Java 扩展现有的ant路径标记

是否可以扩展ant构建文件中的现有路径标记？例如，我想扩展：

<path id="project.classpath">
  <pathelement path="build/classes" />
</path>

---

如果尝试以下操作，则无法直接扩展现有路径：

<path id="project.classpath">
  <pathelement path="build/classes" />
</path>

<path id="project.classpath">
  <pathelement path="${ant.refid:project.classpath}" />
  <pathelement path="module1/lib" />
</path>

每次都将

id

重新分配到不同的路径。通常这是一个坏主意，因为您无法确定构建中的每个点使用了什么路径：所以请小心使用

<path id="project.classpath">
  <pathelement path="build/classes" />
</path>

<path id="project.classpath">
  <pathelement path="${ant.refid:project.classpath}" />
  <pathelement path="module1/lib" />
</path>

<path id="cp">
  <pathelement path="build/classes" />
</path>
<echo message="${ant.refid:cp}" />

<string id="cps" value="${toString:cp}" />
<path id="cp">
  <pathelement path="${ant.refid:cps}" />
  <pathelement path="module1/lib" />
</path>
<echo message="${ant.refid:cp}" />

<string id="cps" value="${toString:cp}" />
<path id="cp">
  <pathelement path="${ant.refid:cps}" />
  <pathelement path="module2/lib" />
</path>
<echo message="${ant.refid:cp}" />

[echo] /ant/path/build/classes
[echo] /ant/path/build/classes:/ant/path/module1/lib
[echo] /ant/path/build/classes:/ant/path/module1/lib:/ant/path/module2/lib