Ivy example

build.xml

<project name="hello-ivy" default="run" xmlns:ivy="antlib:org.apache.ivy.ant">

    <property name="lib.dir" value="lib" />
    <property name="build.dir" value="build" />
    <property name="src.dir" value="src" />
    
    <!-- paths used for compilation and run  -->
    <path id="lib.path.id">
        <fileset dir="${lib.dir}" />
	</path>
    <path id="run.path.id">
        <path refid="lib.path.id" />
        <path location="${build.dir}" />
    </path>
    
    <!-- ================================= 
          target: resolve              
         ================================= -->
	<property name="ivy.install.version" value="2.2.0" />
    <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">

        <mkdir dir="${ivy.jar.dir}"/>
        <!-- download Ivy from web site so that it can be used even without any special installation -->
        <get src="http://repo2.maven.org/maven2/org/apache/ivy/ivy/${ivy.install.version}/ivy-${ivy.install.version}.jar" 
             dest="${ivy.jar.file}" usetimestamp="true"/>
    </target>

    <target name="init-ivy" depends="download-ivy">
        <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>

    <target name="resolve" description="--> retreive dependencies with ivy" depends="init-ivy">
        <ivy:retrieve/>
    </target>    
    
    <!-- ================================= 
          target: report              
         ================================= -->
    <target name="report" depends="resolve" description="--> generates a report of dependencies">
        <ivy:report todir="${build.dir}"/>
    </target>

    <!-- ================================= 
          target: run
         ================================= -->
    <target name="run" depends="resolve" description="--> compile and run the project">
        <mkdir dir="${build.dir}" />
        <javac srcdir="${src.dir}" destdir="${build.dir}" classpathref="lib.path.id" />
    	<property name="msg" value="hello ivy !"/>
        <java classpathref="run.path.id" classname="example.Hello">
        	<arg value="-message"/>
        	<arg value="${msg}"/>
    	</java>
    </target>

    <!-- ================================= 
          target: clean              
         ================================= -->
    <target name="clean" description="--> clean the project">
        <delete includeemptydirs="true">
            <fileset dir="${basedir}">
            	<exclude name="src/**" />
            	<exclude name="build.xml" />
              <exclude name="ivy.xml" />
        	</fileset>
    	</delete>
    </target>
	
    <!-- ================================= 
          target: clean-cache              
         ================================= -->
	<target name="clean-cache" description="--> clean the ivy cache">
		<ivy:cleancache />
	</target>
</project>

ivy.xml

<!--
   Licensed to the Apache Software Foundation (ASF) under one
   or more contributor license agreements.  See the NOTICE file
   distributed with this work for additional information
   regarding copyright ownership.  The ASF licenses this file
   to you under the Apache License, Version 2.0 (the
   "License"); you may not use this file except in compliance
   with the License.  You may obtain a copy of the License at

     http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing,
   software distributed under the License is distributed on an
   "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
   KIND, either express or implied.  See the License for the
   specific language governing permissions and limitations
   under the License.    
-->
<ivy-module version="2.0">
    <info organisation="org.apache" module="hello-ivy"/>
    <dependencies>
        <dependency org="commons-lang" name="commons-lang" rev="2.0"/>
        <dependency org="commons-cli" name="commons-cli" rev="1.0"/>
    </dependencies>
</ivy-module>