BootstrapIvy.xml

<?xml version="1.0" encoding="UTF-8"?>
<project name="BootstrapIvy" default="all" basedir="." xmlns:ivy="antlib:org.apache.ivy.ant">
    <property name="ivy.install.version" value="2.3.0-rc2" />
    <condition property="ivy.home" value="${env.IVY_HOME}">
        <isset property="env.IVY_HOME" />
    </condition>
    <property name="ivy.home" value="${user.home}/.ant" />
    <property name="ivy.jar.dir" value="${ivy.home}/lib" />
    <property name="ivy.jar.file" value="${ivy.jar.dir}/ivy.jar" />
    
    <target name="download-ivy" unless="offline">
        <available file="${ivy.jar.file}" property="ivy.available"/>
        <antcall target="-download-ivy" />
    </target>
    
    <target name="-download-ivy" unless="ivy.available">
        <mkdir dir="${ivy.jar.dir}"/>
        <get src="https://repo1.maven.org/maven2/org/apache/ivy/ivy/${ivy.install.version}/ivy-${ivy.install.version}.jar" 
             dest="${ivy.jar.file}" usetimestamp="true"/>
    </target>

    <!-- init-ivy will bootstrap Ivy if the user doesn't have it already -->
    <target name="init-ivy" depends="download-ivy" unless="ivy.lib.path">
        <path id="ivy.lib.path">
            <fileset dir="${ivy.jar.dir}" includes="*.jar"/>
        </path>
        <taskdef resource="org/apache/ivy/ant/antlib.xml"
                 uri="antlib:org.apache.ivy.ant" classpathref="ivy.lib.path"/>
    </target>
</project>