If I understand your requirements right, you want to delete recursively all
directories which contain a marker file.
So maybe you could use this (have a deeper look at the <delete> task).
Jan
<project xmlns:au="antlib:org.apache.ant.antunit" xmlns:if="ant:if"
default="antunit">
<property name="test.dir" value="test" />
<!-- from Ant's src/tests/antunit/antunit-base.xml -->
<target name="antunit">
<antunit xmlns="antlib:org.apache.ant.antunit">
<plainlistener />
<file file="${ant.file}" xmlns="antlib:org.apache.tools.ant" />
</antunit>
</target>
<macrodef name="create">
<attribute name="dir" />
<attribute name="delete" default="false"/>
<sequential>
<mkdir dir="@{dir}" />
<touch file="@{dir}/file.txt" />
<touch file="@{dir}/-to-delete-" if:true="@{delete}"/>
</sequential>
</macrodef>
<target name="setUp">
<create dir="${test.dir}/dir1/dir11/dir111" />
<create dir="${test.dir}/dir1/dir11/dir112" delete="true"/>
<create dir="${test.dir}/dir1/dir12/dir121" />
<create dir="${test.dir}/dir1/dir12/dir122" />
<create dir="${test.dir}/dir2" delete="true"/>
<create dir="${test.dir}/dir2/dir21/dir211" />
<create dir="${test.dir}/dir2/dir21/dir212" />
<create dir="${test.dir}/dir2/dir22/dir221" />
</target>
<target name="tearDown">
<delete dir="${test.dir}" />
</target>
<target name="testDeleteByMarkerFile">
<!-- check prepared environment -->
<au:assertFileExists file="${test.dir}/dir1/dir11/dir111/file.txt"/>
<au:assertFileExists file="${test.dir}/dir1/dir11/dir112/file.txt"/>
<au:assertFileExists file="${test.dir}/dir2/file.txt"/>
<!-- delete -->
<delete includeemptydirs="true">
<fileset dir="${test.dir}">
<scriptselector language="javascript">
markerfile = new java.io.File(file.getParent(),
"-to-delete-");
self.setSelected(markerfile.exists());
</scriptselector>
</fileset>
</delete>
<!-- check assertions -->
<au:assertFileExists file="${test.dir}/dir1/dir11/dir111/file.txt"/>
<au:assertFileDoesntExist
file="${test.dir}/dir1/dir11/dir112/file.txt"/>
<au:assertFileDoesntExist file="${test.dir}/dir2/file.txt"/>
</target>
</project>
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