#!/bin/bash
#
# $Id: repodiff 3 2006-09-21 18:48:39Z sevkin $
#
# subversion repository incremental backup over e-mail
#
# (c) 2006 Vsevolod Balashov under terms of GNU GPL v.2 or later

SVNROOT=/var/svn
EMAIL=your@email.here
STORE=`mktemp -d`
GPGCRYPT=n

for REPO in `ls $SVNROOT`; do 
	REPOPATH=$SVNROOT/$REPO;
	if [ -r $REPOPATH/youngest ]; then
		LATEST=`cat $REPOPATH/youngest`
		YOUNGEST=`svnlook youngest $REPOPATH`
		if [ $LATEST -lt $YOUNGEST ]; then
			svnadmin dump $REPOPATH --incremental -r $LATEST:$YOUNGEST >$STORE/$REPO 2>/dev/null
		fi
	else
		svnadmin dump $REPOPATH --incremental >$STORE/$REPO 2>/dev/null
	fi 
	echo $YOUNGEST >$REPOPATH/youngest 
done

if [ `ls $STORE | wc -w` -gt 0 ]; then
	BACKUP=repodiff_`date -u +%Y%m%d%H%M%S`.tar.bz2
	ATTACH=$STORE/../$BACKUP
	tar  -C $STORE -cjf $ATTACH .
	if [ $GPGCRYPT = y ]; then
		gpg -e -r $EMAIL $ATTACH
		ATTACH=$ATTACH.gpg
	fi
	echo "." | mutt -c $EMAIL -a $ATTACH -s "repository incremental backup"
	rm -f $ATTACH
fi

rm -rf $STORE