Apache Ant loops and foreach without ant-contrib

aaa.jar

bbb.jar

loops.xml

<?xml version="1.0" encoding="utf-8"?>
<project default="x">

	<!-- params: -->
	<!-- repeat.target    the target to repeat -->
	<!-- repeat.n         the times to repeat -->

	<!-- available in repeat.target: -->
	<!-- repeat.i         current iteration no -->


	<property name="repeat.method" value="repeat.recursive" />
	<property name="repeat.method" value="repeat.script" />
	<property name="repeat.method" value="repeat.predefined" />

	<target name="x">
		<antcall target="${repeat.method}">
			<param name="repeat.target" value="realTarget" />
			<param name="repeat.n" value="3" />
		</antcall>
	</target>

	<target name="realTarget">
		<antcall target="${repeat.method}">
			<param name="repeat.target" value="realTarget2" />
			<param name="repeat.n" value="3" />
			<param name="parent.repeat.i" value="${repeat.i}" />
		</antcall>
	</target>

	<target name="realTarget2">
		<echo message="${parent.repeat.i} ${repeat.i}" />
	</target>

	<!-- does <antcall/> allowing to override one property using the "propertycopy" trick -->
	<!-- see http://ant.apache.org/faq.html#propertyvalue-as-name-for-property -->
	<macrodef name="ANT_CALL">
		<attribute name="target" />
		<attribute name="dstparam" />
		<attribute name="srcpropname" />
		<element name="elements" implicit="yes" optional="yes" />
		<sequential>
			<antcall target="@{target}">
				<param name="save.repeat.grow" value="${repeat.grow}" />
				<!-- reset in case of nested loops -->
				<param name="@{dstparam}" value="${@{srcpropname}}" />
				<elements />
			</antcall>
		</sequential>
	</macrodef>

	<!-- repeat using recursion -->
	<target name="repeat.recursive">
		<!-- default value -->
		<property name="repeat.grow" value="" />
		<condition property="repeat.break">
			<length string="${repeat.grow}" length="${repeat.n}" />
		</condition>
		<antcall target="_repeat.recursive" />
	</target>

	<!-- helper for forbidden recurse self  -->
	<target name="_repeat.recursive" unless="repeat.break">
		<!-- ${len.x}==1,${len.xx}==2, etc. -->
		<length property="len.${repeat.grow}" string="${repeat.grow}" />
		<ANT_CALL target="${repeat.target}" dstparam="repeat.i" srcpropname="len.${repeat.grow}">
			<!-- reset -->
			<param name="repeat.grow" value="" />
		</ANT_CALL>
		<antcall target="repeat.recursive">
			<param name="repeat.grow" value="${repeat.grow}x" />
		</antcall>
	</target>

	<target name="repeat.script">
		<script language="javascript">
			<![CDATA[
			for (var i = 0; i < 3; i++) {
				var t = project.createTask("antcall");
				t.setTarget(project.getProperty("repeat.target"));
				var p = t.createParam();
				p.setName("repeat.i");
				p.setValue(""+i);
				t.perform();
			}
		]]>
		</script>
	</target>

	<!-- repeat using predefined targets -->
	<!-- TODO: check ${repeat.n} -->
	<target name="repeat.predefined" depends="repeat.0, repeat.1, repeat.2">
	</target>

	<target name="repeat.0">
		<antcall target="${repeat.target}">
			<param name="repeat.i" value="0" />
		</antcall>
	</target>

	<target name="repeat.1">
		<antcall target="${repeat.target}">
			<param name="repeat.i" value="1" />
		</antcall>
	</target>

	<target name="repeat.2">
		<antcall target="${repeat.target}">
			<param name="repeat.i" value="2" />
		</antcall>
	</target>

</project>

unzip-each.xml

<?xml version="1.0" encoding="utf-8"?>
<project default="build">

	<!-- unzip each archive in a fileset into its own directory -->

	<!-- requires ant 1.7 -->
	
	<fileset dir="." id="archives.to.expand">
		<include name="*.jar"/>
	</fileset>
	
	<!-- number of cycles for our 'foreach' -->
	<resourcecount property="count.archives.to.expand">
		<fileset refid="archives.to.expand"/>
	</resourcecount>
	
	<target name="build">
		<antcall target="repeat.recursive">
			<param name="repeat.target" value="expand-archive" />
			<param name="repeat.n" value="${count.archives.to.expand}" />
		</antcall>
	</target>

	<target name="expand-archive">
		<length property="repeat.base1.i" string="x${save.repeat.grow}" />
		<resources id="nth.archive">
			<last>
				<first count="${repeat.base1.i}">
					<fileset refid="archives.to.expand"/>
				</first>
			</last>
		</resources>
		<pathconvert property="extract.dir" refid="nth.archive">
			<!-- replace last dot with underscore -->
			<mapper type="regexp" from="(.*)[.](.*)" to="\1_\2" />
		</pathconvert>
		<delete dir="${extract.dir}"/>
		<unzip dest="${extract.dir}">
			<resources refid="nth.archive"/>
		</unzip>
	</target>

	<!-- repeat using recursion -->
	<target name="repeat.recursive">
		<!-- default value -->
		<property name="repeat.grow" value="" />
		<condition property="repeat.break">
			<length string="${repeat.grow}" length="${repeat.n}" />
		</condition>
		<antcall target="_repeat.recursive" />
	</target>

	<!-- helper for forbidden recurse self  -->
	<target name="_repeat.recursive" unless="repeat.break">
		<antcall target="${repeat.target}">
			<param name="save.repeat.grow" value="${repeat.grow}" />
			<!-- reset in case of nested loops -->
			<param name="repeat.grow" value="" />
		</antcall>
		<antcall target="repeat.recursive">
			<param name="repeat.grow" value="${repeat.grow}x" />
		</antcall>
	</target>

</project>