manager.properties

hudson.backup = /tmp/hudson-backup/
hudson.backup.filename = hudson-backup
hudson.backup.days = 30
hudson.home = /srv/hudson/hudson-home/

manager.xml

<?xml version="1.0" encoding="UTF-8"?>
<project name="hudson manager" default="Backup" basedir=".">

  <description>
        Hudson manager @@VERSION@@
  </description>
  <!-- Get options from properties file -->
  <echo message="reading properties from: manager.properties" />  
  <property file="manager.properties"/>    
   <!-- Backup script run by: ant -f manager.xml target -->
   
   <target name="backupOnlyJobs">
        <mkdir dir="${hudson.backup}" />
   
        <tstamp/>
        <tar destfile="${hudson.backup}/${hudson.backup.filename}-${DSTAMP}${TSTAMP}.tar.gz" compression="gzip">
            <fileset dir="${hudson.home}">
                <include name="**/config.xml"/>
            </fileset>
        </tar>            
   </target>
       
   <target name="backup">
        <mkdir dir="${hudson.backup}" />
        <!-- Define which files should be removed ( = older than 1 month) -->   
        <tstamp>   
            <format property="1_month_ago" pattern="dd/MM/yyyy hh:mm aa" offset="-${hudson.backup.days}" unit="day"/>   
        </tstamp>   
           
        <echo message="Delete files older than ${1_month_ago}"/>   
        
        <!-- Clean up any old files -->
        <exec dir="${hudson.backup}" executable="find">
            <arg value="${hudson.backup} -name 'backup-*' -mtime +${hudson.backup.days} -exec rm {} \;" />
        </exec>     
   
        <tstamp/>
        <tar destfile="${hudson.backup}/${hudson.backup.filename}-${DSTAMP}${TSTAMP}.tar.gz" compression="gzip">
            <fileset dir="${hudson.home}">
                <include name="**/config.xml"/>
                <include name="plugins/*.hpi"/>
                <exclude name="fingerprints/**" />
                <exclude name="updates/**" />
                <exclude name="userContent/**" />
            </fileset>
        </tar>        
   </target> 

</project>