<taskdef name="hibernatetool"
         classname="org.hibernate.tool.ant.HibernateToolTask"
         classpathref="toolslib" />

    <target name="makeSchema">

        <hibernatetool destdir=".">

            <configuration propertyFile="${hibernate.properties}">
                <fileset dir="${src.dir}">
                    <include name="**/*.hbm.xml"/>
                </fileset>
            </configuration>

            <hbm2ddl export="true" drop="true" outputfilename="schema.ddl"/>

        </hibernatetool>

    </target>