proposal/sandbox/input/src/testcases/input.xml

<project name="manual-test-for-input" default="both">
  <target name="single">
    <input addproperty="single" message="This is a prompt" />
    <echo>$${single} is ${single}</echo>
  </target>

  <target name="multi">
    <input addproperty="multi" 
           message="This is a prompt " 
           validargs="1,2" />
    <echo>$${multi} is ${multi}</echo>
  </target>

  <target name="both" depends="single,multi" />
</project>