Bob pointed out that the extends bound is not necessary in Listable. Enough to have it in List.
1 <?xml version="1.0" encoding="UTF-8"?>
2 <project name="testing build script" default="all" basedir=".">
3 <taskdef name="grepcopy" classname="org.apidesign.infra.ant.GrepCopy"/>
4 <fail unless="out.dir"/>
7 <grepcopy target="${out.dir}">
8 <fileset dir="${dir1}">
9 <include name="${include1}"/>
15 <grepcopy target="${out.dir}" baseurl="${out.url}">
16 <fileset dir="${dir1}">
17 <include name="${include1}"/>