ivyskeleton/build-ivy.xml

<?xml version="1.0" encoding="UTF-8"?>
<project name="ivy-util" basedir="." xmlns:ivy="antlib:org.apache.ivy.ant">
    <description>Ivy utilities</description>

    <property name="ivy.install.version" value="2.2.0"/>
    <property name="ivy.cache.ttl.default" value="7d"/>

    <target name="-init-lib-directory">
        <mkdir dir="lib"/>
    </target>

    <target name="-init-ivy" depends="-init-lib-directory">
        <path id="ivy.classpath">
           <fileset dir="${ivy.search.path}/" includes="*.jar"/>
           <fileset dir="lib" includes="*.jar"/>
        </path>

        <available classname="org.apache.ivy.ant.IvyConfigure"
              property="ivy.available" classpathref="ivy.classpath" />
    </target>

    <target name="-download-ivy" depends="-init-ivy" unless="ivy.available">
        <echo message="Retrieving Ivy"/>
        <get src="http://repo1.maven.org/maven2/org/apache/ivy/ivy/${ivy.install.version}/ivy-${ivy.install.version}.jar"
             dest="lib/ivy-${ivy.install.version}.jar"/>
    </target>

    <target name="-init-dependencies" depends="-download-ivy" unless="ivy.done">
        <!-- Regenerate the classpath as we may have just downloaded Ivy -->
        <path id="ivy.classpath">
           <fileset dir="${ivy.search.path}/" includes="*.jar"/>
           <fileset dir="lib" includes="*.jar"/>
        </path>

        <taskdef resource="org/apache/ivy/ant/antlib.xml" uri="antlib:org.apache.ivy.ant" classpathref="ivy.classpath"/>
        <ivy:settings file="etc/ivy/ivysettings.xml"/>
        <ivy:retrieve symlink="true" pattern="lib/[artifact]-[revision].[ext]" />
        <property name="ivy.done" value="true"/>
    </target>
</project>