jasmine214--love

原文：http://carywu.blog.51cto.com/13185/207571
最近要给美国的SVN服务器做升级，由于这台服务器有一定年份了，在本公司也算是个三朝元老，保存了多少code啊！。为了保险起见，老板将迁移的工作郑重的交到我的手上。在欣欣然的同时也颤抖着。
不过还好我已经对其轻车熟路，在新的服务器上安装好apache和subversion软件后，开始着手备份与迁移了。
由于旧服务器版本太低，没有svnsync的功能，考虑再三，我选择使用了svnadmin dump去做备份。
可是有一个问题了，每个库的版本都有几万了，然后服务器上有十几个库，我可没耐心一个个输入svnadmin dump去备份它们，那会让我觉得长夜漫漫，难于睡眠！
管理员的最高境界就是花力气去懒惰，我很向往这个境界。所以，我花了些时间写了个shell，就让系统自己去干这些事情吧！

shell功能：
只需要大家修改源库所在的目录，和备份存放的目录就可以了。
第一次运行会全部备份，然后以后每次运行会增量备份。
所以，恢复的时候，先恢复全部备份，然后依次按照日期恢复增量备份即可。

#!/bin/sh

#########################################################
# this script is used for svn repository backup
# written: carywu
# date: 2008/11/21
#########################################################

###################################
# mail address for status updates
#  - This is used to email you a status report
###################################
MAILADDR=carywu@yahoo.cn

###################################
# backup directory,please change it
# - This is the path to the backup directory
###################################
BACKUPDIR=/svnroot/svnback

###################################
# svn repository directory, please change it.
# - This is the path to the directory you want to archive
###################################
SVNDIR=/svnroot/repository

###################################
# HOSTNAME and project list
#  - This is also used for reporting
###################################
ProjectLst=$BACKUPDIR/projectlist.txt

###################################
# svn backup log path and date
#  - This is used to log result
###################################
LogFile=$BACKUPDIR/svnback.log
DATE=`date +%Y%m%d-%T`
###################################
# svn command path
# - This is the path to the directory you want to archive
###################################
export PATH=$PATH:/bin:/usr/bin:/usr/local/bin

# our actual rsyncing function
do_accounting()
{
        echo " " >> $LogFile
        echo " " >> $LogFile
        echo "###########################" >> $LogFile
        echo "$DATE" >> $LogFile
        echo "###########################" >> $LogFile
        cd $BackDir
}

do_svndump()
{
   PROJECTLIST=`cat $ProjectLst`
   cd $SVNDIR
   for project in $PROJECTLIST
          do
          echo "begin to dump $project databases" >> $LogFile
                if [ ! -f $BACKUPDIR/$project.dump ]
                then
                YOUNGEST=`svnlook youngest $project`
                svnadmin dump $project > $BACKUPDIR/$project.dump
                echo "OK,dump file successfully!!"
                echo "$YOUNGEST" > $BACKUPDIR/$project.youngest
                else
                        echo "$project.dump existed,will do increatment job" >> $LogFile
                        if [ ! -f $BACKUPDIR/$project.youngest ]
                        then
                        echo "error, no youngest check!" >> $LogFile
                        else
                                PREVYOUNGEST=`cat $BACKUPDIR/$project.youngest`
                                NEWYOUNGEST=`svnlook youngest $project`
                                if [ $PREVYOUNGEST -eq $NEWYOUNGEST ]
                                then
                                        echo " no database updated!" >> $LogFile
                                else
                                        LASTYOUNGEST=`expr $PREVYOUNGEST + 1`
                                        echo "last youngest is $LASTYOUNGEST" >> $LogFile
                                        svnadmin dump $project --revision $LASTYOUNGEST:$NEWYOUNGEST --incremental > $BACKUPDIR/$project-$LASTYOUNGET-$NEWYOUNGEST.$DATE
                                        echo "$NEWYOUNGEST" > $BACKUPDIR/$project.youngest
                                fi
                        fi
  fi
        done
}

# our post rsync accounting function
do_mail()
{
   mail $MAILADDR -s svn-back_log < $LogFile
}
# some error handling and/or run our backup and accounting
do_accounting && do_svndump && do_mail