/dev/null | grep '^[AMD]' | wc -l` 	# Are there uncommitted changes?	if [ $changes != 0 ]; then		printf -- '-svn%s%s%s' "$rev" -dirty "$changes"	else		printf -- '-svn%s' "$rev"	fi 	# All done with svn	exitfi