Printing Ant properties for dubugging or logging

Say you have some id that you want the value for :-

    <path id="tools.class.path">

      <pathelement location="${xerces.jar}"/>

      <pathelement location="${testlet.jar}"/>

      <pathelement location="${junit.jar}"/>

      <pathelement location="${tools.jar}"/>

      <fileset dir="${tools.dir}/lib">

        <include name="*.jar" />

        <exclude name="testlet.jar"/>

        <exclude name="xerces.jar"/>

      </fileset>

    </path>

It would be nice to be able to print the contents of this path, for debugging. The obvious approach:-

    <echo message="tools.class.path is ${tools.class.path}"/>

Does _not_ work. Here's how to do it:-

• First declare a property, referring to the path.
  
• Then print the property:
  

    <property name="cp" refid="tools.class.path"/>

    <echo message="Classpath is ${cp}"/>