svn checkout的ant脚本

Question

我已经编写了下面的构建脚本来从svn进行结账，但它无效。 请帮帮我。

    <?xml version="1.0" encoding="iso-8859-1"?>

    <project name="test" basedir="." >
<path id="path.svnant">
    <pathelement location="/lib/svnant.jar" />
    <pathelement location="/lib/svnClientAdapter.jar" />
    <pathelement location="/lib/svnjavahl.jar" />
</path>
   <target name="checkout-codebase">
    <property name="svn.username" value="abs"/>
    <property name="svn.password" value="abs123"/>
    <property name="svn.url"   value="Path-to-svn-trunk-folder"/>
    <property name="project.code" value="./Mbuild"/>

    <typedef resource="org/tigris/subversion/svnant/svnantlib.xml"    classpathref="path.svnant" />

    <svnSetting svnkit="true" javahl="false" id="svn.settings"     username="${svn.username}" password="${svn.password}"/>
    <svn refid="svn.settings">
        <checkout url="${svn.url}" revision="HEAD" destpath="${project.code}" />
    </svn>
</target>