antからJavaScriptを呼び出すときの例

build1.xml

<?xml version="1.0" encoding="UTF-8"?>
<project default="a">
  <target name="a">
    <script language="javascript"><![CDATA[
      print('hello world!');
    ]]></script>
  </target>
</project>

build2.xml

<?xml version="1.0" encoding="UTF-8"?>
<project default="a">
  <target name="a">
    <script language="javascript"><![CDATA[
      throw 'わあ！';
    ]]></script>
  </target>
</project>

build3.xml

<?xml version="1.0" encoding="UTF-8"?>
<project default="a">
  <target name="a">
    <script language="javascript"><![CDATA[
      try{
        throw '';
      }catch(e){
        project.setProperty('fail', '');
      }
    ]]></script>
    <fail if="fail" message="JavaScriptでエラーが起きた" />
  </target>
</project>